OPTICAL COHERENCE TOMOGRAPHY HAVING RING-LASER USING REVERSE OUTPUT WITH CIRCULATOR FOR TRIGGER SIGNAL EXTRACTION AND OPERATING METHOD THEREOF
The present invention refers to using circulators utilizing reverse output trigger signal extraction type ring Laser having an optical tomography method relates to device and method for its operation, as well as for an object is provided to effectively use light energy into a monolayer of photographing optical tomography can be industrial which is used as a device and method for the operation method are disclosed. Optical tomography device (Optical Coherence Tomography, OCT) is, in the direction of travel of light reflected or scattered in a position specified resolution (Coherence) degree with respect to coherence length light intensity distribution can be as an elastic. Generally optical tomography device is particularly for accomplishing a like eye teeth are disclosed. In addition, within the blood vessel, field, various tissue such as skin in precise diagnosis possible causes. However, industrial object of monolayers of photographing not subjected to optical tomography device are provided which flows by the development. U.S. registration patent number 07916387 call (title of the invention: Methods and apparatus for swept provided a source optical coherence tomography, is combined with a load. prior art 1 hereinafter) in, ring mad width device (Ring SOA), isolator, car coupler, piezo variable filter, configured [...]as ring competitive exhibition; booster optical amplifier (Booster SOA) and laser is composed of, 50% as ring competitive exhibition output of said signal energy is transmitted to the booster optical amplifier (Booster SOA) optical tomography device is over output so from the second disclosure. the prior art 1, ring mad width (Ring SOA) device in the opposite direction of propagation of the optical signal transmitted from the isolator output driving transistor, reduced efficiency of the light energy that door number point number 1. In addition, the prior art 1, for the laser output device in 50% of the light energy transmitted [...] car ring mad width (Ring SOA) using reduced number point number 2 door that the laser output. And, the prior art 1, the laser output for booster optical amplifier (Booster SOA) integral with the, installation and management in cost rises number point that door number 3. The technical objectives of this invention is descriptive and not one number to number mentioned above, specific number are not in yet another technique referred in the art to clearly understand the present invention from the substrate is provided below may be person with skill in the art are disclosed. Said techniques in order to achieve a specific number, one embodiment of the present invention examples, current driver, used to receive a supply current driver electrical energy from said optical amplifier gain medium, said optical amplifier receives optical signal from optical signal transmission direction number plower number 1 circulator, optical signal from said optical amplifier receives optical transmitter arranged in number isolator valve timing, receives the optical signal from said optical signal isolator wherein the number of the optical signal transmission direction with wavelength converting effect output optical fiber, said output optical fiber receives optical signal from optical signal and outputs said number 1 receives light emitted from the light source part including a filter wavelength sweeping [...]; receives optical signal from said number 1 circulator, a trigger signal which generate a trigger signal and the signal receiving unit receives said output optical signal from optical fiber, a monolayer of interferometer which and by collecting information object, said optical amplifier has a, ring (ring) light source wavelength sweeping said resonant circuit formed as a negative number 1 receives the output signal of said filter in one direction, said number 1 number 1 optical amplifier output signals and said number 1 number 2 it is a reverse direction propagating direction of the light amplifier output signal number 2 in one direction creating reverse output trigger signal extraction type ring Laser characterized using circulators utilizing a number having an optical tomography device under public affairs substrate. In example of the present invention embodiment, [...] said number 1, said number 2 receives said optical amplifier output signal can be output to a generating trigger signal. In example of the present invention embodiment, selectively receives said output optical fiber optical signal optical signal polarization crystal further comprises a control unit number can be. In example of the present invention embodiment, number is connected between said water level and said polarizing filter, said filter of said light wavelength sweeping resonance period match the driving cycle can be further comprises fiber delay line. Example of the present invention embodiment in, which is located between said output [...] said interferometer, said output optical fiber to amplify light signals outputted from the interferometer further comprises transmitting to said booster optical amplifier (BOA) can be done via the disclosed. In example of the present invention embodiment, said trigger signal generation, transmission direction of the optical signal inputted to the optical signal from said number 1 circulator plower number number 2 circulator; said number 2 receives optical signal from circulator, optical signal receives reflection filter and said number 2 receives light energy converted into electrical energy to optical signal from circulator comprising a photodiode can be. In example of the present invention embodiment, [...] said number 2, said controller outputs a photodiode can be transmitting said optical signal reflection filter. In example of the present invention embodiment, said interferometry is, identifying interference pattern of the optical signal comprising a galvanometer plower [...] interferometer and imaging position number can be. In example of the present invention embodiment, said filter portion is formed, optical fiber-Perot tunable filter (fFP-a tF), Perot variable band pass filter (fP-a tBPF), grating aid orthogonal coupling communication terminal (GAVCCF), fiber grating element (OFG), optical fiber Bragg grating (FBG) or dielectric thin film filter (TFF) one can be formed. In example of the present invention embodiment, said filter portion is formed, period and waveform of the optical signal having any number plower (AFG) function generator can be. Said techniques in order to achieve a specific number, one embodiment of the present invention examples, supplying electrical power to said optical amplifier (i) said current driver from step; (ii) said number 1 direction from said optical amplifier is the optical signal being transmitted to said isolator, said number 2 color from said number 1 is the optical signal from said optical amplifier [...] direction; said output optical signal is sent from said isolator [...] (iii), signals are transmitted from said number 1 circulator generating trigger signal light from said step; said light from said output optical fiber (iv) interferometer or color from the signal from said filter; said filter and said number 1 (v) optical signal is transmitted from said optical amplifier (vi) said number 1 circulator [...] optical signals is transmitted from the and by, 9990 001003999 (ii) step to said step (vi) is repeated the reverse output trigger signal extraction type ring Laser characterized using circulators utilizing device having an optical tomography method operation of a number under public affairs substrate. The present invention refers to, optical amplifier in a direction opposite to the medium is transferred from the isolator switch from without, through circulators cut pass device generating trigger signal, number 1 that effect the efficiency of light energy. In addition, the present invention refers to, optical amplifier used in light energy and separate intermediate the compressor and other components to be used without laser output, laser output increase, a monolayer of human as well as a well-known object number 2 is also enabling use for industrial effect. And, the present invention refers to, for elevation of the laser output necessary booster used in an optical amplifier (Booster SOA), equipment to minimize the number and equipment scale can be number 3 effect. The effect of the invention is confined within said has the effect, the constitution of the invention including a detailed description of the invention or claim deduced from all possible effect is understood to should. Figure 1 shows a generally conventional techniques (OCT) optical tomography device configuration are disclosed. Figure 2 shows a device according to example of the present invention embodiment of optical tomography (OCT) also are disclosed. In Figure 3 of the present invention embodiment example optical tomography device according to the spectrum of the laser beam which is emitted wavelength tunable bandwidth graph are disclosed. Figure 4 of the present invention embodiment of the optical signal spectrum graph for generating trigger signal unit is transferred to the example from circulator according to number 1 are disclosed. Figure 5 of the present invention embodiment example according to reflected light spectrum reflected from a reflection filter for graph are disclosed. Figure 6 of the present invention embodiment example according to an electrical signal is converted to a oscilloscope measured at graph (oscilloscope) passing through in the photodiode are disclosed. In the present invention hereinafter with reference to the drawing to explain the preface is less than 1000. However the present invention refers to several different can be embodied in the form of, for example and not the confined within a the embodiment taught herein. The present invention is described in drawing and unambiguously account for when the dispensed portion that is independent, like part subjected to a similar drawing code is configured to receive through the entire specification. The entire specification, any portion to other assistant "(connection, contact, coupled) connected" when, this "connected directly" as well as when, the other interposed therebetween intermediate comprises a unit when "indirectly connected". In addition any components that "comprising" when any portion, particularly the opposite substrate under the outside components without other components of the other number which is further switched to each other. A term used in a particular embodiment to account for example specification only is used, the present invention intending to be define is endured. It is apparent that a single representation of the differently in order not providing language translators, comprising plurality of representation. In the specification, the term "comprising" or "having disclosed" specification of articles feature, number, step, operation, components, parts or specify a combination not present included, another aspect of one or more moveable number, step, operation, component, component or a combination of these is understood to presence of or additionally pre-times those possibility should not number. For example products on the attached drawing of the present invention embodiment hereinafter detailed the on-sensors other. Figure 1 shows a generally conventional techniques (OCT) optical tomography device configuration are disclosed. (Prior art with differences clearly understand to prior art 1 of not less than 1000 comparing the general prior art construction as well as the present invention.) As in Figure 1 the, general prior art optical tomography (OCT) device a light amplifier (1), number 1 isolator (2), number 2 isolator (3), output optical fiber number 1 (4), a band-pass filter (5), polarizing number control unit (6), fiber delay line (7), current driver (8), any function generator (9) including a as ring competitive exhibition (10); circulator (11), photodiode (12), reflective filter (13) including a trigger signal generating section (20) interferometer 999000018599 9 (30) can be made. Optical amplifier (1) in number 1 isolator (2) to the output optical signals, optical transmitter arranged in the valve timing of the isolator number number 1 (2) by, other uses a template can be discharged. The, current driver (8) and optical amplifier (1) efficiency of generated by light energy can be reduced. Number 1 output optical fiber (4) outputs the optical signal number 2 output optical fiber (14) is, the output signal of the trigger signal generation unit 10 to 20% (20) transmits, 80 to 90% the output signal of the interferometer (30) can be sent. The, interferometer (30) to 100% of the light energy and is not, required for optical tomography levels of laser output is obtained may not be disclosed. The art optical tomography (OCT) device is provided to convert light energy is divided, such as human partner in the retina of the eye structure photographing optical tomography door number thereof can not. However, when industrial object relative optical tomography, interferometer (30) laser output the object is the number of the furnace door can be captured Image is lacking. And then the, booster optical amplifier (BOA) but using, reduces the efficiency of light energy, bear the cost can be high. Figure 2 shows a device according to example of the present invention embodiment of optical tomography (OCT) also are disclosed. As in Figure 2 the, using circulators utilizing reverse output having an optical tomography device includes a trigger signal extraction type ring Laser, current driver (180), current driver (180) to receive a supply used as electrical energy from optical amplifier gain medium (120), optical amplifier (120) receives optical signal from optical signal transmission direction number plower number 1 circulator (110), optical amplifier (120) receives optical signal from optical transmitter arranged in number isolator valve timing (130), isolator (130) wherein the number of the optical signal transmission direction of the optical signal inputted to the optical signal from the optical coupler output with wavelength converting effect (140), output optical fiber (140) receives the optical signal from 999000 0271999 number 1 circulator (110) as the frequency of the optical signal filter that is (150) including a wavelength sweeping light source unit (100); number 1 circulator (110) receives optical signal from, generate a trigger signal trigger signal generation unit (200) and output optical fiber (140) receives optical signal from, a monolayer of interferometer which collects information about the object (300) can be comprising. And, an optical amplifier has a, ring (ring) formed as a light wavelength sweeping resonant circuit (100) direction of number 1 and outputs the rotation direction (150) receives the output signal of the, number 1 number 1 optical amplifier output signal propagating direction (121) of the number 1 and number 2 it is a reverse direction optical amplifier output signal in one direction number 2 (122) can be generate. Wherein, the WDM coupler forward direction it is a direction number 1 (120) from isolator (130) and output optical fiber (140) in the direction of the transmitted optical signal components, the WDM coupler it is a reverse direction number 2 direction (120) from number 1 circulator (110) means the direction of optical signal can be transmitted. Hereinafter, description of all are the same. Unlike the prior art general optical tomography (OCT) on device, using circulators of the present invention having an optical tomography device is utilizing reverse output trigger signal extraction type ring Laser, number 1 of the prior art isolator (2) instead of number 1 circulator (110) is installed, prior art number 2 output optical fiber (14) is in addition to number can be disclosed. Number 1 circulator (110) is, number 2 optical amplifier output signal (122) from the trigger signal generation unit (200) can be outputs. Thus, the optical amplifier output signal in one direction number 2 number 2 (122) has not been a trigger signal generation unit (200) to prevented, optical amplifier (120) optical signal energy can be efficiently used. Wherein, number 1 circulator (110) from optical amplifier (120) the signal sent to the phase number 2 optical amplifier output signal (122) by the number is the same as the wavelength phase, optical amplifier output signal number 2 without loss in energy due to interference phenomena (122) is triggered signal generation unit (200) can be sent to be used. Of the present invention is optical tomography device, output optical fiber (140) selectively receives optical signal optical signal polarization crystal number control unit (160) 2. further the result. Polarizing number control unit (160) is, can be manually steerable, or the generator or by automatic feedback can be automated operation. Polarizing number control unit (160) is, integrated optic niobium lithium (LiNbO3 ) Be a polarizing equipment. The device of the present invention optical tomography, polarizing number control unit (160) to the filter unit (150) is connected between wavelength sweeping light source unit (100) resonant period and filter unit (150) match the driving cycle of fiber delay line (170) than can be made. Of the present invention is optical tomography device, output optical fiber (140) on the interferometer (300) which is located between the, output optical fiber (140) provided to output the optical signal from the interferometer (300) further comprises transmitting booster optical amplifier (BOA) can be done via the disclosed. The present invention light energy efficiency in implementing optical tomography device interferometer (300) in lack of laser output, using selectively booster optical amplifier (BOA) can be. At this time, the prior art's general optical tomography device (OCT) than using a small booster optical amplifier (BOA) can be, in addition increased by at least booster optical amplifier (BOA) using the number may be used in an, low cost and a high efficiency booster optical amplifier (BOA) can be CA. Trigger signal generating section (200) is, number 1 circulator (110) receives optical signal from optical signal transmission direction number plower number 2 circulator (210); number 2 circulator (210) receives optical signal from, optical signal receives reflection filter (230) and number 2 circulator (210) receives light energy converted into electrical energy to optical signal from photodiode (220) can be comprising. Number 2 circulator (210) is, reflective filter (230) optical signal outputs a photodiode (220) can be sent. Trigger signal is, as signal connection portion of an operation start circuit, of the present invention is optical tomography device, trigger signal for generation of a trigger signal generation unit (200) optical signals transmitted optical amplifier output signal number 2 (122) use of an interferometer (300) optical signal can be transmitted to maximize. Interferometer (300) includes, identifying interference pattern of the optical signal comprising a galvanometer plower [...] interferometer and imaging position number can be. Filter unit (150) is, optical fiber-Perot tunable filter (fFP-a tF), Perot variable band pass filter (fP-a tBPF), grating aid orthogonal coupling communication terminal (GAVCCF), fiber grating element (OFG), optical fiber Bragg grating (FBG) or dielectric thin film filter (TFF) one can be formed. Wherein, optical fiber-Perot tunable filter (fFP-a tF) variable band pass filter (fP-a tBPF) by adjusting an interval between the Perot or voids of the oscillation wavelength can be selected. In an alternative embodiment of the present invention embodiment, filter unit (150) optical fiber-Perot tunable filter (fFP-a tF), Perot variable band pass filter (fP-a tBPF), grating aid orthogonal coupling communication terminal (GAVCCF), fiber grating element (OFG), optical fiber Bragg grating (FBG) or dielectric thin film filter (TFF) but that it is possible for forming one is described, composite are not correct. Filter unit (150) is, period and waveform of the optical signal function generator (AFG) any number plower (190) can be with. Any function generator (AFG) (190) a light signal for the number, as well as capable of different function generating specific function as needed. Hereinafter, the present invention in using circulators having an optical tomography device utilizing reverse output trigger signal extraction type ring Laser method is described for operation of less than 1000. To correspond, current driver (180) from optical amplifier (120) can be supplied to electrical energy. Second step, optical amplifier (120) direction from number 1 is the optical signal isolator (130) being transmitted to the, optical amplifier (120) number 1 circulator is the optical signal direction from number 2 (110) can be sent. Third step, isolator (130) outputted from the optical fiber (140) optical signals is sent, number 1 circulator (110) trigger signal generation unit (200) can be optical signals is transmitted. Fourth step, output optical fiber (140) from interferometer (300) or filter (150) can be optical signals is transmitted. Fifth step, filter unit (150) from number 1 circulator (110) can be optical signals is transmitted. In an associate, number 1 circulator (110) from optical amplifier (120) can be optical signals is transmitted. Hereinafter, the present invention in using circulators having an optical tomography device utilizing reverse output trigger signal extraction type ring Laser example of embodiment described the on-sensors other. Figure 3 shows a device of the present invention embodiment example according to laser beam optical tomography also illuminated and tunable spectrum bandwidth graph, Figure 4 of the present invention embodiment example according to number 1 circulator (110) trigger signal generation unit (200) of the optical signal spectrum is transmitted for graph, Figure 5 of the present invention embodiment example according to reflective filter (230) for graph and reflected light spectrum reflected from, according to the example of the present invention embodiment 6 passing through the photodiode (220) electrical signals is converted to oscilloscope measured at graph (oscilloscope) are disclosed. [Embodiment example 1] Optical tomography device of the present invention selected laser sweep tunable laser (Swept Wavelength Tunable Laser, SWTL), optical amplifier (SOA) (120) 250 mA current is put to him. For the lower end of the measurement result of each component such as disclosed. As in Figure 3 the, sweep tunable laser (Swept Wavelength Tunable Laser, SWTL) as 74 nm size spectrum of the bandwidth, the bandwidth spectrum 1271. From 4 nm 1345. 4 nm to an formation. This sensitivity in optical spectroscopy (Optical spectrometer) it has been determined that in 1 nm and - 60dBm. The, booster optical amplifier (BOA) tomography of an object without provided suitable laser output can be obtained were identified. As in Figure 4 the, number 1 circulator (110) trigger signal generation unit (200) as the size of the transmitted optical signal 74 nm, 1271 spectrum of the optical signal. From 4 nm 1345. 4 nm to an formation. This sensitivity in optical spectroscopy (Optical spectrometer) it has been determined that in 1 nm and - 60dBm. As in Figure 5 the, trigger signal generating section (200) of reflective filter (230) the spectrum of the reflected 1284. It has been determined that to 6 nm. This sensitivity in optical spectroscopy (Optical spectrometer) it has been determined that in 1 nm and - 60dBm. (Oscilloscope) as measured at the graph in Figure 6 the oscilloscope, a first trigger signal is wavelength spectrum from left sweep down (downward wavelength sweeping) 1354 device is provided. 1271 from 4 nm. 4 nm formed when changes and, second trigger signal is wavelength spectrum from left sweep device is provided upwardly (upward wavelength sweeping) 1271. From 4 nm 1354. 4 nm when change from a formation. Third from left and when a wavelength of laser trigger signal is detected, the laser wavelength increases from left second trigger signal detected when you been. These are four trigger signal detection is repeated to be coated. The, optical amplifier (120) number 2 generated in the optical amplifier output signal (122) is triggered signal generation unit (200) was successfully transmitted the were identified. In case that the description of the invention which is for example, of the present invention technical idea of the present invention is provided to a person with skill in the art or essential characteristics without changing other form may be understand easily outputted are disclosed. The exemplary embodiment described above are not limited to examples in all of which must not understood to 2000. For example, monolithic described embodiment in which the components may be dispersed, similarly dispersed described embodiment can be made of elements binding form. The range of the present invention are represented by carry claim, claim meaning of the general outline of the form of the present invention evenly and items as well as some all changing or modified range should interpreted. 1: optical amplifier 2: number 1 isolator 3: number 2 isolator 4: number 1 output optical fiber 5: band pass filter 6: polarizing number control unit 7:8 fiber delay line: current driver 9: any function generator 10: as ring competitive exhibition 11: circulator 12: photodiode 13: reflective filter 14: number 2 output optical fiber 20: trigger signal generating section 30: interferometer 100: wavelength sweeping light source unit 110: number 1 circulator 120: optical amplifier 121: number 1 optical amplifier output signal 122: number 2 optical amplifier output signal 130: isolator 140: output optical fiber 150: filter 160: polarizing number control unit 170: fiber delay line 180: current driver 190: any function generator 200: trigger signal generating section 210: number 2 circulator 220: photodiode 230: reflective filter 300: interferometer An embodiment of the present invention provides an optical coherence tomography which is able to efficiently photograph an interior of not only a human body but also an object using light energy, thereby being able to be used for an industrial purpose; and an operating method thereof. According to the present invention, the optical coherence tomography having a ring-laser using reverse output with a circulator for trigger signal extraction includes a wavelength sweeping light source part comprising: an electric current driver; a light amplifier to receive electric energy from the electric current driver and using the same as a gain medium; a first circulator to receive an optical signal from the light amplifier and controlling a direction of transmission of the optical signal; an isolator to receive an optical signal from the light amplifier and restricting the direction of transmission of the optical signal to one direction; an output light coupler to receive an optical signal from the isolator, controlling the transmission direction of the optical signal and changing the wavelength of the optical signal; and a filter part to receive an optical signal from the output light coupler to output the same to the first circulator, and adjusting a frequency of the optical signal. COPYRIGHT KIPO 2016 Using circulators utilizing reverse output trigger signal extraction type ring Laser in having an optical tomography device, current driver, used to receive a supply current driver electrical energy from said optical amplifier gain medium, said optical amplifier receives optical signal from optical signal transmission direction number plower number 1 circulator, optical signal from said optical amplifier receives optical transmitter arranged in number isolator valve timing, receives the optical signal from said optical signal isolator wherein the number of the optical signal transmission direction with wavelength converting effect output optical fiber, said output optical fiber receives optical signal from optical signal and outputs said number 1 receives light emitted from the light source part including a filter wavelength sweeping [...]; receives optical signal from said number 1 circulator, generate a trigger signal trigger signal generating section; and said output optical fiber receives optical signal from, a monolayer of interferometer which collects information object; and comprising, said optical amplifier has a, ring (ring) formed as a light source of a wavelength sweeping said resonant circuit number 1 receives the output signal of said filter in one direction, said number 1 number 1 optical amplifier output signals and said number 1 number 2 it is a reverse direction propagating direction of the light amplifier output signal number 2 in one direction creating ring Laser characterized using circulators utilizing reverse output trigger signal extraction type having an optical tomography device. According to Claim 1, [...] said number 1, said number 2 receives said optical amplifier output signal generating trigger signal is output to the output trigger signal extraction type ring Laser characterized using circulators having an optical tomography device utilizing reverse. According to Claim 1, selectively receives said output optical fiber optical signal optical signal consists of a number control unit further includes a polarization crystal characterized using circulators utilizing reverse output trigger signal extraction type ring Laser having an optical tomography device. According to Claim 3, number is connected between said water level and said polarizing filter, said filter of said light wavelength sweeping resonance period match the drive further comprises a fiber delay line characterized using circulators utilizing reverse output trigger signal extraction type ring Laser having an optical tomography device. According to Claim 1, which is located between said output [...] said interferometer, said interferometer provided to output the optical signal from said output optical fiber transmitting booster optical amplifier (BOA) consists of using circulators characterized further comprises utilizing the reverse output trigger signal extraction type ring Laser having an optical tomography device. According to Claim 1, said trigger signal generation, transmission direction of the optical signal inputted to the optical signal from said number 1 circulator plower number number 2 circulator; said number 2 receives optical signal from circulator, optical signal receives reflection filter; and said number 2 circulator receives light energy converted into electrical energy to optical signal from photodiode; characterized by comprising a reverse output trigger signal extraction type ring Laser using circulators utilizing device having an optical tomography. According to Claim 6, said number 2 [...], said reflective filter outputs a photodiode characterized said optical signal transmission using circulators utilizing reverse output trigger signal extraction type ring Laser having an optical tomography device. According to Claim 1, said interferometry is, identifying [...] interferometer optical signal interference fringe; and imaging position number plower galvanometer; characterized by comprising a reverse output trigger signal extraction type ring Laser using circulators utilizing device having an optical tomography. According to Claim 1, said filter portion is formed, optical fiber-Perot tunable filter (fFP-a tF), Perot variable band pass filter (fP-a tBPF), grating aid orthogonal coupling communication terminal (GAVCCF), fiber grating element (OFG), optical fiber Bragg grating (FBG) or dielectric thin film filter (TFF) forming one of the characterized using circulators utilizing reverse output trigger signal extraction type ring Laser having an optical tomography device. According to Claim 9, said filter portion is formed, period and waveform of the optical signal function generator (AFG) for connection to any number plower characterized using circulators utilizing reverse output trigger signal extraction type ring Laser having an optical tomography device. Using circulators of claim 1 having an optical tomography device utilizing the reverse output trigger signal extraction type ring Laser in operation of the method, step (i) said current driver from supplying electrical power to said optical amplifier; (ii) said number 1 direction from said optical amplifier is the optical signal being transmitted to said isolator, said number 2 direction is the optical signal from said optical amplifier [...] color from said number 1; (iii) said output optical signal is sent from said isolator [...], signals are transmitted from said number 1 circulator generating trigger signal light from said step; said light from said output optical fiber (iv) interferometer or color from the signal from said filter; (v) said number 1 [...] color from the propagation of the optical signal from said filter; and (vi) said number 1 [...] said optical amplifier optical signals transmission step; and comprising, said step (ii) (vi) to said step is repeated the reverse output trigger signal extraction type ring Laser characterized using circulators utilizing device having an optical tomography operation of method.
