DISTRIBUTED OPTICAL FIBER SENSOR APPARATUS USING FREQUENCY DOMAIN REFLECTOMETRY OF BRILLOUIN DYNAMIC GRATING AND SENSING METHOD THEREOF
The present invention relates to dynamic grating demultiplexer using an optical fiber sensor arrangement and automobile frequency domain of deflected optical divider depends it counted, [sing[sing] in method provided, particularly the spatial resolution can be enhanced dynamic grating deflected optical divider depends to frequency domain of optical fiber sensor arrangement and it counted, [sing[sing] in method automobile using distribution are disclosed. Dynamic grating deflected optical divider depends (Brillouin dynamic grating; BDG) implies a magnetic recording disk (polarization maintaining fiber; PMF) or another birefringence in the presence of medium in the direction of polarized light waves Brillouin scattering (stimulated Brillouin scattering; SBS) generating sound waves through indicating other. Appropriate phase matching conditions are met is the sound wave, and polarized light waves generating sound waves perpendicular to compensate for the grating to form the reflecting light waves different frequencies at the base. BDG grating used for generating waves of intensity of deflected optical divider depends gain proportional to a gain curve by measuring the reflected light intensity since BDG acquires a deflected optical divider depends its center frequency for detecting frequency can be deflected optical divider depends. Gain curve distribution type measuring time-domain deflected optical divider depends prior art include the pin is deflected optical divider depends frequency analysis techniques. This technique is called BOTDA and, the probe light source optical fiber pump light pulse and continuous oscillation in the opposite direction and proceeds causes incident light waves. Generate pump light and probe overlap portion includes an acoustic optical fiber CLK3 deflected optical divider depends gain signal. Pump light and probe light have the frequency difference between the while, measuring the frequency of the input optical probe acquires deflected optical divider depends gain signal detected by a deflected optical divider depends. In this manner high spatial resolution to obtain pump light from a server to a brief pulse light, corresponding to a brief pulse light is deflected optical divider depends on the gain curve acquire conforms to the broadband frequency components with each other. A wide variety of center frequency thereof is accurately acquired frequency gain curve deflected optical divider depends to be moved between a deflected optical divider depends, used to improve spatial resolution limit flow tides. The other conventional techniques include domestic registration (BDG) time domain analysis deflected optical divider depends posted to Internet route 10 - 1130344 call dynamic grating is separated by disclosed. In this way short pump light to be employed in place after generating the pump used to a magnetic recording disk (PMF) BDG to short probe light incident pump light and the probe light reflection BDG horizontally according to the position measuring method are disclosed. In this manner BDG involved in determining the spatial resolution of only light pump pulse only a long pump light can be used because it does not, the gain curve can be achieved and narrowband deflected optical divider depends, short probe used to simultaneously obtain high spatial resolution tranfectants disclosed. Also, pulse light and continuous wave light traveling to form two pumps for super high vacuum the changing light is bidirectional, as reflectivity of each depending on the position gain which is BDG deflected optical divider depends as shown by the other. By measuring the change in reflection using short probe light, changes in the difference of the frequencies of the two pumps light deflected optical divider depends gain curve can be achieved. However use this technique in order to obtain the higher spatial resolution probe light short pulse light outer surface direction is high bandwidth pulse generator, signal processing using high-speed digitizer motor are disclosed. The present invention is provided to solve the problems such as coil and, solenoid valves capable of higher spatial resolution can take reflection measurements utilizing distribution optical fiber sensor arrangement and dynamic grating frequency domain of deflected optical divider depends it counted, [sing[sing] method pin is provided. In order to achieve the purpose of the dynamic grating reflection measurements utilizing a frequency domain of deflected optical divider depends a pump light generating pump light source distribution optical fiber sensor; the pump and includes a first pump light distributing 1 2 1 preferred first pump light emission and; moving the first single side group modulator and 1 1 of the input optical frequency output; 1 1 2 the first pump light via the single side group modulator second sub-optical axis 1 releasably connected to the first opposite directions the same pump light incident polarization maintaining single-mode fiber; probe modulator is probe light source; the probe and includes a first optical probe 1 2 2 preferred first probe light distributing emission and; the probe light optical axis 1 2 1 the a magnetic recording disk and another in the same direction as the incident pump light in [khyul[khyul] The [ley[ley] sprouts andkuanhsi when; moving the first probe light frequency output 2 [...][...] rice cake [...] 2; 1 the probe light reflected from the dynamic grating formed a magnetic recording disk with respect to the deflected optical divider depends first reflected probe light array for the probe 1 2 1 kuanhsi[khyul[khyul] with output interconnection storehouse total destruction and; light output in the storehouse total destruction detector which; it contains. Preferably the photo detector for processing the signal outputted from the signal processing unit; same signal as, the signal processing unit processes the first pump light frequency difference between the pump light 2 1 1 2 changes in the difference of the frequencies of the probe light and the photo-detector obtained from a probe light deflected optical divider depends transition frequency to detect in the nanometer range. Also, the probe light source with variable wavelength is transmitted through the tunable wavelength laser is received signals. Also, the frequency of the frequency domain of deflected optical divider depends for a dynamic grating reflection measurements utilizing pump light generating pump light generating step and distribution optical fiber sensing method; the pump and includes a first pump light 2 1 pump light distributing and dispensing pump light; the first single in side group modulator 1 1 pump light moves and a frequency output; the second pump light arrays are the first 1 2 pump light a magnetic recording disk and the same as the first optical axis 1 opposite to each other and generating a three-dimensional incident pump light; probe light generating probe light generating and; the probe and includes a first light distributing optical probe 1 probe light distribution and probe 2; 2 2 moved by the probe light frequency and outputs the first single in side group modulator; the a magnetic recording disk and another 2 1 1 which emits an incident optical axis in the same direction as the first pump light and probe light incident probe light; the first reflected light from the first polarization maintaining optical fiber 1 probe from the first probe 2 2 1 probe arrays are single side group modulator array light modulator is via interference interference light generating and; detecting the interference light detection of a; without using a tool. The deflected optical divider depends a dynamic grating reflection measurements utilizing distribution optical fiber sensor arrangement and it counted, [sing[sing] in method frequency domain of the, high spatial resolution can be acquired simultaneously deflected optical divider depends [hyep[hyep] Large [hyek[hyek] gain curve. Also, in order to obtain high spatial resolution without requiring a high speed digitizer brief pulse generator and an engine...copyright 2001. Figure 1 shows a deflected optical divider depends therefore dynamic grating according to frequency domain of distribution optical fiber sensor device surface reflection measurements utilizing exhibit are disclosed. Below, a preferred embodiment of the present invention with reference to the attached drawing dynamic grating reflection measurements utilizing frequency domain of the deflected optical divider depends distribution optical fiber sensor arrangement and it counted, [sing[sing] method more specifically described as follows. Figure 1 shows a deflected optical divider depends therefore dynamic grating according to frequency domain of distribution optical fiber sensor device surface reflection measurements utilizing exhibit are disclosed. The reference also 1, the dynamic grating reflection measurements utilizing a frequency domain of deflected optical divider depends distribution optical fiber sensor device (100) includes a deflected optical divider depends dynamic grating generator (BDG generating section) (110) (OFDR: Optical Frequency Domain Reflectometry measuring section) on optical frequency domain reflectometer measuring section (160) contact with each other. BDG generation unit (110) is a magnetic recording disk (PMF) deflected optical divider depends to generate a dynamic grating to in the nanometer range. BDG generating section (110) of a water pump light source (Pump LD) (111), 1 preferred first exhaust (113), a first single side group modulator 1 (SSBM) (115), optical amplifier (117), a first polarizer 1 (121), a first polarizing splitter 1 (125), first polarization splitter 2 (126) and polarization maintaining fibers (130) contact with each other. (Pump LD) pump light source (111) is continuously oscillating laser light source for emitting continuous wave pump light received signals. 1 preferred first exhaust (113) the pump light source (111) 1 2 pump light to the first first pump light groove 50 percent ratio of 50 distributes pump light outputs. First single side group modulator 1 (115) the microwave generator (141) along 1 moves up or down to the output signals of the input optical frequency outputs. 1 first single side group modulator (115) the microwave generator (141) setting a magnetic recording disk (130) lifts up in frequency by the frequency of the pump light deflected optical divider depends along constant frequency of 1 can be constructed. Optical amplifier (117) is EDFA is received signals. First polarizer 1 (121) 1 transmits a polarized light component of the second optical axis, the first polarization splitter 1 (125) has a polarizing splitter 1 (121) within a body is a magnetic recording disk (130) to advance to, conversely a magnetic recording disk (130) such that the reflected light is in kuanhsi[khyul[khyul] 1 (171) proceeds in such a direction toward the base. The pump light is first storehouse child brush [ley[ley] 2 (127) and 1 polarizing splitter (126) via a magnetic recording disk (130) to the light-emitting surface. Power meter (Power meter) is a magnetic recording disk (130) from isolator (127) direction for monitoring light has been applied, optical amplifier (117) and a second polarizer 1 (121) connected between the first kuanhsi[khyul[khyul] 2 (121) and photodetector (PD) 1 has a polarizer (121) can be avoided and have been applied for monitoring light reflected from the negative disclosed. 2 second polarizer (122) is optical signal and domain reflectometer measuring section (160) of kuanhsi[khyul[khyul] 1 (171) 1 first polarization splitter (125) 2 which is connected between the first polarization axis passing substrate. A magnetic recording disk (130) has a single side group modulator 1 (115) via second sub 1 first pump light (Pump1) 2 (Pump2) first optical axis the same pump light polarization splitter 1 1 to 20c opposite first (126) and a second polarizing splitter 2 (126) and which is connected between the, distribution type sensor functions as a substrate. Optical frequency domain reflectometer measuring section (OFDR: Optical Frequency Domain Reflectometry measuring section) (160) includes a probe light 30 BDG variable frequency generator (110) and reference light reflected from the physical array desired for example temperature or strain measurement to in the nanometer range. Optical frequency domain reflectometer measuring section (OFDR: Optical Frequency Domain Reflectometry measuring section) (160) includes a probe light source (Tunnable Laser) (161), 2 preferred first exhaust (163), first single side group modulator 2 (165), 3 second polarizer (167), the storehouse is bitter [khyul[khyul] the [ley[ley] (171), storehouse total destruction (173), photodetector (180) signal and (DAQ & Signal Processing) (185) contact with each other. Probe light source (161) generates the probe light outputs. Probe light source (161) continuous oscillation light source is received signals. Also, probe light source (161) is the signal processing unit (185) varied by wavelength tunable laser is received signals. 2 preferred first exhaust (163) includes a probe light source (161) 1 (Probe 1) first probe light generated in the first optical probe 2 to 50 to 50 percent (Probe 2) probe light at a substrate. 1 kuanhsi[khyul[khyul] first (171) 1 probe light has a polarization maintaining optical fiber (130) of the first pump light into different optical axis in the same direction as the incident 2 1, a magnetic recording disk (130) first reflected light reflected from the probe 1 multiplexer (173) output to the. First single side group modulator (SSBM) 2 (165) 2 outputs the second probe light frequency moves upward or downward. Preferably single side group modulator (SSBM) 2 (165) also microwave generator (141) depending on the signal outputted from the first frequency equal to the frequency of the optical probe 2 1 pump light outputs are constructed to move. 3 second polarizer (167) 1 2 probe light polarized component has a second axis outputs. storehouse total destruction (173) 1 has a probe for light having a magnetic recording disk (130) reflected from the deflected optical divider depends first dynamic grating formed kuanhsi[khyul[khyul] 1 (171) 1 outputs a first reflected probe light probe first mutual-array light source detector 2 (180) output to the. Photodetector (180) is storehouse total destruction (173) to detect light output, the electrical signal corresponding to light detected signal processing part (185) outputs it. A signal processing unit (185) has a light detector (180) signal outputted from the processing substrate. A signal processing unit (185) has a frequency difference between the first and second probe light 2 1 2 1 pump light pump light probe light frequency difference changes in the photodetector (180) obtained from a transition frequency detected by a deflected optical divider depends. Wherein, the size of the first reflected light probe 1 1 2 first pump light by dynamic grating reflectivity of deflected optical divider depends between first pump light deflected optical divider depends gain proportional to the other. The, signal processing unit (185) 1 has a first frequency difference between pump light 2 have the pump light interval while, by measuring the intensity of the second reflected light measurement probe 1 OFDR, deflected optical divider depends position can be obtained by an in-gain curve for detecting frequency can be deflected optical divider depends. The signal processing unit (185) probe light has a wavelength in a low frequency changes in the detecting position through the signal Fourier transform (Fourier Transform) reflectance information other. Such it counted, [sing[sing] systemit counted, [sing[sing] process is less than the described substrate. First, pump light source (111) 1 preferred pump light is generated in exhaust (113) 1 2 pump light first pump light via the first dispensed thereon. Then, pump light is first side group modulator 1 1 (115) arrays are by and, second pump light polarized first pump light arrays are 1 2 maintaining fibers (130) 1 light-emitting optical axis of the same as the first opposite directions. During this process deflected optical divider depends dynamic grating is a magnetic recording disk (130) in generated. On the other hand, a pump light (161) 2 preferred probe light is generated in exhaust (163) first probe light optical probe 1 2 via first dispensed thereon. And, 2 probe light is first single side group modulator 2 (165) is a frequency are confirmed each other. Also, a magnetic recording disk (130) first optical axis equal direction 1 1 2 other probe light is input to the second pump light, 1 1 2 first reflected light from the first polarization maintaining optical fiber probe from the first probe single side group modulator (165) 2 via the first probe light arrays are generated by interference light by the optical detector array (173) detected by a. First polarization maintaining fibers 1 1 2 pump light emitted from the first probe light is light include light emitting diodes of the polarization axis direction advances to a second pump light incident polarization axis 1. 2 preferred first exhaust (163) of the other arm 2 that has passed the first probe light is single side group modulator (SSBM) 2 (165) 1 as it passes through a first pump light used in frequency by a change in frequency of reference light (reference light) CLK3 lifts up. Also, a magnetic recording disk (130) first probe the reflected light is generated in the first polarization splitter 1 1 (125) 1 kuanhsi[khyul[khyul] first (171) and selects a multiplexer (173) interfered with the reference light through light detector (PD) (173) detected by means of a substrate. Photodetector (PD) in detected signals are the aforementioned signal processing unit (185) processing with each other. 1 first pump light deflected optical divider depends on the frequency of a predetermined region in stages around a frequency measurement of changes in the angular position repeatedly deflected optical divider depends obtain gain curves. The substrate includes a optical fiber sensor device includes a time domain assays replaced frequency measurement process (optical frequency domain reflectometry; OFDR) method (BDG provided OFDR) not used in both continuous wave pump light and probe light pulse light as waves do not use high speed digitizer...copyright 2001. Also, the apparatus includes a high frequency converter having higher spatial resolution using OFDR BDG gain curve can be acquired simultaneously narrowband signals of the deflected optical divider depends. Also, the variation of frequency or the strain acting on the deflected optical divider depends linearly dependent on the changes, a device and a method having high spatial resolution or the distribution optical fiber sensor can be useful as for talking book. 111: pump light source 113:1 preferred first exhaust 115:1 117 first single side group modulator: optical amplifier 121:1 second polarizer 125:1 splitter first polarization 126:130 first polarization splitter 2: a magnetic recording disk 161: probe light source 163:2 preferred first exhaust 165: first single side group modulator 167 2:3 first polarizer 171:173 the storehouse is bitter [khyul[khyul] the [ley[ley]: storehouse total destruction 180: photodetector 185: signal processing unit The present invention relates to a distributed optical fiber sensor apparatus using frequency domain reflectometry of a Brillouin dynamic grating. The distributed optical fiber sensor apparatus using frequency domain reflectometry of a Brillouin dynamic grating comprises: a pump light source to generate pump light; a first light distributor to distribute the pump light into first pump light and second pump light; a first single side wave modulator to move a frequency of the first pump light to output the first pump light; polarization maintaining optical fiber connected to allow the first and the second pump light propagating through the first single side wave modulator to enter an identical first optical axis in opposite directions; a probe light source to generate probe light; a second light distributor to distribute the probe light into first probe light and second probe light; an optical circulator to allow the first probe light to enter a different second optical axis of the polarization maintaining optical fiber in a direction identical to the first pump light; a second single side wave modulator to move a frequency of the second probe light to output the second probe light; an optical multiplexer to multiplex the second probe light and first probe reflection light reflected from a Brillouin dynamic grating formed in the polarization maintaining optical fiber for the first probe light to be outputted to a first optical circulator; and a photodetector to detect light outputted by the optical multiplexer. According to the distributed optical fiber sensor apparatus using frequency domain reflectometry of a Brillouin dynamic grating and a sensing method thereof, high spatial resolution and a narrowband Brillouin gain curve can be simultaneously acquired. Also, a short pulse generator and a high speed digitizer are not required to obtain high spatial resolution to simplify a structure. COPYRIGHT KIPO 2017 A pump light source generating pump light; the first pump light 1 2 1 preferred first pump light distributing first pump light emission and; 1 moves the second pump light output frequency of single side group modulator and 1; 1 1 2 the first pump light via the single side group modulator second sub-pump light incident optical axis 1 releasably connected to the first opposite directions the same polarization maintaining single-mode fiber; probe modulator is probe light source; the probe and includes a first optical probe 1 2 2 preferred first probe light distributing emission and; the probe light optical axis 1 2 1 the a magnetic recording disk and another in the same direction as when the pump light incident in kuanhsi[khyul[khyul] The [ley[ley] sprouts and; moving the first single side group modulator and 2 2 probe light frequency output; 1 the probe light reflected from the dynamic grating formed a magnetic recording disk with respect to the deflected optical divider depends first reflected probe light in the array output [khyul[khyul] withkuanhsi probe 1 2 other storehouse total destruction and; light output in the storehouse total destruction detector which; characterized by comprising a dynamic grating reflection measurements utilizing frequency domain of deflected optical divider depends distribution optical fiber sensor device. According to Claim 1, the photo detector for processing the signal outputted from the signal processing unit; same signal as, the signal processing unit processes the first pump light frequency difference between the pump light 2 1 1 2 changes in the difference of the frequencies of the probe light and the photo-detector obtained from a probe light deflected optical divider depends transition frequency dynamic grating toward the deflected optical divider depends automobile using distribution characterized frequency domain of optical fiber sensor device. According to Claim 1, the probe light source with variable wavelength is transmitted through the tunable wavelength laser is characterized by applying a dynamic grating reflection measurements utilizing frequency domain of deflected optical divider depends distribution optical fiber sensor device Pump light generating pump light generating step and; the pump and includes a first pump light 2 1 pump light distributing and dispensing pump light; moving the first single in side group modulator 1 1 pump light output and a frequency; the second pump light arrays are the first 1 2 pump light a magnetic recording disk and the same as the first pump light incident optical axis 1 opposite to each other and generating a three-dimensional; probe light generating probe light generating and; the probe and includes a first light distributing optical probe 1 probe light distribution and probe 2; 2 2 moved by the probe light frequency and outputs the first single in side group modulator; the a magnetic recording disk and another 2 1 1 which emits an incident optical axis in the same direction as the first pump light and probe light incident probe light; 1 1 probe from the first probe light reflected from the polarization maintaining fibers first via the first probe light arrays are single side group modulator 2 2 array interference interference light generating and generates light; the interference light detecting step for detecting light; characterized by comprising a dynamic grating reflection measurements utilizing frequency domain of deflected optical divider depends distribution optical fiber sensing method.
