High-stability thermostatic controller

Automatic charging platform suitable for multiple small unmanned aerial vehicles

The invention discloses an automatic charging platform suitable for multiple small unmanned aerial vehicles, and belongs to the technical field of electronic equipment. The automatic charging platform structurally comprises a pressure sensing module (1), a single-chip microcomputer control module (2), an annular distributor interface circuit (3), a load identification module (4), an intelligent power-off circuit (5), an inversion driving circuit (6) and a charging system moving module (7). Based on single-chip microcomputer control, the invention mainly aims to provide a wireless charging platform suitable for multiple small unmanned aerial vehicles, when one or more unmanned aerial vehicles are parked on the platform, a charging coil can be automatically moved to the position below one unmanned aerial vehicle, wireless charging is automatically carried out, and when the unmanned aerial vehicles are fully charged, the charging coil is automatically moved to the position below the unmanned ...

Equal-current synthetic high-power constant current power supply circuit

The invention relates to an equal-current synthetic high-power constant current power supply circuit, which belongs to the fields of electronic industry and optical communication. The circuit comprises a voltage reference circuit, a final driving circuit, a soft-start circuit, an anti-surge circuit, a modulation input circuit, a feedback control circuit, a current driving circuit and a control switch; the final driving circuit comprises high-power semiconductor devices and equal-current resistors which are connected in parallel, the equal-current resistors are respectively and correspondinglyconnected in series with drains of the high-power semiconductor devices, output current generated by the high-power semiconductor devices is merged and then flows through a sampling resistor; and thedrains of the high-power semiconductor devices are respectively connected with a cathode of a semiconductor laser, and sources of the high-power semiconductor devices are connected with the sampling resistor ...

High power laser diode driver

Precision thermostatic control laboratory box

The invention provides a sophisticated and constant temperature control experiment box and belongs to the technological field of electronic equipment. The invention consists of an incubator (10) and a constant temperature controller. The incubator (10) comprises an insulation component and a thermal transfer component; the constant temperature controller consists of a temperature setting circuit (1), a temperature measurement circuit (2), a subtraction circuit (3), a PI control circuit (4), a limiting protection circuit (5), a TEC drives circuit (VCCS) (6) and a display circuit (7). The invention has the stable performance and the reliable work; the temperature control accuracy is 0.1 DEG C; the short-term stability is plus or minus 2.6*10<-3> DEG C; the long-term stability is plus or minus 0.024 DEG C; the temperature range at the normal temperature is 10 DEG C to 40 DEG C. The invention can not only be used for providing a constant-temperature environment for active lock-mold fiber laser ...

Driving module for laser pumping source

The invention discloses a driving module for a laser pumping source, and belongs to the technical field of electronic equipment. The driving module mainly structurally comprises a front panel (1), a power output module (3), a delay compensation module (5), a voltage tracking module (6) and the like. During working, the load bearing range of the circuit can be expanded, the load change can be actively adapted, the reaction time of the circuit is shortened, the circuit can stably operate under the high-power condition, and the circuit has the advantages of high safety, high stability, high load adaption speed, sensitive circuit reaction and the like.

Precision thermostatic control laboratory box

The invention provides a sophisticated and constant temperature control experiment box and belongs to the technological field of electronic equipment. The invention consists of an incubator (10) and a constant temperature controller. The incubator (10) comprises an insulation component and a thermal transfer component; the constant temperature controller consists of a temperature setting circuit (1), a temperature measurement circuit (2), a subtraction circuit (3), a PI control circuit (4), a limiting protection circuit (5), a TEC drives circuit (VCCS) (6) and a display circuit (7). The invention has the stable performance and the reliable work; the temperature control accuracy is 0.1 DEG C; the short-term stability is plus or minus 2.6*10<-3> DEG C; the long-term stability is plus or minus 0.024 DEG C; the temperature range at the normal temperature is 10 DEG C to 40 DEG C. The invention can not only be used for providing a constant-temperature environment for active lock-mold fiber laser ...

Ultra-short optical pulse generation system based on pulse width compression technology

The invention relates to an ultra-short optical pulse generation system based on a pulse width compression technology, which belongs to the technical field of optoelectronic equipment and is structurally characterized in that the output end of a seed pulse source (1) is connected with the input end of a pulse width expansion module (2), and the output end of the pulse width expansion module (2) is connected with the input end of an energy pre-amplification module (3); the output end of the energy pre-amplification module (3) is connected with the input end of the multi-channel pulse segmentation module (4), the output end of the multi-channel pulse segmentation module (4) is connected with the input end of the dispersion management module (5), and the output end of the dispersion management module (5) is connected with the input end of the energy amplification module (6). The output end of the energy amplification module (6) is connected with the input end of the pulse coherence superposition ...

High-energy ultrashort pure quartic soliton fiber laser system based on pulse shaping

The invention discloses a high-energy ultrashort pure quartic soliton fiber laser system based on pulse shaping, and belongs to the technical field of optoelectronic equipment. The output end of the seed pulse source (1) is connected with the input end of the power adjustment module (2), the output end of the power adjustment module (2) is connected with the input end of the polarization pulse segmentation module (3), the output end of the polarization pulse segmentation module (3) is connected with the input end of the polarization pulse synthesis module (4), and the output end of the polarization pulse synthesis module (4) is connected with the input end of the spectrum shaping module (5). The liquid crystal spatial light modulator is utilized to design a programmable pulse shaping structure to perform high-order dispersion management in the fiber laser cavity, pure quartic soliton pulse output is realized, and the fiber laser has the advantages of high pulse energy, narrow pulse width ...

Constant current driver of digital semiconductor laser

The invention relates to a constant current driver of a digital semiconductor laser, belonging to the technical field of electronic equipment. The structure of the constant current driver comprises a front panel (1), a central processing unit (CPU) STC89C51 (2), a button input circuit (3), an LED indicating lamp output circuit (4), a serial communication circuit (5), an A/D converting circuit (6), a D/A converting circuit (7), a power feedback circuit (8), a current feedback circuit (9), a time delay soft start circuit (10), a current output circuit (11) and a display module (12). The constant current driver has the output current of 0-2A, adopts negative feedback structure, effectively improves the output stability, and has the short-term stability being lower than 38ppm; two driving ways which are constant current and constant power are provided by the constant current driver, so that the constant current driver is convenient for use on different occasions; the constant current driver ...

High-stability thermostatic controller

The invention provides a high-stability and constant-temperature controller and belongs to the technological field of electronic circuit. The invention comprises a voltage reference circuit (1), a temperature setting circuit (2), a temperature measurement circuit (3), a PI control circuit (4), a limiting protection circuit (5), display circuit (6) and a TEC drive Circuit (7); wherein, the TEC drive Circuit (7) comprises a bridge circuit and a voltage negative feedback circuit. The invention has the strong anti-interference capability, the stable performance, and the reliable work; the invention is suitable for the temperature control of high-power laser diodes to make the diodes work for a long time; the temperature control range is 0 DEG C to 80 DEG C; the short-term stability is 0.02 DEG C; the long-term stability is 0.05 DEG C. Besides the use in the constant temperature control of the high-power laser diodes, the invention can be widely used in other fields of modern technology by adjusting ...

Digital high-power load adaptive constant current driver

The invention discloses a digital high-power load self-adaptive constant current driver, and belongs to the technical field of electronic equipment. The digital high-power load self-adaptive constant current driver mainly structurally comprises a front panel (14), a power output module (3), a delay compensation module (5), a voltage tracking module (6) and the like. The load adaptation range of the circuit is widened, and the circuit has the advantages of being wide in load adaptation range, high in adjusting speed, large in power, high in safety, high in reliability and the like.

Thermostatic controller of digital semiconductor laser

The invention relates to a thermostatic controller of a digital semiconductor laser, which belongs to the technical field of electronic equipment, in particular to an electronic equipment for controlling the refrigeration and constant temperature of a semiconductor freezer. The structure of the thermostatic controller comprises a front panel (1), a semiconductor freezer, a central processing unit (2), a button input circuit (3), an output circuit (4) of an LED indicating lamp, a serial port communication circuit (5), an close adjustable ring which is composed of a temperature measurement circuit (6), an A/D change-over circuit (7), a D/A change-over circuit (8), a voltage power supply circuit (9), a control voltage module (10) of a driving circuit, a power module (11) of the driving circuit, and a display module (12). An automatic controlling algorithm ultimately ensures that the temperature of a controlled object is stabilized at a set value. The range of temperature control setting is ...

Limited thermostat controller with wide voltage consumption based on thermoelectric refrigerating unit

The invention relates to a limited thermostat controller with wide voltage consumption based on a thermoelectric refrigerating unit, belonging to the technical field of electronic technique. The thermostat controller comprises a temperature setting circuit (2), a temperature sampling circuit (4), and a display drive circuit (3) connected with the temperature setting circuit (2) and the temperature sampling circuit (4) through an option switch. The controller is characterized by also comprising a PI control circuit (5), a limited current circuit (6), a power control circuit (7) and a power output circuit (8), wherein after the temperature setting circuit and the temperature sampling circuit are substracted by a subtractor, output signals are transmitted to the PI control circuit (5), the output signals of the PI control circuit are transmitted to the limited current circuit (6) for carrying out current limiting, the current-limited signals are transmitted to the power control circuit (7) ...

Thermostatic controller of digital semiconductor laser

The invention relates to a thermostatic controller of a digital semiconductor laser, which belongs to the technical field of electronic equipment, in particular to an electronic equipment for controlling the refrigeration and constant temperature of a semiconductor freezer. The structure of the thermostatic controller comprises a front panel (1), a semiconductor freezer, a central processing unit(2), a button input circuit (3), an output circuit (4) of an LED indicating lamp, a serial port communication circuit (5), an close adjustable ring which is composed of a temperature measurement circuit (6), an A/D change-over circuit (7), a D/A change-over circuit (8), a voltage power supply circuit (9), a control voltage module (10) of a driving circuit, a power module (11) of the driving circuit, and a display module (12). An automatic controlling algorithm ultimately ensures that the temperature of a controlled object is stabilized at a set value. The range of temperature control setting is ...

Equal-current synthetic high-power constant current power supply circuit

The invention relates to an equal-current synthetic high-power constant current power supply circuit, which belongs to the fields of electronic industry and optical communication. The circuit comprises a voltage reference circuit, a final driving circuit, a soft-start circuit, an anti-surge circuit, a modulation input circuit, a feedback control circuit, a current driving circuit and a control switch; the final driving circuit comprises high-power semiconductor devices and equal-current resistors which are connected in parallel, the equal-current resistors are respectively and correspondingly connected in series with drains of the high-power semiconductor devices, output current generated by the high-power semiconductor devices is merged and then flows through a sampling resistor; and the drains of the high-power semiconductor devices are respectively connected with a cathode of a semiconductor laser, and sources of the high-power semiconductor devices are connected with the sampling resistor ...

Laser pumping source applied to fiber laser

The invention discloses a laser pumping source applied to an optical fiber laser, and belongs to the technical field of electronic equipment. The laser pumping source mainly structurally comprises a laser module (1), a power control module (2), a temperature control module (3), a display driving module (4), a front panel (5) and the like. The circuit can adapt to load change during working, voltage at the two ends of the load can be automatically adjusted, the circuit can work in the highest efficiency state all the time, system loss is reduced, and the application range of the circuit is widened.

Ultra-short pulse fiber laser system based on dispersion regulation and control technology

The invention relates to an ultrashort pulse fiber laser system based on a dispersion regulation and control technology, which belongs to the technical field of optoelectronic equipment, and is structurally characterized in that the output end of a seed pulse source (1) is connected with the input end of a spectrum narrowing module (2), and the output end of the spectrum narrowing module (2) is connected with the input end of a multi-channel pulse time domain segmentation module (3); the output end of the multi-channel pulse time domain segmentation module (3) is connected with the input end of the pulse shaping module (4), the output end of the pulse shaping module (4) is connected with the input end of the multi-channel pulse coherence superposition module (5), and the output end of the multi-channel pulse coherence superposition module (5) is connected with the input end of the pulse width spectrum shaping module (6). The invention has the advantages of high output pulse energy, high ...

Passive mode-locking fiber laser delay feedback chaotization system based on graphene

The invention belongs to the technical field of optical communication devices and relates to a passive mode-locking fiber laser delay feedback chaotization system based on graphene, comprising a pumping laser (1), a wavelength division multiplexing fiber coupler (2), a first fiber coupler (3), a mode-locking device (9), an erbium-doped fiber (7), a polarization controller (5), an isolator (6), a second fiber coupler (4), a photodetector (10), an A/D conversion circuit (11), a single chip microcomputer (15), an RS 232 interface (16) and an optical delay line (12), wherein the optical delay line (12) receives control signals and carries out delay feedback to enable the whole system to be in a chaotization state, and the mode-locking device (9) is a graphene mode-locking device. The invention can generate a femto-second order optical pulse without an external modulation source, has the advantages of easy synchronization, high output pulse peak power, easy installation and operation and simple ...

Ultra-short pulse source for dense wavelength division multiplexing system

The invention relates to an ultrashort pulse source for a dense wavelength division multiplexing system, which belongs to the technical field of optoelectronic equipment and is structurally characterized in that the output end of a seed pulse source (1) is connected with the input end of a pulse width broadening module (2), and the output end of the pulse width broadening module (2) is connected with the input end of a pulse pickup module (3); the output end of the pulse pickup module (3) is connected with the input end of the pulse time domain segmentation module (4), the output end of the pulse time domain segmentation module (4) is connected with the input end of the primary pulse width compression module (5), and the output end of the primary pulse width compression module (5) is connected with the input end of the polarization pulse coherence superposition module (6). And the output end of the polarization pulse coherence superposition module (6) is connected with the input end of ...

Constant current driver of digital semiconductor laser

The invention relates to a constant current driver of a digital semiconductor laser, belonging to the technical field of electronic equipment. The structure of the constant current driver comprises a front panel (1), a central processing unit (CPU) STC89C51 (2), a button input circuit (3), an LED indicating lamp output circuit (4), a serial communication circuit (5), an A/D converting circuit (6), a D/A converting circuit (7), a power feedback circuit (8), a current feedback circuit (9), a time delay soft start circuit (10), a current output circuit (11) and a display module (12). The constant current driver has the output current of 0-2A, adopts negative feedback structure, effectively improves the output stability, and has the short-term stability being lower than 38ppm; two driving ways which are constant current and constant power are provided by the constant current driver, so that the constant current driver is convenient for use on different occasions; the constant current driver ...

Coherent phase detecting method based on Mach-Zehnder interferometer

The invention discloses a coherent phase detecting method based on a Mach-Zehnder interferometer, belonging to the technical field of optical quantity detection. Lasers emitted by a laser source (1) are divided into two paths through a first optical fiber coupler (2) and then are respectively transmitted by a first optical fiber interference arm (4) and a second optical fiber interference arm (5); the first optical fiber interference arm (4) and the second optical fiber interference arm (5) are putted into the same constant-temperature control system; two paths of lasers are combined into one path in a primary phase difference detection process, and the photocurrent intensity Io of the combined laser is detected by using a photoelectric diode detector; the intensities I1, I2 of photocurrents output from the two optical fiber interference arms are respectively detected; and the primary phase difference of the two optical fiber interference arms is calculated by using a formula. The invention ...

High-power spectral width tunable ultrashort pulse generation system

The invention relates to a high-power spectral width tunable ultrashort pulse generation system, which belongs to the technical field of optoelectronic equipment, and is structurally characterized in that the output end of a seed pulse source (1) is connected with the input end of a primary power pre-amplification module (2), and the output end of the primary power pre-amplification module (2) is connected with the input end of a pulse time domain separation module (3); the output end of the pulse time domain separation module (3) is connected with the input end of the Fourier space-time transformation shaping module (4), the output end of the Fourier space-time transformation shaping module (4) is connected with the input end of the secondary power amplification module (5), and the output end of the secondary power amplification module (5) is connected with the input end of the polarization pulse synthesis module (6). And the output end of the polarization pulse synthesis module (6) is ...

High power laser diode driver

This inventive high power diode laser driver is used for driving high power diode laser or diode laser array and providing complete protective units, with its kernel part of voltage controlled current source. The circuit board of the voltage controlled current source consistes of: a voltage reference circuit (1), current-limiting circuit (2), soft starting circuit (3), anti-surge circuit (4), modulation input circuit (5), feed-back control circuit (6) and current driving circuit (7). This inventive negative feedback principle stable output current can provide: constant current driving mode (CCD mode) and constant power driving mode (CPD mode), which CCD mode can preset precisely the working current and limiting current of LD with long duration stability of 38ppm, and which CPD mode can automatically regulate output current to ensure constant power working of LD, and said (2) and (3) provides safety driving of LD.