197 results about "Arbitrary waveform generator" patented technology

The invention discloses a multi-sideband chirp modulation DAS system and a working method thereof, and relates to the technical field of distributed sound wave sensing. The DAS system comprises a narrow linewidth laser, an optical fiber coupler, a phase modulator, an electro-optical modulator, an erbium-doped optical fiber amplifier, an optical fiber circulator, a dense wavelength division multiplexer, a photoelectric balance detector, a data acquisition card, an arbitrary waveform generator, a direct current source and the like. The phase modulator is used for modulating constant-amplitude multi-frequency continuous light, the frequency number of light waves is related to the harmonic number of a microwave modulation signal, the frequency interval is determined by the fundamental frequency of the microwave modulation signal, the continuous light frequency can be flexibly modulated by adjusting the microwave modulation signal, and the modulation bandwidth is large; detected beat frequency signals are compressed into single-frequency signals through pulses, phase information of the single-frequency signals is demodulated, vibration signals along the sensing optical fiber can be detected, the spatial resolution of the system depends on the chirp frequency sweeping range, and the spatial resolution is high.

The invention provides an arbitrary waveform generator multi-chip DAC synchronization system, a delay adjustment module comprises an FPGA chip, an integrated clock management chip and a plurality of DAC chips, and the FPGA chip provides digital signals needing to be converted into analog waveforms for the DAC chips and sends parameter configuration signals to the integrated clock management chip and the DAC chips; the integrated clock management chip generates a reference clock, generates a sampling clock based on the reference clock, distributes the sampling clock to the DAC chip and the FPGA chip, and distributes a synchronization signal to the DAC chip; the multiple DAC chips are all configured to be slave chips to form multiple paths of arbitrary waveform generator output channels, digital signals are synchronously converted into analog signals, the analog signals are processed by a conditioning circuit and then output, the circuit structure of the system is remarkably simplified, synchronization of the multiple DAC chips can be achieved only through one integrated clock management chip, and the system is simple in structure, convenient to use and high in practicability. In addition, delay adjustment between DAC chips can be flexibly achieved, calibration or alignment of circuits and devices is not needed, and good application effects are achieved.

The invention discloses a microwave reflectometer system. An arbitrary waveform generator generates a microwave signal through an X-Ku signal source unit; the coaxial directional coupler divides the generated microwave signal into two paths, one path enters the transmitting unit, and the other path enters the reference unit; a microwave signal entering the transmitting unit is transmitted into the plasma through a fundamental mode rectangular waveguide in the transmitting circuit; the microwave signal entering the reference unit is subjected to flight time compensation through a delay line and then is mixed with a reflected signal received by the receiving unit in a balanced mixer; the calibration unit carries out secondary frequency mixing on the dispersion calibration voltage-time curve signal and the signal obtained after primary frequency mixing of the balanced frequency mixer so as to eliminate dispersion interference; the acquisition card acquires an output signal after secondary frequency mixing of the calibration unit. The system can be integrated with an ion cyclotron resonance antenna, the inherent defects of large attenuation and high dispersion of a long-distance fundamental mode waveguide are overcome, and a high-frequency fundamental mode waveguide through-wall scheme meeting ultrahigh vacuum performance index requirements is realized.

The invention provides a co-path optical path laser ranging system and method for correcting an absolute distance based on a phase method. An arbitrary waveform generator is adopted to perform frequency modulation on a laser signal of a semiconductor laser; the object light and the reference light reflected by the optical fiber collimation unit are transmitted in a common-path manner, and are transmitted to the processor through the loop unit, the photoelectric detector and the data collector; the processor extracts a beat frequency signal of the interference light, obtains an absolute distance according to a frequency modulation continuous wave distance measurement principle, obtains an updated absolute distance after a target moves, and calculates a phase difference to obtain a relative distance measurement value based on an intensity signal of the interference light corresponding to a position before and after the target moves; and correcting the absolute distance measured twice by using the relative distance measurement value to obtain the corrected twice absolute distance. The advantages of a frequency difference method and a phase difference method are combined, a high-precision measurement result can be obtained, the problem of phase ambiguity can be avoided, and precision requirements and measurement requirements of different occasions can be met.

The invention belongs to the technical field of optical fiber distributed sensing, and discloses a distributed optical fiber acoustic sensing device and method based on a linear frequency modulation pulse sequence, and the device comprises a narrow linewidth laser, a double-parallel Mach-Zehnder modulator, and an arbitrary waveform generator. The arbitrary waveform generator is connected with the double-parallel Mach-Zehnder modulator and is used for generating a linear frequency modulation pulse sequence comprising a plurality of pulses of which the center frequencies are sequentially increased or decreased to drive the double-parallel Mach-Zehnder modulator; laser emitted by the narrow linewidth laser is divided into two parts, one part serves as reference light, the other part serves as signal light and is modulated into a linear frequency modulation pulse sequence through the double-parallel Mach-Zehnder modulator, then the linear frequency modulation pulse sequence is output to the sensing optical fiber, Rayleigh back scattering light generated in the sensing optical fiber interferes with the reference light, and the signal light is output to the optical fiber. An interference signal is detected by a balanced photoelectric detector and then is collected by a collection card. According to the invention, high-resolution and large-measurement-range dynamic strain measurement can be realized.

The invention discloses a TGD-OFDR / OCC-BOTDR integrated multi-parameter sensing system and a working method thereof, and relates to the technical field of optical fiber sensors. The multi-parameter sensing system comprises a laser, an optical fiber coupler, an electro-optical modulator, an optical fiber circulator, an optical fiber Bragg grating, an acoustic optical modulator, an erbium-doped optical fiber amplifier, a random scrambler, a piezoelectric ceramic tube, a heating vessel, a delay optical fiber, a photoelectric balance detector, a filter and detector, a data acquisition card, a polarization controller, a direct-current power supply and a microwave source. An arbitrary waveform generator and the like. According to the invention, multiple parameters can be represented at the same time, the measuring speed is fast, and the sampling rate of the system can be effectively improved under the condition that sensing parameters are the same; the method has the advantage of high spatial resolution; the sensor has the advantages of high fusion and low cost, can realize simultaneous measurement of vibration and temperature / strain through single sensing, and is high in fusion and effective in cost control.

Techniques are provided for calibrating a signal current in a radio frequency signal generator system, such as an arbitrary waveform generator system. An apparatus includes a current measurement circuit and a current imbalance correction circuit. The current measurement circuit is configured to measure a first current in a first signal path of the radio frequency signal generator and to measure a second current in a second signal path of the radio frequency signal generator during a calibration process. The current imbalance correction circuit is configured to adjust a current level in at least one of the first signal path and the second signal path of the radio frequency signal generator to correct an imbalance between the measured first current and the measured second current.

The invention relates to the technical field of photoelectronics, and discloses a chirp parameter measuring device and method based on a directly modulated laser optical module, and the device comprises an arbitrary waveform generator, an optical module, a tunable dispersion compensation module, and an oscilloscope. The optical module comprises a directly modulated laser; the output of the arbitrary waveform generator is electrically connected with the radio frequency input port of the directly modulated laser; the output optical signal end of the directly modulated laser is connected with the input optical end of the adjustable dispersion compensation module; the adjustable dispersion compensation module is used for controlling dynamic switching between a zero dispersion state and a preset non-zero dispersion state by introducing dispersion into a link, and an output optical signal port of the adjustable dispersion compensation module is optically connected with a receiving port of the optical module; and the radio frequency output end of the optical module is electrically connected with the oscilloscope. According to the invention, the problems of long chirp parameter test time and high measurement cost in the prior art are solved, and the chirp parameter measurement method has the characteristic of being capable of realizing rapid and accurate chirp parameter measurement.

The utility model discloses a distributed sound wave sensing system for multi-frequency pulse modulation, and relates to the technical field of distributed sound wave sensing. The system comprises a narrow linewidth laser, an optical fiber coupler, a polarization-maintaining optical isolator, an acousto-optic modulator, a polarization-maintaining delay optical fiber, an erbium-doped optical fiber amplifier, a polarization-maintaining dense wavelength division multiplexer, an optical fiber circulator, an optical fiber Bragg grating, a piezoelectric transducer, a polarization controller, a photoelectric balance detector, a data acquisition card, an arbitrary waveform generator and the like. According to the utility model, the multi-frequency delay ring is utilized to carry out multi-frequency modulation, the frequency number of light waves is increased along with the circulation times of the light waves in the delay ring, and under the condition that the utilization of a large-bandwidth electro-optical modulator is not increased, the flexible modulation of the frequency is realized by utilizing a low-bandwidth acousto-optical modulator without being influenced by carrier frequency and sidebands of each order; the low-bandwidth acousto-optic modulator is used for frequency modulation in the multi-frequency delay ring, and compared with an electro-optical modulation or multi-acousto-optic / multi-light source modulation scheme, the modulation cost is effectively saved.

The invention relates to the technical field of integrated circuit testing, and discloses a method and equipment for scanning a voltage and current flip point of a chip, and the method comprises the following steps: an upper computer completes parameter configuration and wave table loading and then sends a starting instruction, a global synchronization unit generates a synchronization signal, and the synchronization signal is sent to a chip; the random waveform generator is started in parallel for scanning, the trigger unit is started for monitoring, the internal counter is started for timing, when the trigger unit monitors overturning, a stop signal is sent, the global synchronization unit latches a count value immediately, and finally, the upper computer reads the count value and calculates an overturning point value in combination with a wave table rate and a clock period. According to the invention, the global synchronization unit is used for coordinating the parallel hardware architecture of the arbitrary waveform generator and the trigger unit, so that the continuous scanning of the excitation signal and the real-time monitoring of the response signal can be autonomously operated on the hardware level, and the overall time consumption of a single flip point test is greatly shortened.

The invention provides a device capable of quickly and flexibly regulating and controlling the central wavelength of an ultrashort light pulse, which relates to the technical field of optics and consists of a mode-locked laser, a Mach-Zehnder interferometer based on phase modulation, an arbitrary waveform generator and a polarization dependent isolator. The mode-locked laser is used for providing a stable single pulse; the Mach-Zehnder interferometer based on phase modulation is used for regulating and controlling the relative phase between pulses; the arbitrary waveform generator is used for providing an electric signal for modulation; and the polarization dependent isolator is used for enabling the polarization states of the two pulses to be consistent. According to the invention, the efficiency and flexibility of adjusting the central wavelength of the spectrum can be improved.

The utility model relates to a signal generation device, an analog-digital hybrid test board card and a test machine, a read-write control module reads an original waveform from a storage device according to a received read request instruction, and returns the read original waveform to an arbitrary waveform generator; the arbitrary waveform generator receives the original waveform and outputs a reconstructed waveform matched with the frequency of a sampling clock of the digital-to-analog conversion device to the first communication module. And the second communication module is connected with the first communication module, and the reconstructed waveform is received by the second communication module and then is transmitted to the digital-to-analog conversion device. According to the technical scheme, the reconstructed waveform can be generated by resampling the original waveform, the external clock chip outputs the sampling clock with the fixed frequency to the digital-to-analog conversion device, digital-to-analog conversion can be completed, the external clock chip does not need to adjust the frequency of the sampling clock, the hardware requirement for the external clock chip and the digital-to-analog conversion device is low, and the design cost is reduced.

The invention belongs to the technical field of intelligent sensors, and particularly relates to a high-precision area array 4D imaging optical method and system based on coherent detection. The method specifically comprises the following steps of: generating a step frequency signal by using an arbitrary waveform generator, loading the step frequency signal on an electro-optical modulator, and modulating a light beam output by a laser; the modulated laser is divided into reflected light and reference light, and the reflected light is reflected by an object to be detected and then enters the area array optical imaging device together with the reference light; the area array optical imaging device comprises a space bridge and a CCD (Charge Coupled Device) photosensitive area, the space bridge splits incident light into four paths through beam splitting control, and the space bridge regulates and controls the polarization state of the incident light, so that a phase difference exists between reference light and reflected light in each path of light beam; coherent processing is carried out on multiple frames of voltage data in each pixel, and the linear frequency modulation rate is calculated; and calculating the speed and position of each pixel target based on the linear frequency modulation rate to realize 4D high-precision imaging of the target.

The long-distance frequency-broadening distributed optical fiber sensing system comprises a narrow linewidth laser, an optical fiber isolator, a dense wavelength division multiplexer, an optical fiber coupler, a continuous optical amplifier, a narrow-band filter, an acoustic optical modulator, an optical fiber circulator, a balance detector, an acquisition card and an upper computer, a segment of mode division multiplexing pulse sequence is obtained by selecting a narrow linewidth laser and controlling an arbitrary waveform generator. After the pulse sequence enters the to-be-measured optical fiber, a section of Rayleigh backscattered light is returned, and system original data is obtained after frequency beating with local light. And then signals are demodulated by using a compensation method, and undesired signals are suppressed successively, so that the problem of limited spurious-free dynamic range caused by phase mismatching of different modes is solved.

The invention provides a pulse laser calibration-based high-precision laser ranging system and method. The system comprises a ranging light path and a calibration light path, in the distance measurement light path, an arbitrary waveform generator performs frequency modulation on a laser signal of a semiconductor laser, the laser signal is divided into two beams through an optical fiber coupler, the two beams are respectively incident to a distance measurement unit and a calibration light path, and the distance measurement unit transmits the laser signal to a target for distance measurement; in the calibration light path, a pulse laser emits frequency calibration laser, the frequency calibration laser is transmitted to a second optical fiber coupler, and the frequency calibration laser is coupled with the laser signal to obtain a frequency mixing light signal; and the processor obtains a distance measurement result based on the distance measurement signal, determines a change curve of the laser signal frequency along with time based on the frequency calibration laser, obtains a non-linear quantity of frequency modulation, and calibrates the distance measurement result based on the non-linear quantity of frequency modulation. The pulse laser is used for calibrating the output frequency of the semiconductor laser, the distance measurement result is corrected, and the distance measurement precision is improved.

The invention discloses an OCC-BOTDA / TGD-OFDR fusion system capable of simultaneously measuring multiple parameters and a working method of the OCC-BOTDA / TGD-OFDR fusion system, and relates to the technical field of optical fiber sensors. The system comprises a narrow linewidth laser, an optical fiber coupler, an electro-optical modulator, an optical fiber circulator, a polarization maintaining fiber bragg grating, a semiconductor optical amplifier, a random scrambler, a delay optical fiber, an erbium-doped optical fiber amplifier, an adjustable grating filter, an optical attenuator, a photoelectric balance detector, a photoelectric detector, a data acquisition card, an arbitrary waveform generator, a direct-current power supply and the like. According to the integrated OCC-BOTDA system and the TGD-OFDR system provided by the invention, simultaneous detection of vibration and temperature / strain along the line can be simultaneously realized through a single sensing optical fiber; the device has the advantages of high fusion degree and low cost, cross aliasing and power competition between pulse light are effectively avoided, and simultaneous measurement of multiple parameters is achieved; the system is high in fusion degree and low in cost.

A system comprises a digitally programmable frequency chirp generator configured to generate a frequency chirp, an attenuator coupled to the digitally programmable frequency chirp generator and a directional device integrated into a cryogenic circuit configured to control superconducting qubits and coupled to the digitally programmable frequency chirp generator. The directional device comprises a main arbitrary waveform generator and an on-chip programmable self-interference canceller.

The invention discloses an optical time domain reflectometer based on ring structure modulation and a working method thereof, and relates to the technical field of optics. The optical time domain reflectometer comprises a laser, an optical fiber coupler, a semiconductor optical amplifier, an acoustic optical modulator, an optical isolator, a delay optical fiber, an erbium-doped optical fiber amplifier, a dense wavelength division multiplexer, a circulator, a Raman laser, piezoelectric ceramics, an arbitrary function generator, an arbitrary waveform generator, a polarization controller, a photoelectric balance detector, a data acquisition card, a computer and the like. Multi-frequency modulation is carried out based on an annular structure, the multi-frequency modulation range is only limited by the bandwidth of a detector and the sampling rate of an acquisition card, a pulse sequence is generated through modulation of the optical annular structure, dependence on the bandwidth performance of a microwave signal source and a modulator is reduced, and the bandwidth is improved; and by injecting the Raman light, the sensing distance is also increased, the equipment cost is effectively controlled, and meanwhile, a new scheme is provided for time sequence pulse sequence modulation.

A technique for calibrating signal currents in a radio frequency signal generator system, such as an arbitrary waveform generator system, is provided. The device includes a current measurement circuit and a current imbalance correction circuit. The current measurement circuit is configured to measure a first current in a first signal path of a radio frequency signal generator and a second current in a second signal path of the radio frequency signal generator during a calibration process. The current imbalance correction circuit is configured to adjust a current level in at least one of the first signal path and the second signal path of the radio frequency signal generator to compensate for an imbalance between the measured first current and the measured second current.

The invention provides a wide-tuning high-power microwave signal generation device and method, and the device comprises a laser, an acousto-optic modulator, a signal generator, an electro-optic intensity modulator, an arbitrary waveform generator, an all-fiber amplifier, a Pockels box, a solid-state amplifier, a photoconductive semiconductor switch, and a bias voltage source. The acousto-optic modulator is respectively connected with the laser, the signal generator and the electro-optic intensity modulator, the electro-optic intensity modulator is respectively connected with the acousto-optic modulator, the arbitrary waveform generator and the all-fiber amplifier, and the Pockels box is respectively connected with the all-fiber amplifier and the solid-state amplifier. And the photoconductive semiconductor switch is respectively connected with the solid-state amplifier and the bias voltage source. The invention provides a wide-tuning high-power microwave signal generation device and method, which are used for solving the problems that the frequency of a microwave signal generated by an existing vacuum electronic device is difficult to change quickly and the size between the vacuum electronic devices is heavy.

The invention discloses a radar interference and safety communication integrated system based on photonics, which comprises an optical signal generation unit, an arbitrary waveform generator module, a signal integrated processing unit and a signal transmission unit, and is characterized in that the optical signal generation unit is used for generating carrier suppression double-sideband optical signals; the arbitrary waveform generator module is used for generating a driving signal for driving the in-phase quadrature modulator module, and the driving signal comprises an encrypted OFDM signal and an LFM signal for radar interference; the signal integrated processing unit is used for combining the driving signal and the carrier suppression double-sideband optical signal, and generating and outputting an integrated optical signal; and the signal transmission unit is used for converting the optical signal into an electric signal to realize signal transmission. According to the technical scheme, radar interference and safe communication can be achieved in the same transmission system at the same time, and due to photon transmission, the transmission system is wide in bandwidth, low in loss and high in anti-electromagnetic interference capacity.

The invention relates to the technical field of satellite communication, and discloses a multiband local oscillator signal generation system and method, and the system comprises a laser, an optical splitter, a first optical modulator, a second optical modulator, an arbitrary waveform generator, an optical coupler, and a signal generation module. The optical splitter divides an optical carrier generated by the laser into first carrier light and second carrier light; the arbitrary waveform generator converts the digital signal into a digital baseband signal to be modulated; the first optical modulator modulates the first baseband signal to the first carrier light to obtain a first optical frequency comb; a second optical modulator modulates a second baseband signal to second carrier light to obtain a second optical frequency comb; the optical coupler couples the first optical frequency comb and the second optical frequency comb into a laser signal; the signal generation module converts the laser signal into a local oscillator millimeter wave signal. Dual-coherent optical frequency combs with different comb tooth intervals are generated through modulation of digital signals with different bit rates, tuning of local oscillation signals is achieved, and the requirement for multi-frequency local oscillation is met.

The invention discloses a polarization adjusting device and a polarization adjusting method. The polarization adjusting device comprises a light source assembly, a micro-ring resonant cavity, a photoelectric detector, a digital oscilloscope, an arbitrary waveform generator and a power meter module. The light source assembly comprises a light source, a scanning module and a polarization controller connected with the transmission end of the light source. The micro-ring resonant cavity comprises a first output part and a coupling part coupled with the polarization controller. The photoelectric detector is connected with the first output part. The digital oscilloscope comprises a first input part and a second input part used for receiving an electric signal output by the photoelectric detector, and the digital oscilloscope can display the trough of the Lorentz curve. The arbitrary waveform generator includes a second output portion and a third output portion. The second output part is connected with the light source. The third output part is connected with the first input part. The power meter module is connected with the scanning module. According to the polarization adjusting device and the polarization adjusting method, the light source assembly can be quickly and efficiently adjusted to be in the TE polarization state or the TM polarization state.

The invention provides a waveform agility high-power microwave generation system based on time reversal and a working method. The system comprises a computer, an arbitrary waveform generator, a first broadband power amplifier, m second broadband power amplifiers, a first time reversal pulse compression cavity, m second time reversal pulse compression cavities, a power divider, a high-speed sampling oscilloscope, m phase shifters, m directional couplers and m radiation antennas. The computer is connected with the arbitrary waveform generator, the high-speed sampling oscilloscope, the phase shifter and the directional coupler; the arbitrary waveform generator is connected with the high-speed sampling oscilloscope through the first time reversal pulse compression cavity on one hand, and is connected with an input port of the power divider through the first broadband power amplifier on the other hand. And m output ports of the power divider are sequentially connected with the radiating antenna through the corresponding second broadband power amplifier, the second time reversal pulse compression cavity, the phase shifter, the directional coupler and the radiating antenna. According to the invention, high-universality broadband internal waveform agility high-power microwave pulse generation can be realized.

The application provides a response measuring device for amplitude and phase of a nanoresonator. The response measuring device comprises: an arbitrary waveform generator for generating a first waveform signal and a second waveform signal; a nanoresonator for generating a vibration signal; a first radio frequency power divider for transmitting an equalized first vibration signal to a first signal path and a second vibration signal to a second signal path; a first processing module for multiplying the first vibration signal with the first waveform signal, filtering high frequency components in a first resultant signal, and obtaining an I(t) signal; a second processing module for multiplying the second vibration signal with the second waveform signal, filtering high frequency components in a second resultant signal, and obtaining a Q(t) signal; and a signal acquisition system for determining an amplitude signal and a phase signal of the nanoresonator according to the I(t) signal and the Q(t) signal. The application can replace a vector network analyzer to obtain the amplitude signal and the phase signal of the nanoresonator.

The invention provides a coherent optical time domain reflection sensing device and a method thereof, and relates to the technical field of distributed optical fiber acoustic wave detection. The device comprises a light source, a 1 * 2 coupler, a control and signal processing unit, an arbitrary waveform generator, a double-path parallel Mach-Zehnder electro-optical modulator, a reference arm optical fiber, an erbium-doped optical fiber amplifier, an optical filter, a circulator, a sensing optical fiber, a 90-degree optical mixer, a photoelectric detector and a data acquisition card. A detection light sequence containing positive and negative frequency shift light pulse sequences is injected into a sensing optical fiber, returned signal light which carries light phase information of each detection point and has superposed frequencies is mixed with local reference light, signal separation is achieved after the signal light is multiplied by complex factors corresponding to each frequency shift pulse and integration of a periodic integral multiple window is carried out, and the detection point light phase information is obtained. And optical phase information demodulation is carried out, and then fusion of detection results of optical signals of various frequencies is carried out, so that high-sampling-rate sensing of acoustic vibration is realized.

The application provides a frequency-modulated continuous wave laser radar system and relates to the technical field of laser radar.The frequency-modulated continuous wave laser radar system comprises a laser, an arbitrary waveform generator, an upper computer, a collection card, a lens, a first optical beam splitter, a linearity correction unit and a detection unit.The linearity correction unit comprises a second optical beam splitter, a delay line, a first coupler and a first balanced detector.The detection unit comprises a third optical beam splitter, a coaxial transceiving grating, a second coupler and a second balanced detector.The frequency-modulated continuous wave laser radar system improves the signal-to-noise ratio and the energy efficiency of the edge field of view, uses the coaxial transceiving grating to replace the circulator, eliminates the near-distance detection blind area of the radar system caused by the internal reflection of the circulator, integrates the linearity correction unit, performs real-time correction or monitoring on the frequency modulation of the laser, enhances the stability of the radar system, and does not need to build any additional optical circuit.

The present invention discloses a quantum measurement and control system, a quantum computer, a system, a network and a communication method. The quantum measurement and control system includes: at least one arbitrary waveform generator and at least one quantum analyzer, wherein the arbitrary waveform generator is used to receive the waveform control parameters transmitted from the host computer, generate the required arbitrary wave data according to the waveform control parameters, perform digital-to-analog conversion on the arbitrary wave data, generate the corresponding analog signal and transmit it to the quantum chip; and / or the quantum analyzer is used to collect the radio frequency analog signal of the quantum chip, perform analog-to-digital conversion on the collected radio frequency analog signal to obtain the corresponding digital signal, extract the amplitude and phase data of the preset frequency point in the spectrum corresponding to the digital signal, and transmit the extracted amplitude and phase data to the host computer. The present invention greatly reduces the data interaction between the quantum measurement and control system and the host computer, reduces the requirements for the performance of the host computer, and realizes the acceleration function of quantum bit measurement and control.

The invention provides a TEC controller chip test system and method, the system employs an integrated circuit automatic test machine ATE to test a TEC controller chip, the ATE comprises a voltage or current source, a high precision measurement unit, a power resistor and an arbitrary waveform generator, the voltage or current source is used as a power supply, the high precision measurement unit is used as a test instrument, and the power resistor is used as an arbitrary waveform generator. The power resistor is used for simulating the TEC, and the arbitrary waveform generator is used for simulating the voltage of the thermistor. According to the invention, the technical problems of high cost, low efficiency and low system reliability of the test of the TEC controller chip in the prior art can be solved.

The application provides a device and a method for realizing PON rate adjustment based on Polar modulation, and relates to the technical field of passive optical networks.The device comprises a first external cavity laser, a second external cavity laser, a dual-polarization phase quadrature modulator, an arbitrary waveform generator, an erbium-doped fiber amplifier, a single-mode optical fiber, a variable optical attenuator, a coherent receiver and an oscilloscope.The method comprises the following steps: dynamically adjusting the number of information bits A, splicing check bits to form total information bits, optimizing the distribution of information bits and frozen bits according to the optical signal channel sorting result, performing polar encoding on the signal at the encoding end, and mapping the signal into a 16QAM code symbol sequence by using the Polar modulation technology; at the receiving end, calculating the LLR, calculating the path metric value of all paths and performing a pruning operation when the list width reaches a set value, and detecting the L candidate paths by using the CRC check after the decoding is completed.The application realizes flexible regulation and control of the transmission rate of different optical network units.