Taiyuan University of Technology

Yuncai Wang

Anbang Wang

Tong Zhao

Mingjiang Zhang

Lijun Qiao

Jianguo Zhang

Jianzhong Zhang

Pu Li

Bingjie Wang

Dong Wang

Jian Li

Zhiwei Jia

Baoquan Jin

Yu Wang

Yi Liu

Peixin He

Tao Wang

Tianshuang Lv

Baoqiang Yan

Hucheng He

Qiang Cai

Qiqi Zhang

Xin Wang

Yixuan Wang

Guodong Zhang

Yuanyuan Guo

Xianglian Liu

Longsheng Wang

Rui Hou

Hang Xu

Ya'nan Niu

Li Liu

Yang Xu

A self-calibration detection device and a temperature demodulation method oriented to a fiber Raman temperature sensing system. The self-calibration detection device comprises a fiber Raman thermodetector, thermostatic baths, a multi-mode sensing fiber, and a multi-mode reflector. The fiber Raman thermodetector comprises a pulsed laser whose output end is connected to the input end of a WDM. Two output ends of the WDM are respectively connected to input ends of a first and second APDs. Output ends of the first and second APDs are respectively connected to input ends of a first and second LNAs. Output ends of the first and second LNAs are connected to the input end of a data acquisition card whose output end is connected with the input end of a computer. The temperature demodulation method can solve the problems of low temperature measuring accuracy, lower temperature measurement stability and low temperature measurement efficiency.

Self-calibration detection device and temperature demodulation method oriented to fiber Raman temperature sensing system

The present disclosure relates to a radar ranging system based on a true random generator and a ranging method thereof The present disclosure adopts the following technical scheme: the system comprises a radar signal modulation and transmission unit and a radar signal receiving and processing unit, wherein the radar signal modulation and transmission unit inputs and stores a true random binary sequence generated by the true random generator in a memory, and cyclically outputs the true random binary sequence to a BPSK modulator for phase modulation. The receiving and amplifying unit receives the reflected radar signal. The down-sampling unit down samples the intermediate frequency signal generated by the mixers. The data processing unit converts the sampled analog signal into a digital signal and cross-correlates the signal with the true random binary sequence in the memory, so as to obtain the distance to the object side to be measured.

Radar ranging system based on true random generator and ranging method thereof

A temperature demodulation method oriented toward a distributed fiber Raman temperature sensing system, the method comprising the following steps: step 1 of constructing a high-precision temperature detection device oriented towards a distributed fiber Raman sensing system; step 2 of performing signal processing with respect to Stokes light and anti-Stokes light at a calibration stage; step 3 of performing signal processing with respect to Stokes light and the anti-Stokes light at a measurement stage; and step 4 of obtaining a high-precision temperature demodulation technique oriented toward the distributed fiber Raman sensor. The method is used to effectively resolve the issue of low temperature measuring accuracy caused by Rayleigh crosstalk in existing distributed fiber Raman temperature measurement systems, and temperature measurement accuracy thereof is expected to fall within &#xb1;0.1&#xb0; C. The method is applicable to distributed fiber Raman temperature measurement systems.

High-precision temperature demodulation method oriented toward distributed fiber Raman sensor

A physically unclonable function (PUF) device includes a hybrid Boolean network module of a ring of N number of Boolean nodes connected end to end and a sampling module, wherein the hybrid Boolean network module comprises N number of xor logic gates and corresponding N number of multiplexers, wherein a function change module is disposed between an output end of a first xor logic gate of the N number of xor logic gates and an input end of a first multiplexer of the N number of multiplexers, wherein each Boolean node is provided with four input ends and three output ends, the four input ends respectively connected to an output end of each of two juxtaposing Boolean nodes, an initial excitation signal and a control delay signal, the three output ends respectively output to an input of each of two juxtaposing Boolean nodes, and the sampling module.

Multifunctional physically unclonable function device based on hybrid Boolean network

Disclosed by the present invention is an ultra-wideband white noise source based on a slicing super-continuum spectrum. The entropy source used is a super-continuum spectrum photon entropy source having a coverage range of several hundreds of nm, white noise can thus be generated in a wide frequency range, thereby effectively avoiding the bandwidth bottleneck of an electronic device. By separately adjusting the filter centers of two optical filters, the center frequency for generating the white noise can be adjusted so as to get adapted to different working situations. High bandwidth white noise can be generated by simply filtering the super-continuum spectrum and performing photoelectric conversion, and in comparison with the previous solutions, the solution of the present invention is simpler and can be easily implemented.

Ultra-wideband white noise source

The present disclosure provides a high-speed random number generation method and device, comprising an entropy source module and an entropy sampling module. The entropy source module is an autonomous Boolean network formed by digital logic gates, the network is formed by an XNOR gate and (N&#x2212;1) XOR gates, wherein the value of N is equal to 3n (n is a positive integer), and the entropy source can generate chaotic signals having wide and flat frequency spectrum. The entropy sampling module of the present disclosure is formed by D flip flops used for sampling and quantizing the chaotic signals to generate random number sequences. The random number sequences generated by the present disclosure can pass test standards (NIST and Diehard statistic tests) of random number industry and have excellent random statistic characteristics. The random number generation method and device of the present disclosure are completely formed by the digital logic gates, the circuit structure is simple and is easy to be integrated, and without the need of a post processing algorithm or circuit required by a conventional random number generation device, the power consumption can be greatly reduced. The present disclosure can be widely applied to the fields of information security such as secure communications, key distribution, data encryption and the like.

High-speed random number generation method and device

An InP-based monolithic integrated chaotic semiconductor laser chip capable of feeding back randomly diffused light, being composed of six regions: a left DFB semiconductor laser, a bidirectional SOA, a left passive optical waveguide region, a doped passive optical waveguide region, a right passive optical waveguide region, and a right DFB semiconductor laser, specifically including: an N+ electrode layer, an N-type substrate, an InGaAsP lower confinement layer, an undoped InGaAsP multiple quantum well active region layer, doped particles, distributed feedback Bragg gratings, an InGaAsP upper confinement layer, a P-type heavily doped InP cover layer, a P-type heavily doped InGaAs contact layer, a P+ electrode layer, a light-emitting region, and isolation grooves. It effectively solves problems of bulky volume of the existing chaotic laser source, the time-delay signature of chaotic laser, narrow bandwidth, and low coupling efficiency of the light and the optical waveguide.

INP-based monolithic integrated chaotic semiconductor laser chip capable of feeding back randomly diffused light

The present invention discloses an integrated broadband chaotic semiconductor laser using optical microcavities. The arc-shaped hexagonal laser outputs light. Part of the light is totally reflected through the deformed microcavity and then reflected out of the deformed microcavity from the passive waveguide II; after entering the passive feedback waveguide, another part of the light is fed back into the deformed microcavity by the high reflection film, passes through an in-cavity ray track and then is also reflected out of the deformed microcavity from the passive waveguide II; the two-path light is coupled into the arc-shaped hexagonal laser, and finally generated chaotic laser light is directionally coupled and output through the passive waveguide I at the other end of the arc-shaped hexagonal laser. The present invention has wide broadband, flat spectrum, compact structure, and no time delay signature.

Integrated broadband chaotic semiconductor laser using optical microcavities

The present invention discloses a high-precision and large-dynamic-range fault monitoring device and method for a WDM-PON. The monitoring device includes a WDM-PON optical network system and an optical network monitoring system. The optical network system includes an OLT I, a feeder fiber II, a 1&#xd7;n AWG III, a branch fiber IV, and an optical network unit V The optical network monitoring system includes an FP laser, a coupler, an optical coupling device, a photodetector, a signal acquisition and processing device, and an optical feedback device, where the FP laser is connected to the coupler; a large-coupling-ratio output end of the coupler is connected to an input end of the optical coupling device, and a small-coupling-ratio output end of the coupler is connected to an input end of the photodetector; the optical coupling device is installed on the feeder fiber II.

High-precision and large-dynamic-range fault monitoring device and method for WDM-PON

The present invention discloses a device and a method for monitoring two-stage faults of a TDM-PON with high precision. A two-stage TDM-PON system includes an OLT I, a feeder fiber II, a stage-1 1:n optical splitter III, a stage-1 branch fiber IV, a stage-2 1:n optical splitter V, a stage-2 branch fiber VI, and an optical network unit (ONU) VII. A two-stage optical network monitoring system includes a monitoring part on the OLT I side and a monitoring part on the ONU VII side, where the monitoring part on the OLT I side includes a control-end isolator-free semiconductor laser, a control-end coupler, a control-end optical coupling device, a control-end photodetector, an integrated signal acquisition and processing device, and an optical coupling device; and the monitoring part on the ONU VII side is similar to the monitoring part of the OLT I side.

Device and method for monitoring two-stage faults of TDM-PON with high precision

A monolithic integrated semiconductor random laser comprising substrate, lower confinement layer on the substrate, active layer on the lower confinement layer, upper confinement layer on the active layer, strip-shaped waveguide layer longitudinally made in middle of the upper confinement layer, Pelectrode layer divided into two segments and made on the waveguide layer and Nelectrode layer on a back face of the lower confinement layer, wherein the two segments correspond respectively to gain region and random feedback region. The random feedback region uses a doped waveguide to randomly feedback light emitted by the gain region and then generates random laser which is random in frequency and intensity. Further, the semiconductor laser is light, small, stable in performance and strong in integration.

Monolithic integrated semiconductor random laser

In a method and a corresponding apparatus for performing chaotic optical time domain reflectometer, the chaotic laser signal, generated by the chaotic laser transmitter, is split into probe signal I and reference signal II by a fiber coupler. Through an optical circulator, the probe signal I is launched into the test fiber and the echo light is converted into electrical signal by a photodetector and digitalized by an A/D converter. The reference signal II is converted into electrical signal by a photodetector and digitalized by another A/D converter. Two digital signals received from two A/D converters are correlated in a signal processing device to locate the exact position of faults in fibers. The result output is then displayed on a display device. This invention was developed to overcome the tradeoff problem between resolution and dynamic range of the pulse-based OTDR.

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Taiyuan, China

Yuncai Wang