Accelink Technologies Co., Ltd.

The Wuhan Digital Pet Co., Ltd

Wuhan Ll Science and Technology Development Co., Ltd.

Wu Han Aibird Uav Co., Ltd.

Bo Zhang

Liping Sun

Qianggao Hu

Liu Yang

Yuan Zhang

Yi Hu

Lei Fang

Leilei Hu

Chaodong Wang

Yongkai Chen

Jing Wang

Weidong Ma

Kun Qian

Jie Zhou

Zhilin Yuan

Rui Yang

Zhiqiang Chen

Hongchun Xu

Hui Zou

Hui Xie

Wen Zhou

Fei Liang

Sijun Lei

Xiaohua Ding

Qionghui Song

Xiaobo Wang

Wuping Zhang

Sheng Chen

Xueyong Zhang

Xueming Liu

Sen Hu

Panpan Duan

Dongcheng Dai

Zhao Huang

Jun Luo

A drive circuit for a direct modulated laser and a direct modulated optical transmitter. The drive circuit includes a service data drive unit, a voltage configuration unit, a monitoring data modulation unit, and a monitoring current generation unit. Output terminals of the voltage configuration unit and the monitoring data modulation unit are connected to a same input terminal of the monitoring current generation unit. An output terminal of the service data drive unit is connected to a current sink interface of the monitoring current generation unit, and is suitable for connecting a direct modulated laser. In the technical solution, a low-speed monitoring data signal is mixed into an average optical power signal of a high-speed service data light wave from the direct modulated laser, then is extracted from the received optical signal by a remote optical receiver, enabling the drive circuit to be remotely monitored.

Drive circuit for direct modulated laser, and direct modulated optical transmitter

Disclosed are a single-optical-fiber bidirectional transceiving device and an optical fiber communication system. The device comprises a composite optical transmission port being coupled with an optical fiber; an optical input port for outputting an inputted emitting signal to the composite optical transmission port; an optical output port for outputting a receiving signal input from the composite optical transmission port; an bidirectional optical transmission assembly for transmitting the receiving signal input from the composite optical transmission port to an optical guide assembly and an emitting signal output from the optical guide assembly to the composite optical transmission port; and the optical guide assembly for transmitting the emitting signal input from the optical input port to the bidirectional optical transmission assembly and a receiving signal output from the bidirectional optical transmission assembly to the optical output port, whereby a bidirectional optical transceiving function can be realized through a single optical fiber.

Single-optical-fiber bidirectional transceiving device and optical fiber communication system

Disclosed are a calibration method and apparatus for a coherent light module, and a computer-readable storage medium. The method comprises: obtaining a first and second curve relationship respectively representing a relationship between a power-gain monitoring voltage and optical power of a receiver of the coherent optical module and a relationship between a target setting voltage and the optical power of the receiver in the optical power range of the receiver; determining first optical power based on the first and second curve relationship, which is used for dividing the optical power range of the receiver into two ranges; and determining a calibration mode of the coherent light module based on the first optical power, which comprises: calibrating the coherent light module by using the first curve relationship or the second curve relationship when the optical power of the receiver is in a first range or in a second range.

Calibration method, apparatus and device for coherent optical module, and computer readable storage medium

The present disclosure belongs to the field of chemical synthesis, and in particular relates to an ammonium carboxylate compound, a crystalline form and an amorphous form, and a preparation method thereof. The present disclosure prepares the compound and the crystalline form I and its single crystal, amorphous form and crystalline form II thereof. The compound, the crystalline forms, the single crystal and the amorphous form can stably exist and exhibit good solid forms, suitable for medicine-making. Furthermore, these products possess high purity and less single impurity. Moreover, the preparation methods of the present disclosure are easy to implement due to the simple processes with mild reaction conditions, and could produce products of high yield and high purity without complex purification steps. Furthermore, the preparation methods may facilitate safety, environmental protection, and industrial production.

Ammonium carboxylate compound, crystalline form, amorphous form and preparation method thereof

An intelligent control system for a detector comprises an external control module () and at least one group of data transmission and control modules (), wherein the external control module () is used for controlling packet issuing and feedback message processing; a fifth interface () connected to the external control module () and used for packet transmission; a processing unit (); at least one group of first type of interfaces () respectively connected to a detector () and used for transmitting a control packet of the detector (); at least one group of second type of interfaces () respectively connected to the detector () and used for transmitting original data of the detector (); a data pre-processing unit () for acquiring and forwarding the original data or pre-processing data of the detector (); and a sixth interface () connected to the external control module () and used for transmitting the original data/pre-processing data of the detector (). The intelligent control system for a detector can form an intellectualized control platform for performing dynamic configuration, intelligent monitoring, power supply management, data processing, foreign interaction, firmware updating on the detector ().

Intelligent control system and control method for detector, and pet device

A debugging method and device for an operating point voltage of a parallel MZI electro-optical modulator. The parallel MZI electro-optical modulator comprises a Parent MZI () formed by a parallel connection of a Child MZI () in an I path and a Child MZI () in a Q path. The debugging method comprises: fixing a bias voltage of one Child MZI of the Child MZI () in the I path and the Child MZI () in the Q path; gradually adjusting a bias voltage of the other Child MZI, testing a parent extinction ratio PER of the Parent MZI () when different bias voltages are applied, and finding a corresponding bias voltage as an operating point voltage of the other Child MZI when the PER of the Parent MZI () reaches a minimum value, and then finding a corresponding bias voltage as an operating point voltage of the one Child MZI when the PER of the Parent MZI () reaches a minimum value; setting the bias voltages of two Child MZIs as operating point voltages corresponding to the two Child MZIs respectively, adjusting a phase modulation voltage of the Parent MZI () until the parallel MZI electro-optical modulator reaches an optimum output effect, and determining the phase modulation voltage of the Parent MZI (). The method and device are simple; and the debugging process thereof is fast and efficient.

Debugging method and device for operating point voltage of parallel MZI electro-opticalmodulator

A method and a structure for determining a global clock among systems are disclosed. When a standardized time reference is required among systems, a reference clock source may transmit a calibration signal, and a transmitting time T(0) may be recorded. Each system may respectively record an arrival time T(n), transmit a return signal to a signal recording unit of the reference clock source, and record a transmitting time T(n), after receiving the calibration signal. Similarly, because of different distances, the signal recording unit may record arrival times T(n) of the return signals subsequently, and determine time delays Delay (n) between systems and the reference clock source respectively. When all the systems are required to have a completely standardized time reference, a corresponding Delay (n) may be acquired and transmitted to each system. Each system may determine zero deviations T(n) of various local clocks from the reference clock source, and take T(n) as a correction parameter to correct its own system clock, so that the local clocks of all the systems have a completely standardized time reference.

Method and structure for determining global clock among systems

A method and a device for providing a global clock in a system, the terminals in the system are channel connected to each other via paths, each terminal is communicatively connected to a clock source ultimately via a signal recording unit, respectively, the clock source sends a calibration signal to the network, the signal recording unit records the current transmitting time T () of the calibration signal, each terminal will receive the calibration signal sequentially due to different distances from the clock source and will return the signal, the backward signals are returned to the signal recording unit along the network sequentially, and the signal recording unit records the time T (n) of each backward signal sequentially, in this way, the signal recording unit can then measure the delay between each terminal and the clock source signal, which can be used as a correction parameter to ensure that all terminals are in exactly the same time reference, in addition, in this way, there is no need to control the length of the clock cables from each terminal to the clock source, and no special consideration is required for clock routing, and difficulties in system assembly, calibration, maintenance and expansion brought by large amounts of cable are avoided.

Method and device for providing a global clock in a system

Monopod holder for mobile phones and cameras

A multicast exchange optical switch includes an input port device including M input ports, an output port device including N output ports, a diffractive beam splitter, an optical focusing component, and a 1&#xd7;N array of reflective devices. The diffractive beam splitter diffracts each input signal beam from the input ports into at least N directions. The optical focusing component includes a first focusing lens and a second focusing lens. The first focusing lens focuses sub-beams from the respective input ports along the Y-axis direction having the same diffraction order. The second focusing lens focuses on the X-axis direction sub-beams from the same input port having different diffraction orders. The 1&#xd7;N array of reflective devices is provided at the focal plane of the optical focusing component and each reflective device reflects a sub-beam from any one of the input ports to any one of the output ports.

Multicast exchange optical switch

A multicast optical switch based on free-space transmission comprises a 1&#xd7;M input collimator array, a light splitting device, an optical distance compensation device, a spot transformation device, a 1&#xd7;N output collimator array and a reflector array which are arranged in sequence. The 1&#xd7;N output collimator array corresponds to reflector array. The light splitting device is provided with a light splitting surface and a reflection surface, and by means of light splitting surface and reflection surface, light splitting and beam splitting of n times are carried out on input signals of 1&#xd7;M input collimator array, and then N beams of sub-signal light are generated. The optical distance compensation device compensates optical distance differences among M&#xd7;N sub-signal light beams produced by light splitting device. The M&#xd7;N sub-signal light beams are focused to be 1&#xd7;N light spots through light spot conversion device, and then 1&#xd7;N light spots are reflected to reflector array.

Multicast optical switch based on free-space transmission

Growing community of inventors

Wuhan, China

Bo Zhang