Accelink Technologies Co., Ltd.

Wuhan Telecommunication Devices Company

Accelink Electronic Technology Co., Ltd

Qinlian Bu

Chengpeng Fu

Chunping Yu

Jintao Tao

Tao Xiong

Lijie Qiao

Cuihong Zhang

Menghui Le

Zhenyu Yu

Weiqing Zhang

Yunyu Jing

Li Hong Xiao

Chenggang Liu

Zhi Chen

Fei Liu

Fuxing Deng

Rui Lei

Xiao Cai

Peng Zhang

Alan Glen Solheim

Jian Li

Hongchun Xu

Hui Zou

Qi Zhou

Wuping Zhang

Yangyang Yue

Xiaoping Song

Jiantao Zhang

Yuxiang Yang

Zhijun Ye

Shunli Zhou

Nina Lv

Di Fang

Li Xiao

Chunpin Yu

Xijie Wu

Guangying Xiao

Fei Cai

Xiaohui Zou

An optical signal adjusting apparatus, device and method, and storage medium. The optical signal adjusting apparatus () includes a differential operation circuit (), a feedforward amplification circuit () and a control circuit (), wherein input ends of control circuit () are respectively connected to an output end of the differential operation circuit () and an output end of the feedforward amplification circuit (); the differential operation circuit () is configured to perform a differential operation on an input optical signal and an output optical signal, to obtain a differential value; the feedforward amplification circuit () is configured to perform feedforward amplification on the input optical signal, to obtain a feedforward value; and the control circuit () is configured to receive the differential value and the feedforward value, and adjusts the output optical signal according to the differential value and the feedforward value, to obtain an adjusted output optical signal.

Device, apparatus, and method for adjusting optical signals, and storage medium

Disclosed are an optical signal outputting device and method, and a storage medium. The device includes a pump laser, first fiber grating and target fiber grating connected seriatim, the pump laser being configured to emit a first optical signal to the first fiber grating upon receiving a target waveband optical signal transmission instruction, and convert a second waveband optical signal into a target waveband optical signal by resonance upon receiving an optical signal adjusting instruction, then output the same; the first fiber grating being configured to filter the first optical signal to obtain a first waveband optical signal and send it to the target fiber grating; and the target fiber grating being configured to filter the first waveband optical signal to obtain a second waveband optical signal and the target waveband optical signal to use one of them to deliver the optical signal adjusting instruction to the pump laser.

Optical signal outputting device, method, and storage medium

The present invention relates to the technical field of optical communications, and relates to an optical amplification method and an amplifier, and in particular, to a self-adaptive wave band amplification method and an amplifier. The present invention consists of a master amplifying unit and a slave amplifying unit, and can autonomously detect the service signal wave band range of an optical transmission line, and according to the detection result, the two amplifying units do not need to perform scheduling or configuration from the level of network management, and perform direct interaction and action from the bottom layer to implement self-adaptive on, off and adjustment in real time. On one hand, power consumption is reduced, and energy is saved; and on the other hand, the performance is optimized, and an optimal optical amplification index is obtained.

Self-adaptive wave band amplification method and amplifier

Disclosed are a long-distance optical fiber detecting method, apparatus, device and system, and a storage medium. The method comprises: in response to a detection request of a target node on a to-be-detected optical fiber, determining a first and second sampling sequence that are formed by respectively propagating, on said optical fiber, a first and second optical signal respectively sent from each end of the optical fiber through an OTDR; determining a total length of the optical fiber; generating a detection result according to the first and second sampling sequence and the total length, and sending the detection result to the target node. By determining the first and second sampling sequence and combining the total length of the optical fiber, a detection result of the to-be-detected optical fiber is generated.

Long-distance optical fiber detecting method, apparatus, device and system, and storage medium

The present invention relates to the technical field of optical communications, and particularly relates to a wavelength locking optical module, a device, and a wavelength locking method. The optical module comprises a DSP unit, a TOSA, and a ROSA. The DSP unit has a signal output terminal connected to the TOSA and a signal input terminal connected to the ROSA. A TEC is provided within the TOSA, and is used to adjust a temperature according to a control signal sent from the DSP unit and accordingly adjust a emission wavelength of the TOSA. An optical filter is provided within the ROSA and used to filter a wave, such that light having a pre-determined wavelength passes through the filter and is converted into an electrical signal and output to the DSP unit. The DSP unit calculates an optical power according to the received electrical signal, and determines wavelength control of the TOSA according to an optical power change. The present invention has the optical filter provided within the ROSA, combines an original optical detection capability of the ROSA and a signal processing capability of the DSP unit to monitor a wavelength change, and adjusts a wavelength by means of the TEC, thereby reducing TOSA volume, simplifying processes and reducing costs.

Wavelength locking optical module, device, and wavelength locking method

Disclosed are a dual-carrier integrated optical device and a photoelectric module. The optical device comprises: an encapsulation unit, and a ceramic substrate and two independent carrier assemblies arranged in the encapsulation unit. Every carrier assembly comprises a DWDM active chip arranged on the first heat sink, a first heat sink arranged on the independent control element, and an independent control element for adjusting the temperature of the DWDM active chip to adjust an output wavelength of the DWDM active chip. The DWDM active chip and the independent control element are respectively connected to the ceramic substrate. According to the characteristic that the wavelength of the active chip will shift with the temperature, an output laser wavelength of each active chip is independently controlled by means of the independent control element, which achieves higher wavelength stability and can realize optical signal transmission at different rates.

Dual-carrier integrated optical device and photoelectric module

An optical amplifier assembly and a detection method capable of dynamically performing optical time-domain reflection detection. The detection method comprises obtaining signal light intensity detection signals from a first and second photodetectors and sending a control signal to an L-band Raman pump when the signal light intensity in the second photodetector is lower than a first preset threshold, so that the L-band Raman pump enters into an optical time-domain reflection detection mode; sending a control signal to the L-band Raman pump when the signal light intensity in the second photodetector is greater than or equal the first preset threshold, so that the L-band Raman pump enters into an L-Band Raman optical fiber amplifier operation mode.

Optical amplifier assembly and detection method for dynamically executable optical time-domain reflection detection

An optical circuit includes: a multicast-and-select (MCS) switch and multiple optical selective devices coupled to output ports of the MCS switch. The selective devices may select a single optical channel by blocking some of wavelengths of light passing therethrough and passing at least one other wavelength. The selective devices may be wave blockers or tunable optical filters. The optical circuit further includes an optical amplifying array, wherein each amplifier has an input port optically coupled to one of the selective devices. At least some of the amplifiers have pump light ports for receiving at least a portion of the pump light from one or more laser pumps or from another of the optical amplifiers, wherein the pumps are capable of providing pump light sufficient to fully saturate all of the rare earth doped optical fibers in the array.

Add drop structure

Provided by the embodiments of the present invention are a remote optical fiber dispersion compensation device and method, the dispersion compensation device comprising: a distance measurement module, used for measuring a remote distance to a remote access optical fiber; a channel monitoring module, used for monitoring the spectral power of a transmission service wavelength channel; and a remote optical fiber dispersion power equalization module, used for compensating the dispersion of a transmission service signal and adjusting the insertion loss of the wavelength channel according to the measured remote distance of the remote access optical fiber and the monitored spectral power of the transmission service wavelength channel. By employing the embodiments of the present invention, compensation amounts of different channels may be flexibly selected by means of a wavelength selection switch, dispersion may be compensated for remote optical fiber transmission and the insertion loss may be adjusted for different channels by presetting dispersion compensation optical fibers of different lengths, thus achieving compensation and equalization of dispersion and power difference introduced by remote optical fibers of different lengths.

Remote optical fiber dispersion compensation device and method, remote access device, electronic device and non-transient computer-readable storage medium

The present disclosure relates to a technical field of optical communication, and provides a method and an apparatus for determining maximum gain of Raman fiber amplifier. Wherein the method includes obtaining transmission performance parameters of a current optical fiber transmission line; respectively obtaining impact factors A, A, Aaccording to a distance between a joint and a pump source, a fiber loss coefficient, and a fiber length included in the transmission performance parameters; calculating a joint loss value Attaccording to a distance between a joint and a pump source, a fiber loss coefficient, and looking up impact factor Aaccording to Att; determining an actual maximum gain which may actually be achieved by the Raman fiber amplifier according to A, A, A, A. The actual maximum gain obtained in the present disclosure is the maximum gain that may be achieved over all input power ranges, and the original signal in system is kept to operate at a fixed gain, such that a gain locking effect is realized, and fluctuation of existing transmission signal power caused by signal change in transmission fiber link is avoided.

Method and apparatus for determining maximum gain of Raman fiber amplifier

A method for realizing precise gain control for a hybrid fibre amplifier, and a hybrid fibre amplifier, in which by an erbium-doped fibre amplifier firstly outputting a constant power, a comparable source signal optical power is provided for a raman fibre amplifier of a next stage. A feedback for the gain control may be formed by comparing a source signal optical power calculated after starting pumping of the Raman fibre amplifier and a source signal optical power detected after pumping stops, thereby greatly improving gain control precision of the Raman fibre amplifier. Moreover, the erbium-doped fibre amplifier parts of all the hybrid fibre amplifiers may simultaneously output a constant optical power, and the Raman amplifier parts of all the hybrid fibre amplifiers may simultaneously start calibration, so that the time for starting operation of the entire system may be improved greatly.

Method for realizing precise target gain control for hybrid fibre amplifier, and hybrid fibre amplifier

A tunable optical dispersion compensator (TODC) for providing chromatic dispersion (CD) compensation of optical signals in a plurality of optical channels comprises: a plurality of CD compensation fibers; a tunable optical switch configurable for directing an optical signal in any of the plurality of optical channels to one of the plurality of fibers, dependent on a central wavelength of the optical signal; a first switch configurable for directing all signals in the plurality of optical channels to a first CD compensation fiber, in a first mode of operation, and for bypassing the first CD compensation fiber in a second mode of operation; and, the first CD compensation fiber, wherein the first switch and the tunable optical switch are connected so as to enable combining CD compensation provided by the first CD compensation fiber and CD compensation provided by any one of the plurality of CD compensation fibers.

Method and device for chromatic dispersion compensation

This invention involves and discloses a heat control device for power equipment, which comprises heat source, heat sink base plate, heat insulation layer, dissipation heat sink and thermal control switch, wherein the heat source is placed on and in contact with dissipation heat sink, and its bottom is in direct lap joint with heat sink base plate, wherein the heat insulation layer is set around heat sink base plate, wherein the thermal control switch is placed on heat sink base plate. This invention of heat control device is one that demonstrates excellent low temperature thermal insulation property for key components or heat-sensitive elements of power equipment. The heat control device applying technical solutions described in this invention features easy manufacturing, low cost and reliable performance.

Heat control device for power equipment

A Raman pump laser control apparatus comprises a wavelength division multiplexer, a tap coupler, a photoelectric detector, an analog amplification processing circuit, an analog-to-digital converter, a fast Raman pump control unit, an digital-analog converter, and a Raman pump laser. The fast Raman pump control unit, after having known anticipated output light power of the Raman pump laser, based on a direct relationship between a current anticipated output light power of the Raman pump laser and input digital quantity that is needed by the digital-analog converter, uses a feedforward control mechanism so that actual output light power of the Raman pump laser fastly approximates the anticipated output light power thereof, and then synchronously combines with a feedback control mechanism so that the actual output light power of the Raman pump laser is precisely locked on the anticipated output light power, thereby achieving fast and precise control of the Raman pump laser.

Raman pump laser control apparatus and control method therefor

A hybrid fiber amplifier and method of adjusting gain and gain slope of thereof. The hybrid fiber amplifier comprises: RFA and EDFA that does not comprise variable optical attenuator. The RFA comprises pump signal combiner, pump laser group, out-of-band narrow-band filter, and photodetector. The EDFA comprises input coupler, erbium-doped fiber, output coupler, input photodetector, and output photodetector that are connected in sequence. The hybrid fiber amplifier also comprises control module that coordinates and controls EDFA and/or RFA to adjust gain and/or the gain slope based on desired amplification requirements. The EDFA and/or RFA can be coordinated and controlled by using the control module to achieve desired amplification effect. In addition, the EDFA does not comprise the variable optical attenuator, which avoids problems caused by the variable optical attenuator. The hybrid fiber amplifier and method of adjusting gain and gain slope thereof are applicable to technical field of optical communications.

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Wuhan, China

Qinlian Bu