Abstract: The present invention relates to the field of optoelectronic communication and provides a module with a network interface. The module with a network interface comprises a base, a circuit assembly, and shielding elastic sheets. The base is provided with a screw seat thereon, and a first boss is provided on a side surface of the base. The circuit assembly comprises a circuit board, a network interface, and a grounding spring sheet. The circuit board is provided with a first notch which is coupled to a side wall of the screw seat; the grounding spring sheet is fixed on the circuit board and connected to the base. The shielding elastic sheet comprises two oppositely arranged side walls, each of which is provided with a folded edge, wherein the folded edge has a first buckling hole, which is buckled into the first boss to fix the shielding elastic sheet on the base.

Abstract: A BOSA device assembling apparatus and a mounting method thereof. The assembling apparatus comprises: a BOSA device (1) including a base and a middle seat (2) including a bottom plate (23), a first limiting arm (21) provided with a first snap-fit hole (211), and a second limiting arm (22) provided with a second snap-fit hole (221), the base comprising a first side surface (11) provided with a first boss (13) and a second side surface (12) provided with a second boss (14), which are oppositely set. The first limiting arm (21) and the second limiting arm (22) being both set on the bottom plate (23) and oppositely set, the bottom plate (23), the first limiting arm (21) and the second limiting arm (22) forming a mounting space. The bottom plate (23) is further provided with at least one protrusion (231) which is set on a side facing away from the first limiting arm (21) and is used to be fixed in a positioning hole (31) of a PCB board.

Abstract: Disclosed are a control method and an optical fiber amplifier. The optical fiber amplifier is configured to execute the control method. The method comprises: initially adjusting a target gain on the basis of a first offset gain to obtain the post-initial-adjustment target gain; when the actual power of the pump laser reaches target power determined on the basis of the post-initial-adjustment target gain, obtaining, on the basis of a first signal optical power and a second signal optical power, a second offset gain and a first offset slope through calculation; adjusting again the post-initial-adjustment target gain according to the second offset gain to obtain a adjusted target gain; and adjusting a target slope according to the first offset slope to obtain a adjusted target slope. This solution can provide high precision control for the gain and the slope of the optical fiber amplifier.

Abstract: A coherent receiving device and anemometry lidar system. The device includes: a polarization maintaining optical fiber pin for receiving local oscillation light and outputting it to frequency mixer; a polarization beam splitting prism for receiving signal light, splitting it into first and second signal light, and outputting them to the frequency mixer; the frequency mixer for mixing the first and second signal light with the local oscillation light and outputting the mixed light to PD array; the PD array for converting the mixed light to differential current signal; and a signal processing circuit for converting the differential current signal to differential voltage signal whose derivation formula includes part of frequency difference between the signal light and local oscillation light, detecting a frequency of the differential voltage signal to obtain a value of the frequency difference, and obtaining Doppler frequency shift amount of the signal light according to the value.

Abstract: An optical fiber adapter, relating to field of optical communication and comprising: a housing with a chamber having a first and second chamber connected with each other and respectively with two opposite ends of the housing; a retaining member integrally formed with the housing and provided within the first chamber, which is enclosed to form an receiving cavity having a first and second openings at one and other ends, respectively, and a third opening extending along a length direction of the retaining member; a retaining cover plate for detachably connecting to the retaining member to seal the third opening; and a ceramic sleeve provided within the receiving cavity and adjacent to the retaining cover plate, which has a third chamber connected with the first and second opening, and is limited within the receiving cavity. The retaining member is an integrated structure, improving the collimation performance of the adapter.

Abstract: An adapter assembly, relating to field of optical communication and comprising: a housing enclosed to form a chamber; a holding sleeve integrally formed with the housing, in which a receiving chamber is provided, wherein one end of the holding sleeve is provided in the chamber and the other end protrudes from the housing, and wherein the holding sleeve is provided with an opening communicated with the receiving chamber; a clamping member provided in the opening and detachably connected with the holding sleeve; a ceramic sleeve provided within the receiving chamber; and fixing members provided at two ends of the holding sleeve and fixedly connected with the holding sleeve to limit the ceramic sleeve. The axes of holding sleeves are the axes thereof, which avoids multiple holding sleeves from deviating each other due to assembly errors, and ensures that the ceramic sleeve may float freely within the holding sleeve.

Abstract: A lens clamping device, relating to the field of optical communication devices, comprises: a base; a sliding mechanism slidably connected with the base and movable relative to the base along a first direction; a transmission mechanism connected with the sliding mechanism and having a first and a second clamping member capable of relatively away from and close to each other along a second direction perpendicular to the first direction; and a suction nozzle fixedly connected to one end of the sliding mechanism along the first direction and used for sucking a lens; wherein the suction nozzle is between the first and second clamping member which are relatively close to each other to limit the displacement of the lens in the second direction. The lens clamping device improves the reliability of picking up the lens by means of limit in two directions.

Abstract: 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.

Abstract: Disclosed are a single-optical-fiber bidirectional transceiving device and an optical fiber communication system.

Abstract: Disclosed is a limit display device comprising a movable assembly, limit assembly and display assembly. The display assembly is fixed in the movable assembly. The movable assembly is slidably matched with the limit assembly and comprises a limit slot. The limit assembly comprises a limit rod, one end of which is embedded into the limit slot, and the other end of which is fixed to the limit assembly; when the movable assembly drives the display assembly to slide, the limit rod synchronously slides along a preset path of the limit slot, keeping a locked or unlocked state of the display device. The limit display device is set on a side close to an inwall of a case and uses a hidden drawing mode, whereby a display screen of the display device may be completely exposed or hidden, avoiding touching the display screen mistakenly, and reducing the occupation of the space of the case in depth direction.

Abstract: Provided are a method and system for controlling a Raman fiber amplifier. The method comprises: according to a target gain and a tilt, calculating an expected output power of a pump by using a feedforward formula, and obtaining an actual output power of the pump through detection (201); locking the actual output power of the pump to the expected output power through first-stage feedback control (202); according to the target gain and the tilt, calculating an expected ASE power of the pump by using an ASE formula, and obtaining an actual out-of-band ASE power of the pump through detection (203); if the out-of-band ASE is not locked, determining gain compensation and tilt compensation of the pump through second-stage feedback control, and feeding the compensation back to the feedforward formula and the ASE formula for recalculation (204); and repeatedly performing the first-stage feedback control and the second-stage feedback control until the gain and the tilt are locked (205).

Abstract: This disclosure relates to the field of optical communication technology and provides a high-isolation light source filling device in a wavelength division multiplexing system and method thereof. The light source filling device comprises a multiplexing WSS and demultiplexing WSS, wherein a filling light source is arranged on an output port carrying no service, of the demultiplexing WSS, and the filling light source guides filling light into the output port carrying no service; the filling light is transmitted through a second common port of the demultiplexing WSS or a light splitting device arranged on a first common port of the demultiplexing WSS, and the filling light transmitted through the demultiplexing WSS is guided into an input port carrying no service, of the multiplexing WSS. In this disclosure, it achieves the filling of high-isolation wide-spectrum noise light, and on the other hand, it does not add additional filtering devices.

Abstract: The embodiments of the present disclosure disclose a method and apparatus for detecting a phase difference and delay of a coherent receiver as well as a storage medium. The method comprises: acquiring a first set of signals and a second set of signals output by the coherent receiver; processing the first set of signals to obtain a first phase difference corresponding to the first set of signals; processing the second set of signals to obtain a second phase difference corresponding to the second set of signals; obtaining a phase difference and delay of the coherent receiver based on the first phase difference and the second phase difference. By using the above methods, the phase difference and delay detection accuracy of coherent receivers can be improved.

Abstract: An optical port assembly and optical module. The optical port assembly comprises a connector connected with an optical fiber, an adaptor having an accommodation cavity, and a shield extending into the accommodation cavity to be fixed. The shield has a hollow matching cavity, into which the adaptor extends to fixedly connect with the adaptor and the shield. The shield is wrapped on the adaptor to define the relative position between the shield and the adaptor, thereby defining the relative position between the shield and optical fiber then defining the position of an opening on the shield for allowing the optical fiber to pass through. The relative position between the opening and optical fiber is fixed, whereby the size of the opening may be set to be approximately the same as that of the cross-section of the optical fiber to minimize of the opening and reduce the electromagnetic leakage thereat.

Abstract: Disclosed is an active optical cable comprising an optical cable; optical modules, arranged at each of two ends of the optical cable and optically coupled with the optical cable, at least one of which is detachably connected with the optical cable; a first connecting terminal connected to one end of the optical cable and optically coupled with the optical cable; a second connecting terminal connected to the optical module and optically coupled with the optical module, the first connecting terminal and the second connecting terminal being optically coupled; and a connecting sleeve which is connected between the optical cable and the second connecting terminal and keeps the first connecting terminal and the second connecting terminal in an optical coupling state, wherein at least one of the optical cable and the second connecting terminal is detachably connected with the connecting sleeve.

Abstract: Disclosed are a method, device and system for dynamically controlling a gain of a Raman optical fiber amplifier. The method comprises: determining whether a target gain falls within a gain mask range; if the target gain falls within the gain mask range, directly locking a gain to the target gain; and if the target gain falls outside the gain mask range, locking the gain to a corresponding maximum gain in the gain mask range, and gradually increasing the locked gain according to a preset first step length until the target gain is reached or until at least one pump laser reaches a maximum output power. The invention enables an optical fiber amplifier to respond quickly to a change in an input optical signal, ensures gain stability, and ensures that no power overshoot or undershoot occurs in the non-switched optical channels in an optical path. Moreover, the invention minimizes an amount of time required to complete switching between gains.

Abstract: 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.

Abstract: Disclosed are an optical waveguide device and manufacturing method thereof. The optical waveguide device includes a substrate and an optical modulation module electrically connected with the substrate, the optical modulation module including: an underlay having a first surface relatively close to the substrate and a second surface relatively far away from the substrate, which are provided opposite to each other; an optical waveguide lamination, located between the first surface of the underlay and the substrate, including a lower cladding layer, an optical waveguide layer and an upper cladding layer located between the first surface of the underlay and the optical waveguide layer, which are three stacked in a first direction perpendicular to a plane where the underlay is located; and a conductive structure, located between the optical waveguide layer and the substrate and electrically connected with the optical waveguide layer to conduct an electric signal to the optical waveguide layer.

Abstract: Disclosed are an online program update method and device for an optical amplifier. The method comprises: when a program update instruction is sent, a Microcontroller Unit MCU receiving update programs of MCU and a programmable logic device FPGA, storing them in a program memory device, and sending an update instruction to FPGA; FPGA terminating; operations of a digital-to-analog converter DAC according to the instruction and a current state remaining unchanged; MCU loading new codes of MCU and FPGA while DAC remains in state of halting refreshing; and after MCU and FPGA run the new codes, reading previously stored data, and starting switching from a previous operation state to enter normal operation state. On basis of conventional optical amplifier control, the invention combines characteristics of MCU and FPGA, and ensures uninterrupted service of optical amplifiers, achieving smooth transition of services, thereby improving stability and reliability of whole optical communications systems.

Abstract: Disclosed are an active optical cable assembly and assembling method thereof. The assembly comprises an optical fiber connector, optical port adapter, and optical transceiver sequentially connected, the latter two being pluggably connected; wherein the optical fiber connector comprises a movable kit, and a tail sleeve, an intermediate connection sleeve, and a plug connector sequentially connected; the movable kit is sleeved on the outer side of the plug connector for preventing the plug connector from detaching from the optical port adapter after inserted into the optical port adapter; a blocking member is disposed between the tail sleeve and the movable kit, and prevents the movable kit from sliding backwards. When the blocking member is removed and the movable kit is slid backwards to the intermediate connection sleeve, the plug connector is pullable out from the optical port adapter, whereby the optical transceiver is not connected to the optical cable during assembly.