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: The present disclosure relates to the technical field of optical fiber sensing, and particularly, to an optical time-domain reflectometer and method for eliminating interference fading. The reflectometer comprises a laser device, a frequency-division multiplexing modulator, circulator and signal processing device. The frequency-division multiplexing modulator comprises first and second modulators, first and second attenuators. The laser device is configured to generate a coherent light source, which source sequentially passes through the first modulator and the first attenuator to obtain a first optical pulse signal, sequentially passes through the first and second modulators to obtain a second optical pulse signal, and sequentially passes through the second attenuator and the second modulator to obtain a third optical pulse signal.

Abstract: The present application relates to the technical field of optical communications. Provided is a shock-resistant optical and electrical hybrid connector, comprising a male and female connectors, wherein the interiors of the male and female connectors are respectively provided with a first and second ceramic abutting heads which contain optical fibers, and a first metal contact head arranged on at least one side of the first ceramic abutting head, and a second metal contact head arranged on at least one side of the second ceramic abutting head. Further provided is an optical and electrical hybrid connector, comprising a male and female connectors, wherein the male connector is formed by a first housing sleeve, a first ferrule assembly, a central shaft assembly and a first boot that are sleeved on each other; and the female connector is formed by a second housing sleeve, a second ferrule assembly, a power transmission assembly and a second boot that are sleeved on each other.

Abstract: Disclosed is a side-push-type mounting and dismounting mechanism and a mounting method thereof. The dismounting mechanism comprises a housing seat (1), a pull ring (2), and elastic supports (3); the pull ring (2) comprises a pair of sliding plates (21), and the sliding plates (21) are each provided with a strop arm (211); the housing seat (1) comprises two side plates (11), and a first accommodating cavity (111) is formed on the side plates (11); the sliding plate (21) may slide reciprocally relative to the two side plates (11); and the elastic supports (3) are disposed in the first accommodating cavity (111); and the stop arm (211) abuts against one side of the elastic support (3), and moves reciprocally in the first accommodating cavity (111) in conjunction with a unlocking operation process and a resetting operation process of the pull ring (2).

Abstract: Disclosed are an optical module with an unlock warning function and a method of use thereof. A lever is provided on a base of the optical module, with an inclined groove formed. A handle for controlling the optical module to be inserted and unplugged matches the inclined groove to control a chamfer on the lever to rise or descend by controlling the movement of the handle relative to the base, and the chamfer is configured to match a slot of a metal shielding cage to fix and unlock the optical module, such that the optical module is controlled to be fixed and unlocked by controlling the handle. A contact point is arranged at a lower end of the chamfer, and when the chamfer descends, the contact point becomes electrically connected to a PCB in the optical module, whereby unlock warning is transmitted before the optical module is completely unplugged, preventing signal loss caused by its mistaken extraction.

Abstract: Disclosed in the present disclosure is a photoelectric composite connector integrated with multiple photoelectric channels.

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: An optical element (12) fixation structure, comprising: a module housing (10), a fixation body (111), a first fixation unit (112), a second fixation unit (113), a third fixation unit (114), and an elastic fixation unit (115), wherein the first fixation unit (112) is used for fixing a first end (131) of an optical fiber connector and a first end (121) of an optical element to a first end (1111) of the fixation body in a snap-fit manner, the second fixation unit (113) is used for fixing a second end (132) of the fiber optic connector and a second end (122) of the optical element to a second end (1112) of the fixation body in an attaching manner, and the third fixation unit (114) is used for fixing side edges of the optical element (12) to both sides of the fixation body (111).

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.