ACCELINK TECHNOLOGIES CO., LTD.

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.

A heating electrode for lowering stress of a light waveguide and a VOA. The heating electrode is provided on an upper cladding layer ( 04 ) of a PLC waveguide. The heating electrode is formed by combining two or more sub-heating electrodes ( 13 ) arranged at internals. Adjacent sub-heating electrodes ( 13 ) are connected by means of conductive electrodes ( 14 ) having a conductive function. By dividing a complete elongated heating electrode into a plurality of sub-heating electrodes ( 13 ), the stress exerted to a waveguide core layer is lowered without affecting the heating efficiency, and thus the reliability of optical indexes of a device is effectively improved.

A narrow linewidth external cavity semiconductor laser comprises semiconductor optical amplifier chip, comb-shaped optical filter, bandpass optical filter, partial reflection sheet, and collimated light beam coupling output assembly Collimated light beam coupling output assembly is composed of isolator, coupling lens, and output optical fiber. Laser resonant cavity is formed by partial reflection sheet and rear end face of semiconductor optical amplifier chip. Comb-shaped optical filter and bandpass optical filter form single-channel narrowband optical filtering assembly. Bandwidth enables laser to perform single-mode lasing and effectively restrain any other mode lasing. Longitudinal mode's relative position over whole filtering band may be controlled by adjusting laser temperature. Output wavelength and laser power are controlled and in best working state. Etalon is used as comb-shaped optical filter to easily realize narrow linewidth output. Commercial DWDM optical filter is used as bandpass optical filter to improve device wavelength flexibility and reduce costs.

An optical power and gain detection apparatus including multiple optical power detection circuits, an FPGA device, and a temperature detection circuit. Various optical power detection circuits include a respective independent photoelectric converter, a trans-impedance amplifier, an analog signal conditioning circuit, a filter and an analog-digital conversion chip. By improving an analog circuit, digital detection and control in an optical amplifier, the property of the FPGA device may be used to realize the detection of optical signal and gain in a burst mode, avoid increasing complicated analogue circuits, and avoid the influence caused by element inconsistency in an analogue control solution. Whether the optical signal is in a stable mode or in a burst mode, the algorithm can detect the optical power accurately and stably, with a wide application range. By strictly controlling the synchronism of ADC sampling and the delay of calculation, the amplifier gain may be calculated more accurately.

A method and device for controlling a wavelength of a light emitting assembly. The device comprises a microcontroller, a light emitting assembly temperature control unit, an analog-to-digital converter, a digital-to-analog converter, a storage unit, a thermistor of a negative temperature coefficient in a TOSA component, and a TEC assembly. The microcontroller comprises an ADC input interface, a DAC output interface, a GPIO output interface, an external communication interface, and a memory interface. The light emitting assembly temperature control unit comprises a turn-off enable control circuit, a temperature detecting circuit, an error amplification-comparison-compensation unit, a TEC voltage/current limitation circuit, a TEC voltage/current detecting circuit, and a TEC differential voltage driver. The method and device are simple and flexible, implements a precise control of the wavelength, and also considers an adjustment function of the wavelength.

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 it is determined that 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.

Provided are a control method and system for a cascade hybrid amplifier, in which respective hybrid amplifiers in the cascade hybrid amplifier simultaneously start to implement a pump-starting process comprising: when the hybrid amplifier receives a request to start pumping, determining whether conditions are satisfied, if yes, determining stability of power of an input light of a Raman, starting pumping of an EDFA so that the EDFA enters into an APC operation mode; starting pumping of the Raman, and calculating a gain deviation according to the calculated input light powers before and after pump-starting of the Raman when no reflection alarm exists; and adjusting gain of the Raman according to the gain deviation, and switching to an AGC (automatic gain control) operation mode after the adjustment; and switching the EDFA to the AGC operation mode.

Disclosed is a gravity-adapted optical-fiber-connector comprising a gravity-adapted block and at least one gravity connector each including a fiber-stub; tail handle; rear seat being clamped and fixed by gravity-adapted block; elastic device being sleeved on a portion of excircle surface of tail handle and limited by an end face of rear seat and that of tail handle; outer sleeve and optical cable; gravity of gravity-adapted block is applied to elastic device through the end face of rear seat, after the elastic device is compressed, a spring having identical magnitude and direction with the gravity is generated and acted on the end face of tail handle, such that a physical butt-joint-surface of fiber-stub is always applied a preload about the gravity. The gravity-adapted optical-fiber-connector has stable optical-fiber coupling efficiency and coupling performance.

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 ( 2 ) formed by a parallel connection of a Child MZI ( 3 ) in an I path and a Child MZI ( 4 ) in a Q path. The debugging method comprises: fixing a bias voltage of one Child MZI of the Child MZI ( 3 ) in the I path and the Child MZI ( 4 ) in the Q path; gradually adjusting a bias voltage of the other Child MZI, testing a parent extinction ratio PER of the Parent MZI ( 2 ) 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 ( 2 ) 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 ( 2 ) 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 ( 2 ) until the parallel MZI electro-optical modulator reaches an optimum output effect, and determining the phase modulation voltage of the Parent MZI ( 2 ). The method and device are simple; and the debugging process thereof is fast and efficient.

The present disclosure relates to a technical field of optical communication, and more particularly to a device and method for matching optical fiber connections for ROADM service side, wherein the device comprises a reference control optical channel transmitter, a downlink WSS, a plurality of emitting ports, a reference control optical channel receiver, an uplink WSS and a plurality of receiving ports; the reference control optical channel transmitter emitting a reference control optical channel signal, and the downlink WSS emitting the reference control optical channel through the respective emitting ports in a polling manner; the reference control optical channel receiver receiving the reference control optical channel signal, and the uplink WSS selectively receiving the reference control optical channel over the plurality of receiving ports in the polling manner; wherein the reference control optical channel operating within an operating wavelength range of WSSs in the ROADM but outside a wavelength range of a service optical channel. By using WSS to control polling of the reference control optical channel among service side ports of ROADM, the present disclosure realizes an auto-routing matching of an optical fiber connection between different service side ports of ROADM and improves configuration efficiency, and at the same time, also realize to monitor performance of the optical fiber connection between service side ports of ROADMs in different directions and be a standby physical channel for chassis cascade.