Accelink Technologies Co., Ltd.

Wuhan Telecommunication Devices Company

Weidong Ma

Di Zhang

Kun Qian

Yanfeng Fu

Shenglei Hu

Xuesheng Tang

Liping Sun

Yongan Fu

Chenggang Liu

Yi Tang

Xuerui Liang

Qianggao Hu

Shiyu Li

Xianghong Yu

Baiquan Hu

Ben Chen

Wei Du

Bo Zhang

Cuihong Zhang

Yi Hu

Yizong Chen

Jiuhong Ling

Zhi Yang

Ding Li

Hualin Yin

Qionghui Song

Zhao Huang

Di Li

Xiaohui Xu

Jiecong Huang

Chuan Shi

Huali Xi

Xiong Jiang

Disclosed are a signal demodulation method and apparatus, a computer storage medium and a device. The method comprises: acquiring a signal to be demodulated; performing direct current blocking and bias processing on the signal to obtain a processed signal; comparing the processed signal with a preset decision signal, and obtaining a demodulation signal according to a comparison result. Thus, direct current blocking processing on a modulation signal can avoid dynamic changes of DC components caused by average power changes of carrier signals, avoiding wrongly demodulating the modulation signal. Bias processing after the direct current blocking on the modulation signal can further realize an AC signal decision without introducing a negative pressure source. A real-time decision on the processed signal via the preset decision signal can dynamically adapt the average power of carrier signals, thereby ensuring to correctly demodulate the modulation signal and improving the accuracy of demodulation results.

Signal demodulation method and apparatus, computer storage medium and device

A heating electrode for lowering stress of a light waveguide and a VOA. The heating electrode is provided on an upper cladding layer () of a PLC waveguide. The heating electrode is formed by combining two or more sub-heating electrodes () arranged at internals. Adjacent sub-heating electrodes () are connected by means of conductive electrodes () having a conductive function. By dividing a complete elongated heating electrode into a plurality of sub-heating electrodes (), 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.

Heating electrode for lowering stress of light waveguide and VOA thereof

A coupling structure includes a single mode active device and a planar optical waveguide. Specifically, the planar optical waveguide includes a silica waveguide for transmitting an optical signal, where the silica waveguide includes a coupling section and a conduction section; the coupling section is of a regular trapezoidal structure or an inverted trapezoidal structure, where a surface of the coupling section coupled to the single mode active device is a trapezoid top, and a surface of the coupling section connected with the conduction section is a trapezoid bottom; and a coupling gap is preset between the single mode active device and the planar optical waveguide.

Planar optical waveguide structure, and coupling structure thereof and coupling method thereof

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

The present invention provides a wavelength division multiplexing/demultiplexing optical transceiving assembly based on a diffraction grating, which is an uplink optical emitting unit and a downlink optical receiving unit that comprise a laser chip array, a light receiving detector array, a first fast axis collimating lens, a second fast axis collimating lens, a first slow axis collimating lens, a diffraction grating, a slow axis focusing lens, a second slow axis collimating lens, an optical isolator, a coupling output lens, a coupling input lens, a coupling outputting optical fiber and a coupling inputting optical fiber. The wavelength division multiplexing/demultiplexing optical transceiving assembly solves the technical problem of sharing a diffraction grating to realize a wavelength division multiplexing/demultiplexing function, achieves the beneficial effects of better diffraction grating filtering property, smaller light path coupling loss and insertion loss correlative with wavelength, larger independent optical element sizes, and simpler assembly process, and is more suitable for manufacturing a multi-channel wavelength division multiplexing/demultiplexing optical transceiving assembly.

Wavelength division multiplexing/demultiplexing optical transceiving assembly based on diffraction grating

An arrayed waveguide grating based hybrid integrated laser has an adjustable external cavity. The waveguide includes a semiconductor gain die and an optical waveguide chip. The optical waveguide chip includes an arrayed waveguide grating and an arrayed waveguide reflection-controllable component. A resonant cavity is formed by the output end reflection-controllable arrayed waveguide grating chip and the semiconductor gain die. An output wavelength of the laser can be adjusted by changing a driving condition of the reflection-controllable component. The output wavelength is determined by a center wavelength of each channel of the arrayed waveguide grating.

Arrayed waveguide grating based hybrid integrated laser having adjustable external cavity

A wavelength-tunable external cavity laser comprises a semiconductor optical amplifier chip and a laser external cavity, the laser external cavity comprising a grid filter, a phase adjustor and a silicon-based micro-ring chip, the grid filter and the silicon-based micro-ring chip constituting a wavelength-tunable optical filter which implements wavelength tuning by spectral tuning of the grid filter and/or the silicon-based micro-ring chip. A micro-ring filter in the silicon-based micro-ring chip of the tunable external-cavity laser is manufactured by adopting a mature silicon light technology, which can greatly reduce a manufacturing difficulty of the adjustable filter, and reduce the manufacturing cost of a device. An existing external-cavity adjustable technology platform may be used for smooth transition, so as to improve the degree of integration of this type of device and simplify a preparation process.

Wavelength-tunable external-cavity laser and adjustable light emission module

A silicon waveguide coupling alignment apparatus includes a fine adjustment bracket, a stress releasing clamp and a silicon photonic integrated chip force sensor. A silicon photonic integrated chip is fixed on the silicon photonic integrated chip force sensor, at least a part of an optical fiber to be coupled is fixed on one end of the stress releasing clamp, the stress releasing clamp is arranged on the fine adjustment bracket, an end surface of the optical fiber to be coupled is aligned with an end surface of the silicon photonic integrated chip by adjusting a position of the fine adjustment bracket, and a cushioning mechanism is arranged within the stress releasing clamp to cushion a collision force in a direction perpendicular to the end surface of the optical fiber to be coupled. The contact force imposed by the optical fiber on the end surface of the chip can be released by the clamp.

Silicon waveguide coupling alignment apparatus

A performance testing device for a multi-channel tunable laser, comprising a collimating and coupling lens, a first beam splitter, a power testing unit, a side-mode suppression ratio testing unit, a wavelength testing unit and a control and drive unit, the power testing unit being positioned in a reflection path of the first beam splitter, the wavelength testing unit being positioned in a transmission path of the first beam splitter, the side-mode suppression ratio testing unit being positioned in a reflection path of the second beam splitter, the control and drive unit being in a control connection with the power testing unit, the side-mode suppression ratio testing unit and the wavelength testing unit. The performance testing device has a simple structure, a low cost, and is convenient to use.

Performance testing device for multi-channel tunable laser

Device and method are provided to align and bond a lens array to a PD array with high precision, which can implement aligning and bonding of the lens array automatically. A telescopic rod of the stepping actuator is adjusted until photosensitive areas of the PD array form a clear image on the image acquisition CCD through the lens array, an adjusted distance h1 of the telescopic rod is recorded, and a position coordinate (xn, yn) of center of each circular photosensitive area in the image may be obtained, and a slope k1 of a line connecting the centers of the photosensitive areas is calculated. The telescopic rod is adjusted again, and a slope k2 of a line connecting the centers of the apertures of the lens array is calculated. Based on calculated values &#x394;xn, &#x394;yn, arctan(k1)&#x2212;arctan(k2), the high-resolution adjustment stage is adjusted to adjust position of the lens array.

Device and method for aligning and bonding lens array and PD array with high precision

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Wuhan, China

Weidong Ma