Accelink Technologies Co., Ltd.

Wuhan Telecommunication Devices Company

Liping Sun

Yongan Fu

Qianggao Hu

Liu Yang

Di Zhang

Weidong Ma

Chenggang Liu

Rui Yang

Zhilin Yuan

Hui Xie

Bo Zhang

Jun Zhang

Yuan Zhang

Xianghong Yu

Baiquan Hu

Xuerui Liang

Fei Liang

Leilei Hu

Hu Zhu

Rikai Zhou

Zhenfeng Xue

Ben Chen

Yan Chen

Meng Wang

Yanfeng Fu

Yong Luo

Shenglei Hu

Xuesheng Tang

Shiyu Li

Jinping Guo

Yuhong Ma

Yin Zhang

Lidan Song

Lihong Tang

Chao Luo

Qingyan Yue

Shuihua Liu

Chaoqun Wu

Hehui Wu

Yaping Lu

Lijuan Wang

Wenjuan He

Dingkang Chen

Yuanzhong Xu

Xiaoping Wu

Hongyang Liu

Shujian Du

Yanling Guo

Tingyu Li

Fen Xiong

Yaping Lv

Ting Gao

Shuang Chen

Disclosed are an optical module, an optical communication device and an optical transmission system. The optical module includes a housing; a main board where are arrange a first transmitting unit and a first receiving unit; a first optical circulator, a first port of which is connected to an output end of the first transmitting unit, and a third port of which is connected to an input end of the first receiving unit; and a first optical fiber adapter connected to a second port of the first optical circulator, wherein an optical signal from the output end of the first transmitting unit is transmitted to the second port along the first port of the first optical circulator; and the first optical fiber adapter receives an optical signal input from outside, and transmits it to the third port along the second port of the first optical circulator.

Optical module

Disclosed are an optical assembly and a manufacturing method therefor. The optical assembly comprises a laser component () and a crystal (). The crystal () is disposed on the laser component (). The laser component () is used to produce a laser beam. The crystal () is used to split the laser beam incident onto the crystal () so as to generate a first beam () and a second beam (). The first beam () is used for front light emission and the second beam () is used for backlight monitoring. The optical assembly can split a laser beam to achieve the backlight monitoring function without adding a splitter film. It has good stability in light splitting and reduces the risk of failure in an optical device.

Optical assembly and manufacturing method thereof

An optical-path-displacement-compensation-based emission optical power stabilization assembly, comprising: a laser, a lens, and an optical fiber coupling port disposed on a first substrate and a second substrate according to a preset arrangement scheme, wherein an expansion coefficient of the second substrate is larger than that of the first substrate, and the preset arrangement scheme enables initial distances between the laser and the lens, between the lens and the optical fiber coupling port, and/or between the laser and the optical fiber coupling port to differ from respective optical coupling distances from an optical coupling point by a preset value, thereby ensuring that a coupling loss on an optical path changes along with the temperature, forming a complementary effect with respect to an optical power-temperature curve of the laser, which reduces a temperature-caused fluctuation of the emission optical power of an optical assembly.

Optical path displacement compensation-based transmission optical power stabilization assembly

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 method and an apparatus for compensating for wavelength drift are disclosed. The method includes: generating, by a burst control circuit, a burst bias current; sending, by the burst control circuit, the burst bias current to a light emitting part and a trigger; converting, by the trigger, the received burst bias current into burst DA data; sending, by the trigger, the burst DA data to a synthesizer circuit; receiving, by the synthesizer circuit, the burst DA data sent by the trigger and the calibrated DA data sent by the MCU respectively; synthesizing, by the synthesizer circuit, the burst DA data and the calibrated DA data to obtain a synthesized signal; and sending, by the synthesizer circuit, the synthesized signal to a temperature control part.

Method and apparatus for compensating for wavelength drift

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

Embodiments of the present invention relate to method and device for measuring optical signal-to-noise ratio (OSNR). A method for measuring an OSNR of a signal of interest may comprise: obtaining spectrum of the signal of interest, the spectrum including power spectrum density distribution of the signal of interest in a channel bandwidth B; obtaining spectrum of a comparative signal that has the same spectrum characteristics as but different OSNR than the signal of interest, the spectrum including power spectrum density distribution of the comparative signal in the channel bandwidth B; and calculating the OSNR of the signal of interest by using the spectrum of the signal of interest and the spectrum of a comparative signal.

Method and device for measuring optical signal-to-noise ratio

A BOSA device having an adjustable wavelength in two directions comprises a signal transmitter section and a signal receiver section, wherein the signal transmitter section sequentially includes a laser (-), a semiconductor optical amplifier (SOA) (-), a splitter (-), a data upload and download port (-), and a first TEC temperature control module (-) to control temperature of the laser (-) so as to adjust its output wavelength, and the signal receiver section sequentially includes a filter (-), a photo detector (-), and a receiving end driving device to change an angle of the filter (-) with respect to the optical path so as to make a passing wavelength of the filter adjustable. The first TEC temperature control module (-) controls temperature of the laser (-), and the receiving end driving device drives the filter (-) to change an angle of the filter with respect to the optical path.

BOSA device having adjustable wavelength in two directions

A multicast exchange optical switch includes an input port device including M input ports, an output port device including N output ports, a diffractive beam splitter, an optical focusing component, and a 1&#xd7;N array of reflective devices. The diffractive beam splitter diffracts each input signal beam from the input ports into at least N directions. The optical focusing component includes a first focusing lens and a second focusing lens. The first focusing lens focuses sub-beams from the respective input ports along the Y-axis direction having the same diffraction order. The second focusing lens focuses on the X-axis direction sub-beams from the same input port having different diffraction orders. The 1&#xd7;N array of reflective devices is provided at the focal plane of the optical focusing component and each reflective device reflects a sub-beam from any one of the input ports to any one of the output ports.

Multicast exchange optical switch

A method for compensating for a wavelength shift in a wavelength selective switch (WSS), and a device therefor. The device comprises a fixed seat () as well as a rotation beam () and a compensation block () that have different thermal expansion amounts, the rotation beam () and the compensation block () being fixedly adhered to the fixed seat (). In the method, a combined structure of the rotation beam () and the compensation block () with different thermal expansion amounts is adopted; the combined structure rotates by means of different expansion amounts generated by the rotation beam () and the compensation block () at the same external temperature, and further drives an optical element of the WSS to rotate, hence compensating for a wavelength shift of the WSS. The method is safe and reliable; the device has a simple structure, and is convenient to encapsulate, is applicable to various WSS optical paths, and does not affect advantages of the optical path structure of the WSS.

Method for compensating for wavelength shift in wavelength selective switch, and device therefor

A multicast optical switch based on free-space transmission comprises a 1&#xd7;M input collimator array, a light splitting device, an optical distance compensation device, a spot transformation device, a 1&#xd7;N output collimator array and a reflector array which are arranged in sequence. The 1&#xd7;N output collimator array corresponds to reflector array. The light splitting device is provided with a light splitting surface and a reflection surface, and by means of light splitting surface and reflection surface, light splitting and beam splitting of n times are carried out on input signals of 1&#xd7;M input collimator array, and then N beams of sub-signal light are generated. The optical distance compensation device compensates optical distance differences among M&#xd7;N sub-signal light beams produced by light splitting device. The M&#xd7;N sub-signal light beams are focused to be 1&#xd7;N light spots through light spot conversion device, and then 1&#xd7;N light spots are reflected to reflector array.

Multicast optical switch based on free-space transmission

A wavelength selective switch (WSS) with hitless switching. The WSS includes the fiber collimator array, the focusing lens, collimating lens, diffraction grating, focusing lens, and attenuation reflection unit array. Each attenuation reflection unit has an interconnected transmission-type MEMS attenuator and a one-dimension MEMS reflector. The transmission-type MEMS attenuator is positioned in the front of the one-dimension MEMS reflector. The central axis of the transmission-type MEMS attenuator aligns and coincides with that of the one-dimension MEMS reflector, with the two central axes being glued together. The WSS of the present invention effectively utilizes the combination of a one-dimension reflector array and a transmission-type optical attenuator chip. With the use of one-dimension reflector array, instead of the known two-dimension reflector array, the complexity of design and manufacture is greatly reduced, thereby reducing the production costs of the switch.

WSS with hitless switching

An integrated optical-power adjustable WDM is provided, which has a plurality of channels, each channel having a first input port, a second output port and a third output port, the second output port of one channel being connected to the first output port of the next channel, the first port of each channel having a waveguide, the third port of each channel having a waveguide, each channel comprising a pair of collimating elements composed of a first collimating element and a second collimating element, a thin film filter and a tunable optical filter chip functioning as a variable optical attenuator, wherein the tunable optical filter chip is set between the thin film filter and the third output port for each channel, thereby the respective tunable optical filter chip is integrated into the corresponding internal optical path for each channel of WDM to achieve optical-power control for each channel of the WDM.

Integrated optical-power adjustable WDM

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Wuhan, China

Liping Sun