Chinese Academy of Sciences

Shanghai Zhongke Shenguang Optoelectronics Industry Co., Ltd.

Zhiyong Lu

Huilong Zhu

Yu Chen Zhou

Huaxiang Yin

Yongkui Zhang

Yiqun Bruce Wang

Jianfeng Sun

Lijuan Wang

Zhiguo Zhao

Yueli Xi

Peipei Hou

An apparatus and method herein efficiently couple spatial light to optical fiber light for achieving stability of an optical axis without a position sensor. The basic concept of the method includes: first, obtaining, according to a theoretical coupling efficiency model, a model parameter by means of fitting calculation; second, using a four-point tracking algorithm to calculate an optical fiber nutation trajectory according to the optical fiber nutation principle; and finally, using the nutation trajectory to calculate the position deviation of a central point. The optical axis is ensured to be stable by correcting the position deviation, and the high coupling efficiency remains. The method is used for the stability of the optical axis in a space coherent laser communication DPSK link. The high efficiency coupling is a key technology of long-distance, high bit rate transmission in space laser communication, and is significant in the development of inter-satellite optical communications.

Apparatus and method for coupling the spatial light to the optical fiber light for achieving the stability of an optical axis without a position detector

A semiconductor device is provided that has a plurality of Fin structures extending on a substrate along a first direction; a gate stack structure extending on the substrate along a second direction and across the plurality of Fin structures, wherein the gate stack structure comprises a gate conductive layer and a gate insulating layer, and the gate conductive layer is formed by a doped poly-semiconductor; trench regions in the plurality of Fin structures and beneath the gate stack structure; and source/drain regions on the plurality of Fin structures and at both sides of the gate stack structure along the first direction. A method of manufacturing a semiconductor device is also provided.

Semiconductor device and method for manufacturing the same

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Shanghai, China

Zhiyong Lu