Ezconn Corporation

Chorum Technologies Inc.

Shuxin Li

Tiejun J Xia

Kuang-Yi Wu

Jian-Yu Liu

Ming Xu

Tizhi Huang

Chongchang Mao

Chi-Hao Cheng

Wei Feng

Tirun Lin

Minchun Li

An optical device for processing an optical signal includes a crystal wedge, a polarization modulator, and a reflective element. The crystal wedge spatially separates an input optical signal into a first beam component having a first polarization state and a second beam component having a second polarization state. The crystal wedge has an optical axis arranged at an optical axis angle such that the first beam component and the second beam component converge. The polarization modulator changes the polarization state of the first beam component and the polarization state of the second beam component in response to a control signal. The reflective element reflects the first beam component and the second beam component such that the crystal wedge spatially recombines a portion of the first beam component having the second polarization state with a portion of the second beam component having the first polarization state to form an output optical signal.

Variable optical attenuator using crystal wedges

An optical device comprises a first birefringent crystal having a first length, a second birefringent crystal having a second length, and a dynamic polarization rotator. An optical signal propagating through the first and second birefringent crystals has an effective optical path length based, at least in part, upon the first length of the first birefringent crystal and the second length of the second birefringent crystal. The dynamic polarization rotator adjusts the effective optical path length of the optical signal in response to a control signal.

Bandwidth variable wavelength router and method of operation

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Plano, TX, United States of America

Shuxin Li