Electro-optical polarization controller based on Solc filter in periodically poled lithium niobate

Jianhong Shi; Xianfeng Chen; YuXing Xia; Yingli Chen

doi:10.1117/12.481047

29 August 2002 Electro-optical polarization controller based on Solc filter in periodically poled lithium niobate

Jianhong Shi, Xianfeng Chen, YuXing Xia, Yingli Chen

Proceedings Volume 4905, Materials and Devices for Optical and Wireless Communications; (2002) https://doi.org/10.1117/12.481047
Event: Asia-Pacific Optical and Wireless Communications 2002, 2002, Shanghai, China

Abstract

Polarization controller (PC) for optical fiber is a major area of study in the general field of coherent-optical communication systems. In communication systems based on single-mode fiber, the states of polarization in fiber vary randomly due to temperature variations and mechanical perturbations along the fiber. These polarization changes can have a detrimental impact on polarization sensitive components. Recently, more and more research attentions have been paid to a new artificial nonlinear material: the periodically poled LiNbO₃ (PPLN) because of its outstanding nonlinear optical properties. In this paper, we analytically proposed an electrical tuned polarization controller based on a single chip of Z-cut LiNbO₃ crystal. The first part is a Z-cut lithium niobate and the second part is periodically poled. The electric field is applied along the transverse and longitude directions for the separated part to implement the electro-optical polarization controller, respectively. With two electric fields applied by special control algorithms, the first part can transform an incident light with arbitrary ellipsoid polarization into a linearly polarized light and the second part will turn this linearly polarized light to a fixed linearly polarized light. Furthermore, if we use PPLN waveguide to fabricate such a device, only about 10V maximum driven voltage is needed for each stage, which is very attractive.

Citation Download Citation

Jianhong Shi, Xianfeng Chen, YuXing Xia, and Yingli Chen "Electro-optical polarization controller based on Solc filter in periodically poled lithium niobate", Proc. SPIE 4905, Materials and Devices for Optical and Wireless Communications, (29 August 2002); https://doi.org/10.1117/12.481047

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KEYWORDS

Polarization

Crystals

Electro optics

Electronics

Lithium niobate

Polarization control

Telecommunications

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