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An optical tunable filter array based on LCOS phase grating
Author(s): Dong Feng; Zhujun Wan; Xu Chen; Shijia Yan; Zhixiang Luo
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Paper Abstract

This paper reports an optical tunable filter array (TFA) based on a LCOS (liquid crystal on silicon) chip. The input broadband optical beam is first dispersed by a bulk grating and then incident on the LCOS chip. The LCOS chip is phase-only modulated and constructed as a dynamic reflective phase grating. The phase modulation is adjusted to meet the Littrow angle for a specified passband wavelength and thus the optical beam corresponding to this wavelength is steered to the output. The input/output optical beams are coupled to optical fibers with a dual-fiber collimator. Four dualfiber collimators are vertically aligned as the inputs/outputs and the pixels of the LCOS chip are vertically allocated as four independent zones. Thus the device can act as a 4-channel TFA, which is assembled and functionally demonstrated.

Paper Details

Date Published: 10 January 2018
PDF: 5 pages
Proc. SPIE 10617, 2017 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Optical Signal Processing, 106170M (10 January 2018); doi: 10.1117/12.2295161
Show Author Affiliations
Dong Feng, Huazhong Univ. of Science and Technology (China)
Zhujun Wan, Huazhong Univ. of Science and Technology (China)
Xu Chen, Huazhong Univ. of Science and Technology (China)
Shijia Yan, Huazhong Univ. of Science and Technology (China)
Zhixiang Luo, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 10617:
2017 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Optical Signal Processing
Liquan Dong; Yi Dong; Jian Chen; Fabien Bretenaker, Editor(s)

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