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Optical attenuator based on phase modulation of a spatial light modulator

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Abstract

In this Letter, we propose an optical attenuator based on the phase modulation of a spatial light modulator (SLM). In this system, we use two polarized beam splitters (PBSs) to control the polarized light and one SLM to modulate the phase of the polarized light. In the initial state, the light beam is divided into p-light and s-light when it passes through the first PBS. When the light passes through the second PBS, s-light is reflected and p-light is detected by the CCD camera. By loading different grayscales on the SLM, p-light changes its polarized state to s-light. The light power can be attenuated during the loading process. Our experiment shows that the system can obtain a wide optical attenuation from 1–27.2 dB. When loading two grayscales, the SLM has a fast switching time of 25 ms under a low actuated voltage of 5.5 V. The response time of the optical attenuator depends on the switching time of the SLM. Therefore, the system can also have a fast response time. By using the method of spatial multiplexing and adding two mirrors in the system, it can also be extended into a 1 \times 2 optical switch. The results verify its feasibility. The optical attenuator has wide applications in photonic signal processing and fiber-optic communication.

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DOI:10.3788/col201513.082301

所属栏目:Optical devices

责任编辑:张雁

收稿日期:2015-03-31

录用日期:2015-04-29

网络出版日期:2015-05-28

作者单位    点击查看

Chao Liu:School of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China
Di Wang:School of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China
Lixiao Yao:School of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China
Lei Li:School of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China
Qionghua Wang:School of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China

联系人作者:联系作者(qhwang@scu.edu.cn)

备注:This work was supported by the National Natural Science Foundation of China (Nos. 61225022 and 61320106015), the National "973" Program of China (No. 2013CB328802), and the National "863" Program of China (Nos. 2015AA015902 and 2012AA011901).

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引用该论文

Chao Liu, Di Wang, Lixiao Yao, Lei Li, Qionghua Wang, "Optical attenuator based on phase modulation of a spatial light modulator," Chinese Optics Letters 13(8), 082301 (2015)

被引情况

【1】Bin Zhang,Shiyu Liu,Xianzhu Tang,and Jian'gang Lu. Adaptive modulation system for liquid crystal phase modulator. Chinese Optics Letters, 2016, 14(9): 90604-90607

CrossRef返回数据

【1】Di Wang, De-Hong Wang, Chuan Shen, Chao Liu, Qiong-Hua Wang. Adjustable Aperture Based on the Phase Modulation of Spatial Light Modulator. Journal of Display Technology, 2016, 12(5): 447 

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