標題: Liquid-crystal-based tunable filter for WDM (lambda=1550 nm)
作者: Pan, CL
Huang, MJ
Pan, RP
電子物理學系
李立台揚網路研究中心
光電工程學系
Department of Electrophysics
Lee MTI Ctr
Department of Photonics
關鍵字: DWDM;liquid crystal;optical filter;router;spatial tight modulator;switch
公開日期: 2004
摘要: We report a new configuration of tunable optical filter for DWDM applications. In this design, first-order diffracted signal light by a grating is directed to a lens and focused on to a transmission-type liquid crystal spatial light modulator (LC-SLM). Wavelength channels are selected by opening the appropriate pixels of the LC-SLM for transmission. Filtering into 15 channels of the 1550 nm band is demonstrated in the initial experiment. The channels are designed according to the International Telecommunication Union (ITU) grid with channel spacing of 100 GHz. Channel crosstalk is less than -30dB. The average I dB, 3 dB, and 30 dB passbands of the filter are 0.07 nm, 0.13 nm, and 0.91 nm, respectively. The extinction ratio can be as high as 24.7 dB.
URI: http://hdl.handle.net/11536/27188
http://dx.doi.org/10.1080/15421400490439301
ISSN: 1058-725X
DOI: 10.1080/15421400490439301
期刊: MOLECULAR CRYSTALS AND LIQUID CRYSTALS
Volume: 413
起始頁: 2697
結束頁: 2704
Appears in Collections:Conferences Paper


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