標題: Fine-tuning of a diode laser wavelength with a liquid crystal intracavity element
作者: Lan, YP
Chen, CY
Pan, RP
Pan, CL
電子物理學系
光電工程學系
Department of Electrophysics
Department of Photonics
關鍵字: external-cavity diode laser;nematic liquid crystal;frequency tuning
公開日期: 1-一月-2004
摘要: A novel and simple approach for fine-tuning a laser wavelength is proposed and demonstrated. The key element is a planarly aligned nematic liquid crystal (NLC) cell inserted between the grating and end mirror of an external-cavity semiconductor laser (ECL). Varying the voltage driving the NLC cell, causes its extraordinary index of refraction to change due to field-induced reorientation of the LC director. This is equivalent to tuning the laser cavity length. As a result, the laser wavelength can be continuously tuned. With a 35.5-/mum-thick NLC cell, the output frequency of the present laser can be continuously tuned over 4 GHz. The root mean square driving voltage required is 1.5 V or less. The tuning range is in good agreement with the theoretical predictions. (C) 2004 Society of Photo-Optical Instrumentation Engineers.
URI: http://dx.doi.org/10.1117/1.1629684
http://hdl.handle.net/11536/27184
ISSN: 0091-3286
DOI: 10.1117/1.1629684
期刊: OPTICAL ENGINEERING
Volume: 43
Issue: 1
起始頁: 234
結束頁: 238
顯示於類別:期刊論文


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