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 |