期刊
MEASUREMENT SCIENCE AND TECHNOLOGY
卷 15, 期 1, 页码 N6-N9出版社
IOP PUBLISHING LTD
DOI: 10.1088/0957-0233/15/1/N02
关键词
frequency stabilization; line narrowing; semiconductor laser; extended cavity; interferometry; spectroscopy
The design of a tunable extended-cavity semiconductor laser based on the modified Littman configuration is described. The mechanics of the extended cavity is designed with respect to applications as a stabilized laser source for an etalon of optical frequency, a laser for interferometry where stability, narrow linewidth, and mode hop free tuning range are required and for spectroscopic purposes with similar requirements. It follows the contradicting demands for a rigid construction and fine adjustability of the optical components. Optimisation of the optical feedback level and its influence of the laser behaviour are discussed and a method for the feedback level adjustment by rotation of the polarization plane is proposed. The laser parameters are presented for a version based on a laser diode operating at a wavelength of 633 nm.
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