通过部分反射器的光反馈实现的单模、窄线宽外腔量子级联激光器。

Single-mode, narrow-linewidth external cavity quantum cascade laser through optical feedback from a partial-reflector.

作者信息

Cendejas Richard A, Phillips Mark C, Myers Tanya L, Taubman Matthew S

机构信息

Department of Electrical Engineering, Princeton University, Princeton, NJ 08540, USA.

出版信息

Opt Express. 2010 Dec 6;18(25):26037-45. doi: 10.1364/OE.18.026037.

DOI:10.1364/OE.18.026037

PMID:21164951

Abstract

An external-cavity (EC) quantum cascade (QC) laser using optical feedback from a partial-reflector is reported. With this configuration, the otherwise multi-mode emission of a Fabry-Perot QC laser was made single-mode with optical output powers exceeding 40 mW. A mode-hop free tuning range of 2.46 cm(-1) was achieved by synchronously tuning the EC length and QC laser current. The linewidth of the partial-reflector EC-QC laser was measured for integration times from 100 μs to 4 seconds, and compared to a distributed feedback QC laser. Linewidths as small as 480 kHz were recorded for the EC-QC laser.

摘要

报道了一种利用部分反射器的光反馈的外腔（EC）量子级联（QC）激光器。采用这种配置，法布里-珀罗QC激光器原本的多模发射被转换为单模，光输出功率超过40 mW。通过同步调节外腔长度和QC激光器电流，实现了2.46 cm⁻¹的无模式跳变调谐范围。测量了部分反射器EC-QC激光器在100 μs至4秒积分时间内的线宽，并与分布反馈QC激光器进行了比较。EC-QC激光器记录到的线宽小至480 kHz。