Measurements of the alpha factor of a distributed-feedback quantum cascade laser by an optical feedback self-mixing technique.
نویسندگان
چکیده
We demonstrate measurements of the alpha factor of a distributed-feedback quantum cascade laser (QCL) by using a newly modified self-mixing interferometric technique exploring the laser itself as the detector. We find a strong dependence of the alpha factor on the injection current, ranging from -0.44 at 120 mA to 2.29 at 180 mA, which can be attributed to the inherent physics of QCLs.
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عنوان ژورنال:
- Optics letters
دوره 31 17 شماره
صفحات -
تاریخ انتشار 2006