Measurement of gain and losses of a midinfrared quantum cascade laser by wavelength chirping spectroscopy

被引：13

作者：

Benveniste, E. ^{[1
]}

Laurent, S. ^{[1
]}

Vasanelli, A. ^{[1
]}

Manquest, C. ^{[1
]}

Sirtori, C. ^{[1
]}

Teulon, F. ^{[2
]}

Carras, M. ^{[2
]}

Marcadet, X. ^{[2
]}

机构：

[1] Univ Paris Diderot, Lab Mat & Phenomenes Quant, CNRS, UMR 7162, F-75205 Paris 13, France

[2] Alcatel Thales 3 5 Lab, F-91767 Palaiseau, France

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 08期

关键词：

distributed feedback lasers; laser beams; quantum cascade lasers; semiconductor lasers; spectroscopy;

D O I：

10.1063/1.3089570

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present an optimized technique for the measurement of gain and losses of semiconductor lasers. We optically inject the beam of a distributed feedback laser (DFB) inside the cavity of the lasers under study. The DFB laser operates in a pulsed mode and shifts its emission wavelength as a function of time. This frequency chirp creates the Fabry-Perot fringes of the transmitted intensity that contains all the information on the cavity losses. The setup has been validated by a quantitative study of the losses as a function of the injected current, for a quantum cascade laser emitting at 7.6 mu m.

引用

页数：3

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