High-performance midinfrared quantum cascade lasers

被引：153

作者：

Capasso, Federico ^{[1
]}

机构：

[1] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA

来源：

OPTICAL ENGINEERING | 2010年 / 49卷 / 11期

关键词：

quantum cascade lasers; laser arrays; high power; broadband; single mode; CONTINUOUS-WAVE OPERATION; MU-M; ROOM-TEMPERATURE; SEMICONDUCTOR-LASER; ARRAYS;

D O I：

10.1117/1.3505844

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The design and operating principles of quantum cascade lasers (QCLs) are reviewed along with recent developments in high-power cw and broadband devices. Cw power levels of several watts at room temperature have been achieved at 4.6-mu m wavelength; broadband single-mode tuning (approximate to 400 cm(-1)) has been achieved using an external-cavity QCL with a grating as a tuning element. An alternative approach, consisting of a monolithically integrated array of single-mode QCLs individually currentdriven by a microcontroller, has led to broadband single-mode tuning over a range of 200 cm(-1) without requiring the use of moving parts. This spectrometer on a chip holds promise for high-brightness compact trace-gas sensors capable of operating in harsh environments. (C) 2010 Society of Photo-Optical Instrumentation Engineers. [DOI: 10.1117/1.3505844]

引用

页数：9

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