High-power, room-temperature, and continuous-wave operation of distributed-feedback quantum-cascade lasers at λ∼4.8 μm -: art. no. 041104

被引：106

作者：

Yu, JS ^{[1
]}

Slivken, S ^{[1
]}

Darvish, SR ^{[1
]}

Evans, A ^{[1
]}

Gokden, B ^{[1
]}

Razeghi, M ^{[1
]}

机构：

[1] Northwestern Univ, Dept Elect & Comp Engn, Ctr Quantum Devices, Evanston, IL 60208 USA

来源：

APPLIED PHYSICS LETTERS | 2005年 / 87卷 / 04期

关键词：

D O I：

10.1063/1.2000343

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A high-power continuous-wave (CW) operation of distributed-feedback quantum-cascade lasers using a buried grating with epitaxial regrowth up to temperatures of above 60 degrees C is demonstrated. For a high-reflectivity-coated 13 mu m-wide and 3 mm-long cavity, CW output powers of 135 mW at 25 degrees C and still 37 mW at 60 degrees C are obtained. The device exhibits a CW threshold current density of 1.1 kA/cm(2), a maximum CW wall-plug efficiency of 1.48% at 25 degrees C, and a characteristic temperature of 177 K in pulsed mode. Single-mode emission near 4.8 mu m with a side-mode suppression ratio of > 30 dB and a tuning range of similar to 8.1 cm(-1) (i.e., tunability of 0.18 cm(-1)/K) in the temperature range from 15 to 60 degrees C is observed. (c) 2005 American Institute of Physics.

引用

页数：3

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