High-average-power, high-duty-cycle (λ∼6 μm) quantum cascade lasers

被引：32

作者：

Slivken, S ^{[1
]}

Evans, A ^{[1
]}

David, J ^{[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 | 2002年 / 81卷 / 23期

关键词：

D O I：

10.1063/1.1526462

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

High-power quantum cascade lasers emitting at lambda=6.1 mum are demonstrated. Accurate control of growth parameters and strain balancing results in a near-perfect lattice match, which leads to excellent material quality. Excellent peak power for uncoated lasers, up to 1.5 W per facet for a 21 mum emitter width, is obtained at 300 K for 30 period structures. The threshold current density at 300 K is only 2.4 kA/cm(2). From 300 to 425 K, the laser exhibits a characteristic temperature T-0 of 167 K. Next, Y2O3/Ti/Au mirror coatings were deposited on 1.5 mm cavities and mounted epilayer down. These lasers show an average output power of up to 225 mW at 17% duty cycle, and still show 8 mW average power at 45% duty cycle. (C) 2002 American Institute of Physics.

引用

页码：4321 / 4323

页数：3

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