Room-temperature, high-power, and continuous-wave operation of distributed-feedback quantum-cascade lasers at λ∼9.6 μm

S. R. Darvish*, S. Slivken, A. Evans, J. S. Yu, M. Razeghi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

High-power continuous-wave (cw) operation of distributed-feedback quantum-cascade lasers is reported. Continuous-wave output powers of 100 mW at 25 °C and 20 mW at 50 °C are obtained. The device exhibits a cw threshold current density of 1.34 kA cm2, a maximum cw wall-plug efficiency of 1% at 25 °C, and a characteristic temperature of ∼190 K in pulsed mode. Single-mode emission near 9.6 μm with a side-mode suppression ratio of ≥30 dB and a tuning range of 2.89 cm-1 from 15 to 50 °C is obtained.

Original languageEnglish (US)
Article number201114
JournalApplied Physics Letters
Volume88
Issue number20
DOIs
StatePublished - May 15 2006

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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