λ ∼ 3.35μ m distributed-feedback quantum-cascade lasers with high-aspect-ratio lateral grating

Cockburn, J.W.; Ironside, C.N.; McKee, A.; Meredith, W.; Revin, D.G.; Slight, T.J.; Tandoi, G.; Zhang, S.Y.

λ ∼ 3.35μ m distributed-feedback quantum-cascade lasers with high-aspect-ratio lateral grating

Authors: J.W. Cockburn
C.N. Ironside
A. McKee
W. Meredith
D.G. Revin
T.J. Slight
G. Tandoi
S.Y. Zhang
Publication date: 1 January 2011
Publisher: 'Institute of Electrical and Electronics Engineers (IEEE)'
Doi

Abstract

We report the development of room-temperature distributed-feedback quantum-cascade lasers operating in a single mode in the 3.34 to 3.35 μm wavelength range. First-order lateral gratings with high aspect ratio (the ratio between the grating etch depth and its period) were formed using inductively coupled plasma etching. The as-cleaved lasers emit in pulsed regime with a sidemode suppression ratio of up to 24 dB and a peak single-mode output power of 130 mW from a single facet