Open AccessQuantum cascade laser in a master oscillator power amplifier configuration with Watt-level optical output power
Author(s) -
Borislav Hinkov,
Mattias Beck,
E. Gini,
Jérôme Faist
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.019180
Subject(s) - optics , amplifier , cascade , laser , quantum cascade laser , watt , physics , power (physics) , optoelectronics , single mode optical fiber , wavelength , materials science , chemistry , cmos , chromatography , quantum mechanics
We present the design and realization of short-wavelength (λ = 4.53 μm) and buried-heterostructure quantum cascade lasers in a master oscillator power amplifier configuration. Watt-level, singlemode peak optical output power is demonstrated for typical non-tapered 4 μm wide and 5.25 mm long devices. Farfield measurements prove a symmetric, single transverse-mode emission in TM(00)-mode with typical divergences of 25° and 27° in and perpendicular to growth direction, respectively. We demonstrate singlemode tuning over a range of 7.9 cm(-1) for temperatures between 263K and 313K and also singlemode emission for different driving currents. The side mode suppression ratio is measured to be higher than 20 dB.