Open AccessSingle mode quantum cascade lasers with shallow-etched distributed Bragg reflector
Author(s) -
Peter Fuchs,
Jochen Friedl,
Sven Höfling,
Johannes Koeth,
A. Forchel,
L. Worschech,
M. Kamp
Publication year - 2012
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.20.003890
Subject(s) - optics , distributed bragg reflector , materials science , laser , cascade , distributed bragg reflector laser , quantum cascade laser , optoelectronics , single mode optical fiber , crosstalk , semiconductor laser theory , physics , chemistry , chromatography
We report the fabrication of single mode quantum cascade lasers using a shallow-etched distributed Bragg reflector as frequency selective element. Quasi-continuous single mode tuning over 15 cm-1 at room temperature and 25 cm-1 via temperature tuning at Peltier temperatures is demonstrated. The behavior of both electro-optic and spectral characteristics under variation of the segment currents is analyzed, showing a maximum peak output power at room temperature of 600 mW. Thermal crosstalk between the laser segments is investigated. The spectral resolution of a gas absorption experiment is determined to be better than 0.0078 cm-1.