7 March 2016 Type-I QW cascade diode lasers for spectral region above 3 μm
Author Affiliations +
Proceedings Volume 9767, Novel In-Plane Semiconductor Lasers XV; 976703 (2016) https://doi.org/10.1117/12.2208933
Event: SPIE OPTO, 2016, San Francisco, California, United States
Abstract
Cascade pumping of type-I quantum well gain sections was utilized to increase output power and efficiency of GaSb-based diode lasers operating in spectral region from 3.1 to 3.3 μm. The experiment showed that the increase of the number of cascades from two (previously used in record cascade 3 μm emitters) to three led to critical enhancement of the differential gain and reduction of the threshold current density of λ > 3 μm lasers. Light p-doping of the AlGaAsSb graded section did not introduce extra optical loss but aided hole transport as required for realization of the efficient multi-stage cascade pumping scheme. Corresponding coated three-stage devices with ~100-μm-wide aperture and 3-mm-long cavity demonstrated CW output power of 500 mW near 3.18 μm at 17 °C – more than twofold increase as compared to previous state-of-the-art diode lasers emitting only 200 mW. Three-stage lasers with quantum wells designed to emit in the middle of methane absorption band near 3.25 μm demonstrated record output power levels above 350 mW – nearly threefold improvement over previous non-cascade state-of-the-art diodes. Utilization of the different quantum wells in cascade laser heterostructure was demonstrated to yield wide gain lasers as often desired for tunable laser spectroscopy. Two step etching was applied in effort of simultaneous minimization of both internal optical loss and the lateral current spreading in narrow ridge lasers.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
L. Shterengas, T. Hosoda, M. Wang, T. Feng, G. Kipshidze, G. Belenky, "Type-I QW cascade diode lasers for spectral region above 3 μm", Proc. SPIE 9767, Novel In-Plane Semiconductor Lasers XV, 976703 (7 March 2016); doi: 10.1117/12.2208933; https://doi.org/10.1117/12.2208933
PROCEEDINGS
8 PAGES


SHARE
RELATED CONTENT

Type I QW cascade diode lasers with 830 mW of...
Proceedings of SPIE (March 10 2015)
Electrical diagnositics of quantum cascade lasers
Proceedings of SPIE (March 10 2015)
Cascade pumping of GaSb based type I quantum well diode...
Proceedings of SPIE (February 27 2014)
High power 1.9 3.3 um type I quantum well cascade...
Proceedings of SPIE (February 20 2017)
Mid IR type II W and interband cascade lasers emitting...
Proceedings of SPIE (February 22 2006)

Back to Top