High power cascade diode lasers emitting near 2 μm
Abstract
High-power two-stage cascade GaSb-based type-I quantum well diode lasers emitting near 2 μm were designed and fabricated. Coated devices with cavity length of 3 mm generated about 2 W of continuous wave power from 100-μm-wide aperture at the current of 6 A. The power conversion efficiency peaked at 20%. Carrier recycling between quantum well gain stages was realized using band-to-band tunneling in GaSb/AlSb/InAs heterostructure complemented with optimized electron and hole injector regions. Design optimization eliminated parasitic optical absorption and thermionic emission, and included modification of the InAs quantum wells of electron and composition and doping profile of hole injectors. Utilization of the cascade pumping scheme yielded 2 μm lasers with improved output power and efficiency compared to existing state-of-the-art diodes.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 28, 2016
- Source ID
- 10.1063/1.4944553
Entities
People
- G. Kipshidze
- Gregory Belenky
- L. Shterengas
- Takashi Hosoda
- Tao Feng
Organizations
- Army Research Office
- National Science Foundation
- Stony Brook University