Abstract
GaSb-based and InAs-based semiconductor gain media with band-edge wavelengths between 3.3 to 4 μm were used in grating-tuned external cavity configuration. Output wavelength was tuned up to approximately 9.5% of the center wavelength; and power from few tens of mW to 0.2-W peak, 20- mW average was achieved at 80 K operation. The tuning range is approximately 2 - 3 times wider than those of near-IR semiconductor lasers, as expected for mid-IR semiconductors which have smaller electron masses. The external cavity laser had a multimode linewidth of 1 - 2 nm, which was approximately 10 to 20 times narrower than that of a free running laser. Analysis of the gain/loss spectral properties indicates that the tuning range is still severely limited by facet anti-reflection coating and non-optimal wafer structure. Model calculation indicates a tuning range a few times larger is possible with more optimal wafer design.
Original language | English (US) |
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Title of host publication | Proceedings of SPIE - The International Society for Optical Engineering |
Editors | Hong K. Choi, Peter S. Zory |
Place of Publication | Bellingham, WA, United States |
Publisher | Society of Photo-Optical Instrumentation Engineers |
Pages | 298-308 |
Number of pages | 11 |
Volume | 3001 |
ISBN (Print) | 0819424129 |
State | Published - 1997 |
Event | In-Plane Semiconductor Lasers: from Ultraviolet to Midinfrared - San Jose, CA, USA Duration: Feb 10 1997 → Feb 13 1997 |
Other
Other | In-Plane Semiconductor Lasers: from Ultraviolet to Midinfrared |
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City | San Jose, CA, USA |
Period | 2/10/97 → 2/13/97 |
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Condensed Matter Physics
- Applied Mathematics
- Computer Science Applications
- Electronic, Optical and Magnetic Materials