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Proceedings Paper

New submount requirement of conductively cooled laser diodes for lidar applications
Author(s): Steve Y. Mo; Andrew D. Cutler; Sang H. Choi; Minhee Lee; Upendra N. Singh
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Paper Abstract

New submount technology is essential for the development of conductively cooled high power diode laser. The simulation and experimental results indicate that thermal conductivity of submount for high power laser-diode must be at least 600 W/mlk or higher for stable operation. We have simulated several theoretical thermal model based on new submount designs and characterized high power diode lasers to determine temperature effects on the performances of laser diodes. The characterization system measures the beam power, output beam profile, temperature distribution, and spectroscopic property ofhigh power diode laser. The characterization system is composed of four main parts: an infrared imaging camera, a CCD camera, a monochromator, and a power meter. Thermal characteristics of two commercial-grade CW 20-W diode laser bars with open heat-sink type were determined with respect to the line shift of emission spectra and beam power stability. The center wavelength of laser emission has a tendency to shift toward longer wavelength as the driving current and heat sink temperature are increased. The increase of heat sink temperature decreases the output power of the laser bar too. Such results lay the guidelines for the design of new submount for high power laser-diodes.

Paper Details

Date Published: 13 February 2001
PDF: 10 pages
Proc. SPIE 4153, Lidar Remote Sensing for Industry and Environment Monitoring, (13 February 2001); doi: 10.1117/12.417034
Show Author Affiliations
Steve Y. Mo, NASA Langley Research Ctr. (United States)
Andrew D. Cutler, George Washington Univ. (United States)
Sang H. Choi, NASA Langley Research Ctr. (United States)
Minhee Lee, Inha Univ. (South Korea)
Upendra N. Singh, NASA Langley Research Ctr. (United States)


Published in SPIE Proceedings Vol. 4153:
Lidar Remote Sensing for Industry and Environment Monitoring
Upendra N. Singh; Upendra N. Singh; Kazuhiro Asai; Toshikasu Itabe; Toshihiro Ogawa; Nobuo Sugimoto, Editor(s)

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