New submount requirement of conductively cooled laser diodes for lidar applications

Steve Y. Mo; Andrew D. Cutler; Sang H. Choi; Minhee Lee; Upendra N. Singh

doi:10.1117/12.417034

13 February 2001 New submount requirement of conductively cooled laser diodes for lidar applications

Steve Y. Mo, Andrew D. Cutler, Sang H. Choi, Minhee Lee, Upendra N. Singh

Proceedings Volume 4153, Lidar Remote Sensing for Industry and Environment Monitoring; (2001) https://doi.org/10.1117/12.417034
Event: Second International Asia-Pacific Symposium on Remote Sensing of the Atmosphere, Environment, and Space, 2000, Sendai, Japan

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.

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Steve Y. Mo, Andrew D. Cutler, Sang H. Choi, Minhee Lee, and Upendra N. Singh "New submount requirement of conductively cooled laser diodes for lidar applications", Proc. SPIE 4153, Lidar Remote Sensing for Industry and Environment Monitoring, (13 February 2001); https://doi.org/10.1117/12.417034

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KEYWORDS

Semiconductor lasers

Diodes

Laser imaging

LIDAR

Temperature metrology

High power diode lasers

High power lasers

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