26 February 2013 Higher brightness laser diodes with smaller slow axis divergence
Author Affiliations +
Abstract
The slow axis (SA) divergence of 20% fill-factor, 980nm, laser diodes (LDs) have been investigated under short pulsed (SP) and continuous (CW) operation. By analyzing the data collected under these two modes of operation, one finds that the SA divergence can be separated into two components: an intrinsic divergence and a thermally induced divergence. At low injected current and power, the intrinsic SA divergence is dominant while at high power their magnitudes are approximately equal. The thermal gradient across the broad stripe is negligible under SP operation and, the SA divergence increased at a much slower rate as a function of injected current, thereby increasing the brightness of the LD by 2X. SRL has redesigned microchannel coolers that remove the thermal gradient under CW operation thereby eliminating the thermally induced SA divergence resulting in LDs that are 2X brighter at 300W/bar.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Wenyang Sun, Wenyang Sun, Rajiv Pathak, Rajiv Pathak, Geoff Campbell, Geoff Campbell, Henry Eppich, Henry Eppich, J. H. Jacob, J. H. Jacob, Aland Chin, Aland Chin, Jack Fryer, Jack Fryer, "Higher brightness laser diodes with smaller slow axis divergence", Proc. SPIE 8605, High-Power Diode Laser Technology and Applications XI, 86050D (26 February 2013); doi: 10.1117/12.2004308; https://doi.org/10.1117/12.2004308
PROCEEDINGS
9 PAGES


SHARE
RELATED CONTENT

Thermal properties of InGaN laser diodes and arrays
Proceedings of SPIE (March 03 2013)
760nm a new laser diode wavelength for hair removal...
Proceedings of SPIE (February 19 2015)
Advances in high-power semiconductor diode lasers
Proceedings of SPIE (January 04 2008)
Twin Beam Laser Diode for Optical Disk Memory
Proceedings of SPIE (April 19 1987)
Microchip laser operating at 1338 nm
Proceedings of SPIE (February 27 2006)

Back to Top