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Proceedings Paper

Mode control for high performance laser diode sources
Author(s): Paul Leisher; Kirk Price; Shabbir Bashar; Ling Bao; Hua Huang; Jun Wang; Damian Wise; Shiguo Zhang; Suhit Das; Mark DeFranza; Aaron Hodges; Utsu Trifan; David Balsley; Weimin Dong; Mike Grimshaw; Mark DeVito; Jake Bell; Robert Martinsen; Jason Farmer; Paul Crump; Steve Patterson
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Paper Abstract

We report on recent progress in the control of optical modes toward the improvement of commercial high-performance diode laser modules. Control of the transverse mode has allowed scaling of the optical mode volume, increasing the peak output power of diode laser emitters by a factor of two. Commercially-available single emitter diodes operating at 885 nm now exhibit >25 W peak (12 W rated) at >60% conversion efficiency. In microchannel-cooled bar format, these lasers operate >120 W at 62% conversion efficiency. Designs of similar performance operating at 976 nm have shown >37,000 equivalent device hours with no failures. Advances in the control of lateral modes have enabled unprecedented brightness scaling in a fiber-coupled package format. Leveraging scalable arrays of single emitters, the conductively-cooled nLIGHT PearlTM package now delivers >80 W peak (50 W rated) at >53% conversion efficiency measured from a 200-μm core fiber output and >45 W peak (35 W rated) at >52% conversion efficiency measured from a 100-μm fiber output. nLIGHT has also expanded its product portfolio to include wavelength locking by means of external volume Bragg gratings. By controlling the longitudinal modes of the laser, this technique is demonstrated to produce a narrow, temperature-stabilized spectrum, with minimal performance degradation relative to similar free-running lasers.

Paper Details

Date Published: 3 April 2008
PDF: 11 pages
Proc. SPIE 6952, Laser Source Technology for Defense and Security IV, 69520C (3 April 2008); doi: 10.1117/12.778392
Show Author Affiliations
Paul Leisher, nLight Corp. (United States)
Kirk Price, nLight Corp. (United States)
Shabbir Bashar, nLight Corp. (United States)
Ling Bao, nLight Corp. (United States)
Hua Huang, nLight Corp. (United States)
Jun Wang, nLight Corp. (United States)
Damian Wise, nLight Corp. (United States)
Shiguo Zhang, nLight Corp. (United States)
Suhit Das, nLight Corp. (United States)
Mark DeFranza, nLight Corp. (United States)
Aaron Hodges, nLight Corp. (United States)
Utsu Trifan, nLight Corp. (United States)
David Balsley, nLight Corp. (United States)
Weimin Dong, nLight Corp. (United States)
Mike Grimshaw, nLight Corp. (United States)
Mark DeVito, nLight Corp. (United States)
Jake Bell, nLight Corp. (United States)
Robert Martinsen, nLight Corp. (United States)
Jason Farmer, nLight Corp. (United States)
Paul Crump, nLight Corp. (United States)
Steve Patterson, nLight Corp. (United States)

Published in SPIE Proceedings Vol. 6952:
Laser Source Technology for Defense and Security IV
Mark Dubinskii; Gary L. Wood, Editor(s)

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