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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 1 — Jan. 1, 2011
  • pp: 90–94

Tunable high-power narrow-spectrum external-cavity diode laser at 675 nm as a pump source for UV generation

Mingjun Chi, Ole Bjarlin Jensen, Götz Erbert, Bernd Sumpf, and Paul Michael Petersen  »View Author Affiliations


Applied Optics, Vol. 50, Issue 1, pp. 90-94 (2011)
http://dx.doi.org/10.1364/AO.50.000090


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Abstract

High-power narrow-spectrum diode laser systems based on tapered gain media in an external cavity are demonstrated at 675 nm . Two 2 mm long amplifiers are used, one with a 500 μm long ridge-waveguide section (device A), the other with a 750 μm long ridge-waveguide section (device B). Laser system A based on device A is tunable from 663 to 684 nm with output power higher than 0.55 W in the tuning range; as high as 1.25 W output power is obtained at 675.34 nm . The emission spectral bandwidth is less than 0.05 nm throughout the tuning range, and the beam quality factor M 2 is 2.07 at an output power of 1.0 W . Laser system B based on device B is tunable from 666 to 685 nm . As high as 1.05 W output power is obtained around 675.67 nm . The emission spectral bandwidth is less than 0.07 nm throughout the tuning range, and the beam quality factor M 2 is 1.13 at an output power of 0.93 W . Laser system B is used as a pump source for the generation of 337.6 nm UV light by single-pass frequency doubling in a bismuth triborate (BIBO) crystal. An output power of 109 μW UV light, corresponding to a conversion efficiency of 0.026 % W 1 , is attained.

© 2011 Optical Society of America

OCIS Codes
(140.2020) Lasers and laser optics : Diode lasers
(140.3280) Lasers and laser optics : Laser amplifiers
(140.5960) Lasers and laser optics : Semiconductor lasers
(190.2620) Nonlinear optics : Harmonic generation and mixing

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: October 20, 2010
Revised Manuscript: November 22, 2010
Manuscript Accepted: November 22, 2010
Published: December 27, 2010

Citation
Mingjun Chi, Ole Bjarlin Jensen, Götz Erbert, Bernd Sumpf, and Paul Michael Petersen, "Tunable high-power narrow-spectrum external-cavity diode laser at 675 nm as a pump source for UV generation," Appl. Opt. 50, 90-94 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-1-90

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