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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 30, Iss. 18 — Sep. 15, 2005
  • pp: 2424–2426

Effective bandwidth reduction for a high-power laser-diode array by an external-cavity technique

Yujin Zheng and Hirofumi Kan  »View Author Affiliations


Optics Letters, Vol. 30, Issue 18, pp. 2424-2426 (2005)
http://dx.doi.org/10.1364/OL.30.002424


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Abstract

The spectral bandwidth of a high-power laser-diode array was effectively suppressed by use of an off-axis external-cavity technique. The external cavity consisted of a beam-transformation system and a pair of off-axis volume Bragg gratings. During operation at a drive current of 40 A, we reduced the bandwidth's full width at half-maximum from 3.3 to 0.24 nm (14-fold reduction) and achieved an output power of 20 W, or as much as 87% of the power radiated by a free-running laser-diode array without an external cavity.

© 2005 Optical Society of America

OCIS Codes
(140.2010) Lasers and laser optics : Diode laser arrays
(140.3290) Lasers and laser optics : Laser arrays
(140.3410) Lasers and laser optics : Laser resonators

Citation
Yujin Zheng and Hirofumi Kan, "Effective bandwidth reduction for a high-power laser-diode array by an external-cavity technique," Opt. Lett. 30, 2424-2426 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-18-2424

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