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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 38, Iss. 16 — Aug. 15, 2013
  • pp: 3154–3157

High-power dense wavelength division multiplexing of multimode diode laser radiation based on volume Bragg gratings

Stefan Hengesbach, Niels Krauch, Carlo Holly, Martin Traub, Ulrich Witte, and Dieter Hoffmann  »View Author Affiliations


Optics Letters, Vol. 38, Issue 16, pp. 3154-3157 (2013)
http://dx.doi.org/10.1364/OL.38.003154


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Abstract

We present a dense wavelength division multiplexer based on volume Bragg gratings (VBGs) with a channel spacing of Δλ=1.5nm. Multiplexing efficiencies of ηSM=97% have been demonstrated with single-mode, frequency-stabilized diode laser radiation. By use of VBGs in an external-cavity laser we constrict the spectral bandwidth of passively cooled multimode diode laser bars with 19 broad-area emitters to δλ95%=120pm. When the multimode high-power diode laser radiation with a beam propagation factor of M245 is overlaid, the multiplexing efficiency decreases to ηMM=85%. Temperature control of the VBGs expands the high-efficiency operation range.

© 2013 Optical Society of America

OCIS Codes
(060.4230) Fiber optics and optical communications : Multiplexing
(090.1970) Holography : Diffractive optics
(090.7330) Holography : Volume gratings
(140.3460) Lasers and laser optics : Lasers
(140.5960) Lasers and laser optics : Semiconductor lasers
(140.3298) Lasers and laser optics : Laser beam combining

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: June 27, 2013
Manuscript Accepted: July 19, 2013
Published: August 14, 2013

Citation
Stefan Hengesbach, Niels Krauch, Carlo Holly, Martin Traub, Ulrich Witte, and Dieter Hoffmann, "High-power dense wavelength division multiplexing of multimode diode laser radiation based on volume Bragg gratings," Opt. Lett. 38, 3154-3157 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-16-3154

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