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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 23 — Nov. 5, 2012
  • pp: 25554–25561

High efficiency, resonantly diode pumped, double-clad, Er:YAG-core, waveguide laser

N. Ter-Gabrielyan, V. Fromzel, X. Mu, H. Meissner, and M. Dubinskii  »View Author Affiliations

Optics Express, Vol. 20, Issue 23, pp. 25554-25561 (2012)

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We report on the highly efficient, resonantly diode-pumped Er:YAG-core, double-clad, all-crystalline eye-safe waveguide laser. A 500 × 500 μm Er3+(1%):YAG single-crystalline core with an ultra low numerical aperture (NA) of ~0.02 was surrounded by a 700 × 700 μm undoped single-crystalline YAG cladding. The entire Er:YAG/YAG core/clad structure was over-clad by transparent magnesium aluminum spinel (MgAl2O4) ceramic. The waveguide was continuously (CW) clad-pumped by a spectrally-narrowed, fiber-coupled InGaAsP/InP laser diode module at ~1532 nm. We achieved 25.4 W of output power at 1645 nm with a beam quality of M2 ~2.6. The achieved 56.6% slope efficiency with respect to the absorbed pump was derived by factoring out scattering loss of the pump light in the inner cladding. With a wavelength-selective cavity, the waveguide laser delivered ~8 W of output power at 1616.6 nm. To the best of our knowledge, it is the first reported laser experiment with a crystalline Er3+:YAG-core and a truly double-clad crystalline waveguide structure.

© 2012 OSA

OCIS Codes
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3500) Lasers and laser optics : Lasers, erbium
(140.3580) Lasers and laser optics : Lasers, solid-state

ToC Category:
Lasers and Laser Optics

Original Manuscript: September 20, 2012
Revised Manuscript: October 17, 2012
Manuscript Accepted: October 19, 2012
Published: October 25, 2012

N. Ter-Gabrielyan, V. Fromzel, X. Mu, H. Meissner, and M. Dubinskii, "High efficiency, resonantly diode pumped, double-clad, Er:YAG-core, waveguide laser," Opt. Express 20, 25554-25561 (2012)

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