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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 38, Iss. 17 — Sep. 1, 2013
  • pp: 3294–3297

Femtosecond-laser inscribed double-cladding waveguides in Nd:YAG crystal: a promising prototype for integrated lasers

Hongliang Liu, Feng Chen, Javier R. Vázquez de Aldana, and D. Jaque  »View Author Affiliations

Optics Letters, Vol. 38, Issue 17, pp. 3294-3297 (2013)

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We report on the design and implementation of a prototype of optical waveguides fabricated in Nd:YAG crystals by using femtosecond-laser irradiation. In this prototype, two concentric tubular structures with nearly circular cross sections of different diameters have been inscribed in the Nd:YAG crystals, generating double-cladding waveguides. Under 808 nm optical pumping, waveguide lasers have been realized in the double-cladding structures. Compared with single-cladding waveguides, the concentric tubular structures, benefiting from the large pump area of the outermost cladding, possess both superior laser performance and nearly single-mode beam profile in the inner cladding. Double-cladding waveguides of the same size were fabricated and coated by a thin optical film, and a maximum output power of 384 mW and a slope efficiency of 46.1% were obtained. Since the large diameters of the outer claddings are comparable with those of the optical fibers, this prototype paves a way to construct an integrated single-mode laser system with a direct fiber-waveguide configuration.

© 2013 Optical Society of America

OCIS Codes
(140.3390) Lasers and laser optics : Laser materials processing
(160.3380) Materials : Laser materials
(230.7370) Optical devices : Waveguides

ToC Category:
Lasers and Laser Optics

Original Manuscript: July 16, 2013
Revised Manuscript: July 30, 2013
Manuscript Accepted: July 30, 2013
Published: August 22, 2013

Hongliang Liu, Feng Chen, Javier R. Vázquez de Aldana, and D. Jaque, "Femtosecond-laser inscribed double-cladding waveguides in Nd:YAG crystal: a promising prototype for integrated lasers," Opt. Lett. 38, 3294-3297 (2013)

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