Low-threshold, mirrorless emission at 981 nm in an Yb,Gd,Lu:KYW inverted rib waveguide laser

Amol Choudhary; Western Bolaños; Pradeesh Kannan; Joan J. Carvajal; Magdalena Aguilò; Francesc Diaz; David P. Shepherd

doi:10.1117/12.2001832

6 March 2013 Low-threshold, mirrorless emission at 981 nm in an Yb,Gd,Lu:KYW inverted rib waveguide laser

Amol Choudhary, Western Bolaños, Pradeesh Kannan, Joan J. Carvajal, Magdalena Aguilò, Francesc Diaz, David P. Shepherd

Proceedings Volume 8599, Solid State Lasers XXII: Technology and Devices; 859905 (2013) https://doi.org/10.1117/12.2001832
Event: SPIE LASE, 2013, San Francisco, California, United States

Abstract

In this work, we demonstrate 3-level laser operation in a Yb,Gd,Lu:KYW waveguide laser fabricated by combination of liquid phase epitaxy and Ar⁺ ion beam milling. Laser emission was observed at 981 nm with an absorbed threshold power of 23 mW and a slope efficiency of 58% without the use of any mirrors. With an HR/6%T cavity, the threshold was reduced to 13 mW. The output was single mode with beam radii of 4.8 μm and 3 μm in the in-plane and out-of-plane direction respectively. Laser emission was also observed at 999.8 nm with a threshold of 8 mW by using mirrors favouring the 999.8 nm transition and forming an HR/5%T cavity.

Citation Download Citation

Amol Choudhary, Western Bolaños, Pradeesh Kannan, Joan J. Carvajal, Magdalena Aguilò, Francesc Diaz, and David P. Shepherd "Low-threshold, mirrorless emission at 981 nm in an Yb,Gd,Lu:KYW inverted rib waveguide laser", Proc. SPIE 8599, Solid State Lasers XXII: Technology and Devices, 859905 (6 March 2013); https://doi.org/10.1117/12.2001832

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