Femtosecond laser inscribed waveguide and micro-chip laser operation at 1.07μm in Yb3+ doped germanate glass

Mamoona Khalid; George Y. Chen; Jiafang Bei; Heike Ebendorff-Heideprem; David G. Lancaster

doi:10.1117/12.2539820

30 December 2019 Femtosecond laser inscribed waveguide and micro-chip laser operation at 1.07μm in Yb³⁺ doped germanate glass

Mamoona Khalid, George Y. Chen, Jiafang Bei, Heike Ebendorff-Heideprem, David G. Lancaster

Author Affiliations +

Proceedings Volume 11200, AOS Australian Conference on Optical Fibre Technology (ACOFT) and Australian Conference on Optics, Lasers, and Spectroscopy (ACOLS) 2019; 1120028 (2019) https://doi.org/10.1117/12.2539820
Event: ANZCOP, 2019, Melbourne, Australia

Abstract

The development of the first Yb³⁺ doped microchip and waveguide laser in germanate glass (GPGN) is reported with a composition of 54GeO₂-31PbO-4Ga₂O₃-9Na₂CO₃-1.5Yb₂O₃ (Yb³⁺: GPGN). Up to 51mW at 650mW of input power is obtained from a L=4.5mm long cavity microchip laser operating at 1052nm with slope efficiency of ~30% and laser threshold of ~230mW. Single track (type 1) waveguides are inscribed 150μm beneath the surface of the sample in the femtosecond laser cumulative heating regime. Pulse energies range from15nJ to 75nJ producing guiding structures ranging from d= 12μm to 60μm. Waveguide laser operation is achieved for a 24μm diameter waveguide with up to ~20mW output power generated at 1.07μm for 650mW of 976 nm pump power.

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Mamoona Khalid, George Y. Chen, Jiafang Bei, Heike Ebendorff-Heideprem, and David G. Lancaster "Femtosecond laser inscribed waveguide and micro-chip laser operation at 1.07μm in Yb³⁺ doped germanate glass", Proc. SPIE 11200, AOS Australian Conference on Optical Fibre Technology (ACOFT) and Australian Conference on Optics, Lasers, and Spectroscopy (ACOLS) 2019, 1120028 (30 December 2019); https://doi.org/10.1117/12.2539820

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