Research Project: 1.3 µM Civarında Çalışan Özgün Dalga Klavuzu Lazerlerinin Geliştirilmesi
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Contributors
Funders
ID
TB.00394
Authors
Sennaroğlu, Alphan
Faculty Member
Publications
Femtosecond laser written continuous-wave Nd3+:BaY2F8 waveguide laser at 1.3 mu m
(Elsevier, 2022) Jahangiri, Hadi; Morova, Berna; Morova, Yağız; Sennaroğlu, Alphan; Baylam, Işınsu; Di Lieto, Alberto; Cittadino, Giovanni; Damiano, Eugenio; Tonelli, Mauro; Department of Physics; KUYTAM (Koç University Surface Science and Technology Center); Laser Research Laboratory; Yes; College of Sciences; Research Center; Laboratory
We experimentally demonstrate, for the first time to our knowledge, robust operation of a Nd3(+:)BaY(2)F(8) waveguide laser at 1.3 mu m without any parasitic lasing at any other wavelength. The best power performance was obtained with a depressed cladding waveguide, having a diameter of 70 mu m, which was fabricated by employing femtosecond laser writing. The propagation loss of the waveguide was measured as 0.33 dB/cm at the wavelength of 761 nm. The power performance of the waveguide laser was investigated for E//z and E//y pumping polarizations by using butt-coupled flat resonator mirrors. Higher power performance was obtained for E//z pumping, where the resonator with the 6.2% transmitting output coupler produced 157 mW of continuous-wave output power at 1318 nm with 882 mW of pump power at 800 nm. The measured power slope efficiency was 19% with respect to the incident pump power. By using a different set of cavity optics, 1050-nm lasing performance was also studied, where E//z pumping at 800 nm with the 12% transmitting output coupler yielded 307 mW of output power with 31% slope efficiency. Use of a host medium with relatively low refractive index around 1.5 was instrumental in reducing the facet reflectivity and eliminating the possibility of parasitic lasing at 1.05 mu m during 1.3-mu m lasing.
