Referenced in: none

Automatically associated channels: Slo1

Title: Highly efficient Yb3+-doped channel waveguide laser at 981 nm.

Authors: D Geskus, E H Bernhardi, K van Dalfsen, S Aravazhi, M Pollnau

Journal, date & volume: Opt Express, 2013 Jun 3 , 21, 13773-8

PubMed link: http://www.ncbi.nlm.nih.gov/pubmed/23736630

Abstract
Channel waveguide lasers operating at 981 nm are demonstrated in KY(1-x-y)Gd(x)Lu(y)(WO4)2:Yb3+ waveguides grown by liquid phase epitaxy onto undoped KY(WO4)2 substrates and microstructured by Ar+ beam etching. Under pumping at 934 nm of samples with different waveguide geometry and outcoupling degree, a record-high slope efficiency of 76% versus absorbed pump power and a record-high output power of 650 mW for rare-earth-ion-doped microstructured channel waveguide lasers is achieved. The laser performance is compared to that of the same devices when pumping at 981 nm and lasing near 1025 nm.