Abstract

The potassium double tungstates KY(WO4)2, KGd(WO4)2, and KLu(WO4)2 are recognized as excellent host materials for rare-earth-ion-doped lasers, see Ref. [1] and Refs. therein. Especially KY(WO4)2:Yb3+, hereafter abbreviated as KYW:Yb3+, exhibits large absorption and emission cross-sections, a small quantum defect [2], and laser emission with high slope efficiencies. Liquid phase epitaxy (LPE) has been used to grow thin layers of KYW:Yb3+ onto pure K Y W substrates and planar waveguide lasing with slope efficiencies up to 80% has been demonstrated in samples doped with 1.2-2.4% Yb3+ [3]. Recently, similar results have been obtained under diode pumping with a monolithic cavity [4]. The main disadvantage of this approach for fabricating integrated devices is the fact that the choice of rather low Yb3 + concentration is governed by the need to optimize the laser properties, resulting in a low refractive-index contrast between layer and substrate of only a few ×10−4. This inhibits downscaling the waveguide thickness to 1-2 μm.

© 2009 IEEE

PDF Article
More Like This
High-power, broadly tunable, and low-quantum-defect Yb3+-doped double tungstate channel waveguide lasers

D. Geskus, S. Aravazhi, K. Wörhoff, and M. Pollnau
ATuD6 Advanced Solid-State Photonics (ASSP) 2011

Growth and characterization of highly Yb3+-doped KY(WO4)2 thin layers

S. Aravazhi, D. Geskus, K. van Dalfsen, D. Günther, and M. Pollnau
CE3_2 The European Conference on Lasers and Electro-Optics (CLEO_Europe) 2011

Low-threshold and highly efficient Gd3+, Lu3+ co-doped KY(WO4)2: Yb3+ planar waveguide lasers

D. Geskus, S. Aravazhi, E. Bernhardi, C. Grivas, K. Wörhoff, and M. Pollnau
ATuB2 Advanced Solid-State Photonics (ASSP) 2010

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription