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Proceedings Paper

Fabrication of Nd:KGW waveguides by use of nozzle-gas-assisted PLD method
Author(s): Takeshi Okato; Minoru Obara; Petar A. Atanasov
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Paper Abstract

Nd:KGW [or Nd:KGd(WO4)2] films are grown using the nozzle-gas-assisted pulsed-laser deposition (NGA-PLD) method. A KrF excimer laser is used for the ablation of K-rich ceramic targets and films are deposited on r-cut sapphire substrates. The dependences of the oxygen nozzle gas on the film optical and crystallographic properties are investigated. The Nd:KGW film is colored if the mass flow is not sufficient. The origin of the color is attributed to the oxygen deficiency phase which is confirmed by the optical absorption and x-ray diffraction (XRD) measurements. Highly crystallized Nd:KGW films are grown by NGA-PLD under the optimized conditions. Comparing the films grown by conventional PLD (C-PLD) method, a dramatic improvement in the film surface morphology is chieved with NGA-PLD.

Paper Details

Date Published: 22 April 2005
PDF: 5 pages
Proc. SPIE 5830, 13th International School on Quantum Electronics: Laser Physics and Applications, (22 April 2005); doi: 10.1117/12.617356
Show Author Affiliations
Takeshi Okato, Keio Univ. (Japan)
Minoru Obara, Keio Univ. (Japan)
Petar A. Atanasov, Institute of Electronics (Bulgaria)

Published in SPIE Proceedings Vol. 5830:
13th International School on Quantum Electronics: Laser Physics and Applications
Peter A. Atanasov; Sanka V. Gateva; Lachezar A. Avramov; Alexander A. Serafetinides, Editor(s)

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