Title :
Control of gray-tracking formation in KTiOPO/sub 4/ crystals by thermal annealing preprocess
Author :
Motokoshi, S. ; Jitsuno, T. ; Nakatsuka, M. ; Izawa, Y.
Author_Institution :
Inst. for Laser Technol., Osaka, Japan
Abstract :
Summary form only given. The KTiOPO/sub 4/ (KTP) crystal was used for second-harmonic generation (SHG) of high-average-power lasers because it has a large nonlinear optical coefficient and a wide temperature bandwidth. However, the crystal has one disadvantage, i.e., gray-tracking formation. The gray-tracking was investigated by many workers. The gray-tracking susceptibility (GTS) was different for individual crystal. To understand the gray-tracking formation, many crystals from different growth techniques should be compared. Relationship between the absorption coefficient and the GTS or the impurities for different KTP crystals was investigated. Finally, we propose a new approach to improve the gray-tracking.
Keywords :
absorption coefficients; annealing; nonlinear optical susceptibility; optical harmonic generation; optical materials; potassium compounds; titanium compounds; 1064 nm; KTiOPO/sub 4/; SHG; absorption coefficient; gray-tracking; gray-tracking control; gray-tracking formation; gray-tracking susceptibility; growth techniques; high-average-power lasers; impurities; nonlinear optical coefficient; second-harmonic generation; temperature bandwidth; thermal annealing preprocess; Annealing; Crystals; Heat transfer; Laser excitation; Laser modes; Laser theory; Optical polymers; Pump lasers; Semiconductor lasers; Temperature dependence;
Conference_Titel :
Lasers and Electro-Optics, 2000. (CLEO 2000). Conference on
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
1-55752-634-6
DOI :
10.1109/CLEO.2000.906791
