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Optical Engineering

Study on the weak absorption of potassium titanyl phosphate crystals
Author(s): Xiaomao Li; Zhanggui Hu; Tianye Lu; Changlong Zhang
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Paper Abstract

Potassium titanyl phosphate (KTP) is mostly used in all-solid-state lasers as a good nonlinear optical crystal. Knowledge of variations in the weak absorption of different types of KTP crystals is important for the application. In this study, the flux-grown KTP crystals with titanium from TiO2, TiCl4, and Ti(OC4H9)4, respectively, and the hydrothermal-grown KTP crystal were investigated. The weak absorption values of the KTP crystals were measured at 1064 nm and 532 nm by photothermal common-path interferometer. The weak absorption values of four samples were 100  ppm·cm−1, 800  ppm·cm−1, 45  ppm·cm−1, 1064  ppm·cm−1 at 1064 nm, and 2.6×104  ppm·cm−1, 1.6×105  ppm·cm−1, 1.2×104  ppm·cm−1, 2.25×102  ppm·cm−1 at 532 nm, respectively. The results showed that the weak absorption values of the flux-grown KTP with titanium from Ti(OC4H9)4 and the hydrothermal-grown KTP were low values at 1064 nm. In addition, the weak absorption value of the hydrothermal-grown KTP was at least two orders of magnitude lower than that of the flux-grown KTP at 532 nm. From the results, we concluded that the KTP grown by titanium from Ti(OC4H9)4 represented a better quality than the other two flux-grown KTP crystals. The quality of the hydrothermal-grown KTP was obviously better than the flux-grown KTP.

Paper Details

Date Published: 16 March 2012
PDF: 7 pages
Opt. Eng. 51(3) 039001 doi: 10.1117/1.OE.51.3.039001
Published in: Optical Engineering Volume 51, Issue 3
Show Author Affiliations
Xiaomao Li, Technical Institute of Physics and Chemistry (China)
Zhanggui Hu, Technical Institute of Physics and Chemistry (China)
Tianye Lu, Technical Institute of Physics and Chemistry (China)
Changlong Zhang, Guilin Research Institute of Geology for Mineral Resources (China)

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