Title :
Effect of Fe doping on optical nonlinearity of KTiOAsO/sub 4/ crystals in femtosecond regime
Author :
Li, H.P. ; Lam, Y.L. ; Kam, C.H. ; Zhou, F.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Inst., Singapore
fDate :
Aug. 30 1999-Sept. 3 1999
Abstract :
Potassium titanyl arsenate KTiOAsO/sub 4/ (KTA) is a new nonlinear optical material, like its well-known analogue KTiOPO/sub 4/ (KTP), but with a larger nonlinear coefficient, higher figure of merit and lower ionic conductivity. It has been reported that Fe, Sc, and In doping of KTA can play an important role in developing its favorable properties for optical purposes. Here we present an investigation of refractive nonlinearity in Fe-doped and undoped KTA crystals by using a Z-scan technique with linearly polarized 120-fs (FWHM), 770-nm laser pulses. To the best of our knowledge, this is the first observation of the third-order nonlinearity in KTA with femtosecond pulses. The effect of Fe-doping on Kerr nonlinearity in KTA is also discussed.
Keywords :
high-speed optical techniques; iron; optical Kerr effect; photorefractive materials; potassium compounds; 120 fs; 770 nm; Fe doping; KTiOAsO/sub 4/ crystals; KTiOAsO/sub 4/:Fe; Kerr nonlinearity; Z-scan technique; femtosecond regime; figure of merit; ionic conductivity; linearly polarized laser pulses; nonlinear coefficient; optical nonlinearity; potassium titanyl arsenate; refractive nonlinearity; third-order nonlinearity; undoped KTA crystals; Conductivity; Crystals; Doping; Iron; Nonlinear optics; Optical materials; Optical polarization; Optical pulses; Optical refraction; Ultrafast optics;
Conference_Titel :
Lasers and Electro-Optics, 1999. CLEO/Pacific Rim '99. The Pacific Rim Conference on
Conference_Location :
Seoul, South Korea
Print_ISBN :
0-7803-5661-6
DOI :
10.1109/CLEOPR.1999.817789
