Modified Z-scan method for determination of nonlinear refraction of optical materials through the measurement of power-weighted time-averaged beam propagation factor

Alexander S. Dement'ev; Andrius Jovaisa; Robertas Navakas

doi:10.1117/12.472481

30 May 2003 Modified Z-scan method for determination of nonlinear refraction of optical materials through the measurement of power-weighted time-averaged beam propagation factor

Alexander S. Dement'ev, Andrius Jovaisa, Robertas Navakas

Author Affiliations +

Proceedings Volume 4932, Laser-Induced Damage in Optical Materials: 2002 and 7th International Workshop on Laser Beam and Optics Characterization; (2003) https://doi.org/10.1117/12.472481
Event: XXXIV Annual Symposium on Optical Materials for High Power Lasers: Boulder Damage Symposium, 2002, Boulder, CO, United States

Abstract

We demonstrate the possibility of extension of the open aperture Z-scan technique to measurement of nonlinear refractive indices for self-phase modulation and two-color cross-phase modulation of optical materials by measurement of power-weighted time-averaged propagation factor [M²(t)] of the beam after the sample. The influence of the temporal shape of the pulse is investigated for two cases: when the pulse peak intensity at the beam waist is known, or when the total energy of the pulse and the duration of the correlation function are known only. Numerical calculations show that the determined values of refraction indices might vary noticeably if the proper pulse shape is not taken into account.

Citation Download Citation

Alexander S. Dement'ev, Andrius Jovaisa, and Robertas Navakas "Modified Z-scan method for determination of nonlinear refraction of optical materials through the measurement of power-weighted time-averaged beam propagation factor", Proc. SPIE 4932, Laser-Induced Damage in Optical Materials: 2002 and 7th International Workshop on Laser Beam and Optics Characterization, (30 May 2003); https://doi.org/10.1117/12.472481

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