Femtosecond laser-induced thermal lens effect in chromium film

Abstract

The thermal lens (TL) effect induced by femtosecond laser pulses in chromium film is reported. A Fresnel diffraction theory is used to explain the TL effect. The intensity profile of the TL calculated by the theoretical model is in agreement with the experimental results. The contrast ratio of the TL is defined to describe the TL effect, and we find that the maximum contrast ratio of the TL effect is obtained when the probe beam is recorded at a characteristic distance. The dependence of the contrast ratio of the TL on different pump laser power levels and delay times is also investigated. Numerical simulations are also consistent with the experimental results.

© 2010 Optical Society of America

Femtosecond off-axis digital holography for monitoring dynamic surface deformation

Linwei Zhu, Changhe Zhou, Tengfei Wu, Wei Jia, Zhongwei Fan, Yunfeng Ma, and Gang Niu
Appl. Opt. 49(13) 2510-2518 (2010)

Pulsed mode thermal lens effect detection in the near field via thermally induced probe beam spatial phase modulation: a theory

J. F. Power
Appl. Opt. 29(1) 52-63 (1990)

Probe-beam diffraction in a pulsed top-hat beam thermal lens with a mode-mismatched configuration

Bincheng Li and Eberhard Welsch
Appl. Opt. 38(24) 5241-5249 (1999)

Time-resolved thermal lens spectroscopy with a single-pulsed laser excitation beam: an analytical model for dual-beam mode-mismatched experiments

Mohammad Sabaeian, Hamidreza Rezaei, and Abdolmohammad Ghalambor-Dezfouli
Appl. Opt. 56(4) 999-1005 (2017)

Laser-induced thermal lens effect: a new theoretical model

S. J. Sheldon, L. V. Knight, and J. M. Thorne
Appl. Opt. 21(9) 1663-1669 (1982)