Abstract

Based on the refractive laser beam shaping system, the dark hollow femtosecond pulse beam shaping technique with a phase-only liquid crystal spatial light modulator (LC-SLM) is demonstrated. The phase distribution of the LC-SLM is derived by the energy conservation and constant optical path principle. The effects of the shaping system on the temporal properties, including spectral phase distribution and bandwidth of the femtosecond pulse, are analyzed in detail. Experimental results show that the hollow intensity distribution of the output pulsed beam can be maintained much at more than $1200\mathrm{mm}$. The spectral phase of the pulse is changed, and the pulse width is expanded from 199 to $230\mathrm{fs}$, which is caused by the spatial–temporal coupling effect. The coupling effect mainly depends on the phase-only LC-SLM itself, not on its loaded phase distribution. The experimental results indicate that the proposed shaping setup can generate a dark hollow femtosecond pulsed beam effectively, because the temporal Gaussian waveform is unchanged.

© 2011 Optical Society of America

Near-diffraction-limited annular flattop beam shaping with dual phase only liquid crystal spatial light modulators

Haotong Ma, Pu Zhou, Xiaolin Wang, Yanxing Ma, Fengjie Xi, Xiaojun Xu, and Zejin Liu
Opt. Express 18(8) 8251-8260 (2010)

Adaptive conversion of multimode beam to near-diffraction-limited flattop beam based on dual-phase-only liquid-crystal spatial light modulators

Haotong Ma, Haichuan Zhao, Pu Zhou, Xiaolin Wang, Yanxing Ma, Xiaojun Xu, and Zejin Liu
Opt. Express 18(26) 27723-27730 (2010)

Correction of Fabry-Pérot interference effects in phase and amplitude pulse shapers based on liquid crystal spatial light modulators

Lukas Wittenbecher and Donatas Zigmantas
Opt. Express 27(16) 22970-22982 (2019)

Optimization of beam shaping for ultrasensitive inertial measurement using a phase-only spatial light modulator

Xu Chen, Xiujie Fang, Danyue Ma, Ying Liu, Li Cao, and Yueyang Zhai
Appl. Opt. 61(6) C55-C64 (2022)

Arbitrary shaping of on-axis amplitude of femtosecond Bessel beams with a single phase-only spatial light modulator

Ismail Ouadghiri-Idrissi, Remo Giust, Luc Froehly, Maxime Jacquot, Luca Furfaro, John M. Dudley, and Francois Courvoisier
Opt. Express 24(11) 11495-11504 (2016)