Spectral property of ultrashort chirped pulsed Gaussian beams diffracted by Gaussian aperture in dispersive media

Qihui Zou; Qianhuan Hu; Jie Guo; Xi Duan; Shihong Tong

doi:10.1117/12.2205438

21 October 2015 Spectral property of ultrashort chirped pulsed Gaussian beams diffracted by Gaussian aperture in dispersive media

Qihui Zou, Qianhuan Hu, Jie Guo, Xi Duan, Shihong Tong

Author Affiliations +

Proceedings Volume 9671, AOPC 2015: Advances in Laser Technology and Applications; 96712C (2015) https://doi.org/10.1117/12.2205438
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China

Abstract

Based on the Fresnel-Kirchhoff diffraction integral and Fourier transform, the propagation equation and its Fourier spectrum for ultra-short chirped pulsed Gaussian beams diffracted by Gaussian aperture are derived in dispersive medium, and the frequency-domain analytical electric field are presented. The effects of relative aperture, transmission distance and chirp parameter on the axial spectral properties are illustrated with numerical calculation results, and the variations of off-axis power spectrum with relative aperture, transmission distance and off-axis radius are given. It is found that the axial power spectrum of ultra-short chirped pulsed Gaussian increases with increasing relative aperture, the axial spectral blue-shift increases and approaches an asymptotic value associated with chirp parameter and propagation distance. The axial spectra of ultra-short chirped pulsed Gaussian become broadened with increasing the absolute value of the chirp parameter. With increasing off-axis radius, the off-axis power spectrum reduce rapidly, and the distribution of spectra shifts to the left. The off-axis spectral redshift increases with increasing off-axis radius.

Citation Download Citation

Qihui Zou, Qianhuan Hu, Jie Guo, Xi Duan, and Shihong Tong "Spectral property of ultrashort chirped pulsed Gaussian beams diffracted by Gaussian aperture in dispersive media", Proc. SPIE 9671, AOPC 2015: Advances in Laser Technology and Applications, 96712C (21 October 2015); https://doi.org/10.1117/12.2205438

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