Spectral broadening in lithium niobate in a self-diffraction geometry using ultrashort pulses

被引：1

作者：

Dharmadhikari, Jayashree A. ^{[1
]}

Dota, Krithika ^{[1
]}

Mathur, Deepak ^{[1
,2
]}

Dharmadhikari, Aditya K. ^{[2
]}

机构：

[1] Manipal Univ, Ctr Atom & Mol Phys, Manipal 576104, India

[2] Tata Inst Fundamental Res, 1 Homi Bhabha Rd, Mumbai 400005, Maharashtra, India

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 2016年 / 122卷 / 05期

关键词：

STIMULATED RAMAN-SCATTERING; FEMTOSECOND LASER-PULSES; COHERENT-LIGHT GENERATION; OPTICAL PULSES; MOLECULAR MODULATION; PHASE MODULATIONS; PHONON-POLARITONS; FS; BAND; COMPRESSION;

D O I：

10.1007/s00340-016-6423-y

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report on broadband light generation in the impulsive regime in an un-doped lithium niobate (LiNbO3) crystal by two femtosecond laser pulses (36 fs) from a Ti-sapphire laser amplifier. We systematically investigate the role of incident intensity on spectral broadening. At relatively low incident intensity (0.7 TW cm(-2)), spectral broadening in the transmitted beam occurs due to the combined effect of self-phase modulation and cross-phase modulation. At higher incident intensity (10.2 TW cm(-2)), we observe generation of as many as 21 anti-Stokes orders due to coherent anti-Stokes Raman scattering in self-diffraction geometry. Moreover, we observe order-dependent spectral broadening of anti-Stokes lines that may be attributed to the competition with other nonlinear optical effects like cross-phase modulation.

引用

页数：7

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