High energy redshifted and enhanced spectra broadening by molecular alignment

被引：19

作者：

Fan, G. ^{[1
]}

Safaei, R. ^{[1
]}

Kwon, O. ^{[1
]}

Schuster, V ^{[2
]}

Legare, K. ^{[1
]}

Lassonde, P. ^{[1
]}

Ehteshami, A. ^{[1
]}

Arias, L. ^{[3
]}

Laramee, A. ^{[1
]}

Beaudoin-Bertrand, J. ^{[3
]}

Limpert, J. ^{[2
]}

Tao, Z. ^{[4
]}

Spanner, M. ^{[5
]}

Schmidt, B. E. ^{[6
]}

Ibrahim, H. ^{[1
]}

Baltuska, A. ^{[7
]}

Legare, F. ^{[1
]}

机构：

[1] Inst Natl Rech Sci, Ctr Energie Mat & Telecommun, 1650 Blvd Lionel Boulet, Varennes, PQ J3X 1S2, Canada

[2] Friedrich Schiller Univ Jena, Abbe Ctr & Photon, Inst Appl Phys, Jena, Germany

[3] Univ Laval, Dept Phys Genie Phys & Opt, Ctr Opt Photon & Laser COPL, Quebec City, PQ G1V 0A6, Canada

[4] Fudan Univ, Dept Phys, State Key Lab Surface Phys, Shanghai 200433, Peoples R China

[5] Natl Res Council Canada, 100 Sussex Dr, Ottawa, ON K1A 0R6, Canada

[6] Few Cycle Inc, 2890 Rue Beaurivage, Montreal, PQ H1L 5W5, Canada

[7] TU Wien, Inst Photon, Gusshausstr 27-387, Vienna, Austria

来源：

OPTICS LETTERS | 2020年 / 45卷 / 11期

基金：

加拿大创新基金会; 加拿大自然科学与工程研究理事会;

关键词：

LASER; COMPRESSION; PULSES;

D O I：

10.1364/OL.387037

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate an efficient approach for enhancing the spectral broadening of long laser pulses and for efficient frequency redshifting by exploiting the intrinsic temporal properties of molecular alignment inside a gas-filled. hollow-core fiber (HCF). We find that laser-induced alignment with durations comparable to the characteristic rotational time scale T-Rot(Align) enhances the efficiency of redshifted spectral broadening compared to noble gases. The applicability of this approach to Yb lasers with (few hundred femtoseconds) long pulse duration is illustrated, for which efficient broadening based on conventional Kerr nonlinearity is challenging to achieve. Furthermore, this approach proposes a practical solution for high energy broadband long-wavelength light sources, and it is attractive for many strong field applications. (C) 2020 Optical Society of America

引用

页码：3013 / 3016

页数：4

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