Ultrafast optical vortex beam generation in the ultraviolet

被引：44

作者：

Chaitanya, N. Apurv ^{[1
,2
]}

Chaitanya Kumar, S. ^{[3
]}

Devi, Kavita ^{[3
]}

Samanta, G. K. ^{[1
]}

Ebrahim-Zadeh, M. ^{[3
,4
]}

机构：

[1] Phys Res Lab, Photon Sci Lab, Ahmadabad 380009, Gujarat, India

[2] Indian Inst Technol, Ahmadabad 382424, Gujarat, India

[3] Barcelona Inst Sci & Technol, Inst Ciencies Foton, ICFO, Castelldefels 08860, Barcelona, Spain

[4] ICREA, Passeig Lluis Co 23, Barcelona 08010, Spain

来源：

OPTICS LETTERS | 2016年 / 41卷 / 12期

关键词：

ORBITAL ANGULAR-MOMENTUM; HIGH-REPETITION-RATE; HIGH-POWER; 266; NM; BETA-BAB2O4; MICROSCOPY; PHOTONS;

D O I：

10.1364/OL.41.002715

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report on the generation of ultrafast vortex beams in the deep ultraviolet (DUV) wavelength range at 266 nm, for the first time to our knowledge. Using a Yb-fiber-based green source in combination with two spiral phase plates of orders 1 and 2, we were able to generate picosecond Laguerre-Gaussian (LG) beams at 532 nm. Subsequently, these LG beams were frequency doubled by single-pass, second-harmonic generation in a 10 mm-long beta-BaB2O4 crystal to generate ultrafast vortex beams at 266 nm with a vortex order as high as 12, providing up to 383 mW of DUV power at a single-pass, green-to-DUV conversion efficiency of 5.2%. The generated picosecond UV vortex beam has a spectral width of 1.02 nm with a passive power stability better than 1.2% rms over > 1.5 h. (C) 2016 Optical Society of America

引用

页码：2715 / 2718

页数：4

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