Experimental and theoretical research on second harmonic optical vortex generated by laser inscribed 3D holograms
Author:
Affiliation:

1.School of physics and optoelectronic Engineering, Xidian University, Xi’an 710071, China, Texas A&M University at Qatar, Doha 23874, Qatar;2.Laser Physics Centre, Research School of Physics, Australian National University, Canberra, ACT 2601, Australia, Texas A&M University at Qatar, Doha 23874, Qatar;3.Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China, Texas A&M University at Qatar, Doha 23874, Qatar;4.Science Program, Texas A&M University at Qatar, Doha 23874, Qatar

Clc Number:

O437;O436.1

Fund Project:

Supported by the Young Scientists Fund of the National Natural Science Foundation of China (11904273);the?Fundamental?Research?Funds?for?the?Central?Universities(10251180017)

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    Abstract:

    Optical vortex is normally generated via a beam shaping process by irradiating a Gaussian beam through an external optical element or structure. Laser induced photorefractive structures can direct endow beam shaping functions inside materials, which can be stable and easy for the integration of devices. However, this is a method based on linear diffraction and normally cannot obtain efficient second harmonic optical vortex. To solve this problem, firstly, the effects of laser writing parameters on the resolution and maximal depth of photorefractive structures were experimentally investigated in lithium niobite. As a proof of concept, cross-shaped second harmonic vortex beams were obtained by illuminating a fundamental Gaussian beam through a 3D fork hologram. Then it was theoretically demonstrated that phase-matched second harmonic vortex beams can be generated by utilizing the Bragg diffraction of fundamental beam in the wavelength range between 1.074~3.716 μm.

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CHEN Xin, YIN Heng, LIU Shan, ZHAO Bi-Jun, WANG Jun-Li, SHENG Yan, WEI Zhi-Yi, KROLIKOWSKI Wieslaw. Experimental and theoretical research on second harmonic optical vortex generated by laser inscribed 3D holograms[J]. Journal of Infrared and Millimeter Waves,2021,40(1):102~107

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History
  • Received:April 11,2020
  • Revised:January 14,2021
  • Adopted:May 13,2020
  • Online: January 06,2021
  • Published: