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Open AccessArticle

Fabrication of an Optical Waveguide-Mode-Field Compressor in Glass Using a Femtosecond Laser

1
State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
3
School of Physical Science and Technology, Shanghai Tech University, Shanghai 200031, China
4
State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
5
XXL—The Extreme Optoelectromechanics Laboratory, School of Physics and Materials Science, East China Normal University, Shanghai 200241, China
6
Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
*
Authors to whom correspondence should be addressed.
Materials 2018, 11(10), 1926; https://doi.org/10.3390/ma11101926
Received: 6 September 2018 / Revised: 29 September 2018 / Accepted: 5 October 2018 / Published: 10 October 2018
(This article belongs to the Special Issue Intense Optical Pulse Processing)
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PDF [963 KB, uploaded 10 October 2018]
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Abstract

We report on fabrication of an optical waveguide-mode-field compressor in glass using a femtosecond laser. Our approach is based on building up a stress field within the waveguiding area which is realized by sandwiching the waveguide between a pair of laser-induced-modification-tracks. To induce an adiabatic conversion of the optical mode in the waveguide, the tracks are intentionally designed to be tapered along the waveguide. We show that our technique can allow for reducing the mode field size in a single mode waveguide from more than 10 μm to around 7 μm. View Full-Text
Keywords: optical waveguide; femtosecond laser direct writing; mode-field compressor optical waveguide; femtosecond laser direct writing; mode-field compressor
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Liu, Z.; Liao, Y.; Wang, Z.; Zhang, Z.; Liu, Z.; Qiao, L.; Cheng, Y. Fabrication of an Optical Waveguide-Mode-Field Compressor in Glass Using a Femtosecond Laser. Materials 2018, 11, 1926.

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