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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 13 — Jul. 1, 2013
  • pp: 15522–15529

Waveguides fabricated by femtosecond laser exploiting both depressed cladding and stress-induced guiding core

Ming-Ming Dong, Cheng-Wei Wang, Zheng-Xiang Wu, Yang Zhang, Huai-Hai Pan, and Quan-Zhong Zhao  »View Author Affiliations

Optics Express, Vol. 21, Issue 13, pp. 15522-15529 (2013)

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We report on the fabrication of stress-induced optical channel waveguides and waveguide splitters with laser-depressed cladding by femtosecond laser. The laser beam was focused into neodymium doped phosphate glass by an objective producing a destructive filament. By moving the sample along an enclosed routine in the horizontal plane followed by a minor descent less than the filament length in the vertical direction, a cylinder with rarified periphery and densified center region was fabricated. Lining up the segments in partially overlapping sequence enabled waveguiding therein. The refractive-index contrast, near- and far-field mode distribution and confocal microscope fluorescence image of the waveguide were obtained. 1-to-2, 1-to-3 and 1-to-4 splitters were also machined with adjustable splitting ratio. Compared with traditional femtosecond laser writing methods, waveguides prepared by this approach showed controllable mode conduction, strong field confinement, large numerical aperture, low propagation loss and intact core region.

© 2013 OSA

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(220.4610) Optical design and fabrication : Optical fabrication
(230.7380) Optical devices : Waveguides, channeled

ToC Category:
Integrated Optics

Original Manuscript: March 20, 2013
Revised Manuscript: May 24, 2013
Manuscript Accepted: May 30, 2013
Published: June 21, 2013

Ming-Ming Dong, Cheng-Wei Wang, Zheng-Xiang Wu, Yang Zhang, Huai-Hai Pan, and Quan-Zhong Zhao, "Waveguides fabricated by femtosecond laser exploiting both depressed cladding and stress-induced guiding core," Opt. Express 21, 15522-15529 (2013)

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