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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 12 — Jun. 13, 2005
  • pp: 4708–4716

Heat accumulation effects in femtosecond laser-written waveguides with variable repetition rate

Shane M. Eaton, Haibin Zhang, Peter R. Herman, Fumiyo Yoshino, Lawrence Shah, James Bovatsek, and Alan Y. Arai  »View Author Affiliations


Optics Express, Vol. 13, Issue 12, pp. 4708-4716 (2005)
http://dx.doi.org/10.1364/OPEX.13.004708


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Abstract

High-repetition rate femtosecond lasers are shown to drive heat accumulation processes that are attractive for rapid writing of low-loss optical waveguides in transparent glasses. A novel femtosecond fiber laser system (IMRA America, FCPA µJewel) providing variable repetition rate between 0.1 and 5 MHz was used to study the relationship between heat accumulation and resulting waveguide properties in fused silica and various borosilicate glasses. Increasing repetition rate was seen to increase the waveguide diameter and decrease the waveguide loss, with waveguides written with 1-MHz repetition rate yielding ~0.2-dB/cm propagation loss in Schott AF45 glass. A finite-difference thermal diffusion model accurately tracks the waveguide diameter as cumulative heating expands the modification zone above 200-kHz repetition rate.

© 2005 Optical Society of America

OCIS Codes
(230.7370) Optical devices : Waveguides
(320.2250) Ultrafast optics : Femtosecond phenomena
(350.3390) Other areas of optics : Laser materials processing

ToC Category:
Research Papers

History
Original Manuscript: April 29, 2005
Revised Manuscript: June 4, 2005
Published: June 13, 2005

Citation
Shane Eaton, Haibin Zhang, Peter Herman, Fumiyo Yoshino, Lawrence Shah, James Bovatsek, and Alan Arai, "Heat accumulation effects in femtosecond laser-written waveguides with variable repetition rate," Opt. Express 13, 4708-4716 (2005)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-13-12-4708


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