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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 18 — Jun. 20, 2003
  • pp: 3505–3508

Beam homogenizer for hollow-fiber delivery system of excimer laser light

Yuji Matsuura, Daisuke Akiyama, and Mitsunobu Miyagi  »View Author Affiliations


Applied Optics, Vol. 42, Issue 18, pp. 3505-3508 (2003)
http://dx.doi.org/10.1364/AO.42.003505


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Abstract

A beam homogenizer for a hollow-fiber-based, UV laser delivery system is proposed. A rectangular glass waveguide with an inner aluminum coating that has a 1-mm square cross section is attached at the output end of the circular-core hollow fiber with a 1-mm inner diameter. The rectangular waveguide generates a number of higher-order modes and results in a uniform top-hat profile. The configuration of the waveguide is designed by a ray-tracing technique so that both the low transmission loss and the high uniformity in the output beam are obtained. The fabricated waveguide shows a low loss of 0.4 dB, and the intensity variation coefficient is 7%. The output beam from the rectangular waveguide is expanded by a lens to the size larger than 10-mm square. It is also shown that the profile does not change with the bending condition.

© 2003 Optical Society of America

OCIS Codes
(060.2340) Fiber optics and optical communications : Fiber optics components
(140.2180) Lasers and laser optics : Excimer lasers
(230.7370) Optical devices : Waveguides

History
Original Manuscript: November 5, 2002
Revised Manuscript: March 27, 2003
Published: June 20, 2003

Citation
Yuji Matsuura, Daisuke Akiyama, and Mitsunobu Miyagi, "Beam homogenizer for hollow-fiber delivery system of excimer laser light," Appl. Opt. 42, 3505-3508 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-18-3505

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