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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 21, Iss. 9 — Sep. 1, 2003
  • pp: 1969–

Vacuum-Ultraviolet Laser-Induced Refractive-Index Change and Birefringence in Standard Optical Fibers

Kevin P. Chen, Peter R. Herman, Rod Taylor, and Cyril Hnatovsky

Journal of Lightwave Technology, Vol. 21, Issue 9, pp. 1969- (2003)


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Abstract

Strong photosensitivity responses with the use of above-bandgap 157-nm F2-laser radiation are reported for standard germanosilicate fiber. A large 1.3 × 10-3 effective index change at 1.55 µm was inferred by trimming strong and weak Bragg gratings in hydrogen-free fiber. The F2-laser fluence-processing window of < 50~ mJ/cm2 is much lower than with traditional ultraviolet (UV) lasers. For hydrogen-soaked fiber, highly asymmetric refractive-index profiles were noted by atomic force microscopy and microreflection microscopy, yielding a peak index change of > 0.01 across a small 1-µm penetration depth at the fiber core. The index asymmetry appears to underlie the large > 5 × 10-5 value of laser-induced birefringence.

© 2003 IEEE

Citation
Kevin P. Chen, Peter R. Herman, Rod Taylor, and Cyril Hnatovsky, "Vacuum-Ultraviolet Laser-Induced Refractive-Index Change and Birefringence in Standard Optical Fibers," J. Lightwave Technol. 21, 1969- (2003)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-21-9-1969

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