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Optics Letters

Optics Letters


  • Vol. 25, Iss. 5 — Mar. 1, 2000
  • pp: 302–304

Large increase in photosensitivity through massive hydroxyl formation

Michael Fokine and Walter Margulis  »View Author Affiliations

Optics Letters, Vol. 25, Issue 5, pp. 302-304 (2000)

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We report a large increase in photosensitivity of germanium-doped silicate fibers by rapid heat treatment of hydrogen-loaded fibers at 1000 °C before exposure of the fibers to 242-nm radiation. The increase in photosensitivity is compared with thermally induced absorption caused by introduction of massive amounts of hydroxyl species. The absorption loss was measured to be 0.02 dB/cm mol.% OH at 1.55 μm. Strong gratings (Δn > 1 × 10-4) in germanium-free phosphorous-doped fibers in the presence of 242-nm radiation have also been manufactured by this technique.

© 2000 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(060.2290) Fiber optics and optical communications : Fiber materials
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.2400) Fiber optics and optical communications : Fiber properties

Michael Fokine and Walter Margulis, "Large increase in photosensitivity through massive hydroxyl formation," Opt. Lett. 25, 302-304 (2000)

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