Large increase in photosensitivity through massive hydroxyl formation
Optics Letters, Vol. 25, Issue 5, pp. 302-304 (2000)
http://dx.doi.org/10.1364/OL.25.000302
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Abstract
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
[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
Citation
Michael Fokine and Walter Margulis, "Large increase in photosensitivity through massive hydroxyl formation," Opt. Lett. 25, 302-304 (2000)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-25-5-302
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