Mechanisms of photosensitivity enhancement in OH-flooded standard germanosilicate preform plates

Lancry, Matthieu; Poumellec, Bertrand; Beugin, V.; Niay, P.; Douay, M.; Depecker, C.

doi:10.1016/j.jnoncrysol.2006.09.030

Cited by 7 publications

(1 citation statement)

References 16 publications

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“…Optical processing can be done with non-coherent sources, including low power UV lamps [29] and external solar hypersensitisation using the sun [32]. These extremely low energies of formation suggested hydride is the initial hydrogen reaction species which was subsequently confirmed [56]. As well as laser processing, temperature processing is possible -thermal hypersensitisation of phosphosilicate optical fibres at temperatures as low as 80°C has been reported [57].…”

Section: Type Ihs (Hypersensitised) Gratingsmentioning

confidence: 99%

Fibre gratings and devices for sensors and lasers

Canning

2008

Laser & Photonics Reviews

262

158

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Although mainstream grating writing, more often than not using single photon excitation of germanosilicate based defects with CW 244 nm light, remains the key technology for complex devices it is now being complemented by a whole host of processes which can enhance and tailor the properties of both conventional and not-so-conventional fibre Bragg gratings. Further, processes for writing of gratings in non-germanosilicate fibres have also continued to develop and include multi-photon excitation directly into the band edge of the glass. It is now possible to custom tailor a gratings property based on the application and the nature of production as well as custom tailor the grating writing process to suit the type of fibre and application. Examples and suggestions where these can benefit sensors and lasers are outlined.The various diffraction orders produced through a phase mask during UV direct writing of Bragg gratings -the two brightest are the +1 and −1 orders whilst the central zero order is suppressed most. This method remains the most commonly used approach to fibre Bragg grating writing, including in very large diameter fibres.

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