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An approach to achieve spectral filtering is proposed, using a fibre Bragg grating (FBG) embedded polarisation maintaining fibre Sagnac loop mirror (SLM) through temperature tuning. The opposite temperature sensitivities of the FBG Bragg resonance wavelengths and the interferometric peaks of the fibre SLM, as well as their pronounced difference in bandwidth, provide an opportunity to realise spectral...
Fibre Bragg gratings were written through the polyimide coating of commercial high NA fibres with ultrafast 800 nm radiation. Index modulations =2times10-4 remain after 140 hours at 360degC.
Fibre Bragg gratings (FBG), written in multimode 105??m core diameter silica fibre using ultrafast IR radiation, were probed using fibre collimators. Potential FBG usage as cavity reflectors in large mode area fibre lasers is discussed.
Fibre Bragg gratings were written in pure silica photonic crystal fibre tapers with 125 fs, 800 nm IR radiation. High reflectivity single and multimode responses were achieved with short exposure times.
We report for the first time Fibre Bragg gratings (FBGs) written in un-doped fluoride fibres. The gratings were written using femtosecond IR radiation from a Ti: Sapphire laser amplifier and the phase mask method.
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