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Fabrication of chirped fibre gratings using etched tapers
L.Dong, J.L.Cruz*, L.Reekie and J.A.Tucknott
Optoelectronics Research Centre, University of Southampton, UK.
* On leave from Departamento Fisica Aplicada, Universidad de Valencia, Dr. Moliner 50, Burjassot, 461 00, Valencia, Spain.
A technique for fabricating fibre gratings with an accurately controlled chirp profile is demonstrated. It involves writing a grating over a section of fibre, the cladding of which has been tapered by etching in HF acid. A strain gradient along the taper is used to produce the chirp either during or after writing. Linearly chirped gratings with bandwidth up to 4.8nm have been demonstrated. Transmission filters have also been demonstrated when a step is made in the taper.
Electronics Letters (1995) Vol.31(11) pp.908-909
Copyright University of Southampton 2006