Title :
Dynamic behaviour of a Bragg grating spectrum produced by single UV-writing pulses
Author :
Fonjallaz, Pierre-Yves ; Pasiskevicius, Valdas
Author_Institution :
Inst. of Opt. Res., R. Inst. of Technol., Stockholm, Sweden
Abstract :
Transient Bragg wavelength changes as large as 2 nm and increases of the reflectivity of about 25% are observed in a hydrogen-loaded standard telecommunications fibre during and directly after 20 ns irradiating UV-pulses. We present here an experiment aimed at obtaining an estimation of the temperature increase directly after a UV writing pulse. It consists of time-resolved measurements of the reflection and transmission changes of a CW DBR laser launched into the irradiated fibre whose wavelength is tuned to different positions with regard to the grating spectrum
Keywords :
Bragg gratings; distributed Bragg reflector lasers; optical fibre fabrication; optical fibre testing; reflectivity; time resolved spectroscopy; 20 ns; Bragg grating spectrum; CW DBR laser; UV writing pulse; dynamic behaviour; grating spectrum; hydrogen-loaded standard telecommunications fibre; irradiated fibre; ns irradiating UV-pulses; optical fibre Bragg grating fabrication; reflection changes; reflectivity; single UV-writing pulses; temperature increase; time-resolved measurements; transient Bragg wavelength changes; transmission changes; Bragg gratings; Distributed Bragg reflectors; Fiber lasers; Optical reflection; Position measurement; Reflectivity; Telecommunication standards; Temperature; Wavelength measurement; Writing;
Conference_Titel :
Optical Communication, 1998. 24th European Conference on
Conference_Location :
Madrid
Print_ISBN :
84-89900-14-0
DOI :
10.1109/ECOC.1998.732745
