Title :
Room-temperature operation of widely tunable loss filter
Author :
Shu, Xuewen ; Allsop, T. ; Gwandu, B. ; Zhang, Lin ; Bennion, I.
fDate :
2/15/2001 12:00:00 AM
Abstract :
A widely tunable and room-temperature operational loss filter based on a long-period fibre grating (LPFG) fabricated in a B/Ge codoped fibre is reported. The filter exhibits extremely high temperature sensitivity. A maximum spectral shift of -48.1 nm from 10 to 40°C is achieved, corresponding to a thermal tuning efficiency of 1.6 nm/°C. This value is increased by more than one order of magnitude compared with the LPFGs fabricated in standard telecom fibre and even twice that of a LPFG with sensitivity enhanced by a special polymer
Keywords :
boron compounds; diffraction gratings; germanium compounds; optical fibre filters; optical fibre losses; silicon compounds; 10 to 40 degC; SiO2:GeO2,B2O3; codoped fibre; long-period fibre grating; maximum spectral shift; room-temperature operation; sensitivity; temperature sensitivity; thermal tuning efficiency; widely tunable loss filter;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20010166
