Frequency modulation of Er-doped fiber lasers using a piezo-mounted fiber grating: prospect for distributed leak monitoring

摘要

Piezo-mounted fiber-grating output coupler is proposed as a tuning element in an Er$+3$PLU$/-doped fiber laser. Tuning range in excess of 2 nm has been obtained in the vicinity of 1.57 $mu@m. Such a tuning element is both compatible with wavelength modulation spectroscopy (WMS) and fiber laser intra-cavity spectroscopy (FLICS). CO leak detection was demonstrated using both geometries. $Delta$alpha of 9 $MUL 10$+$MIN@4$/ were measured with WMS while FLICS did not lead to the expected increase of sensitivity.