Title :
Narrow linewidth operation of an erbium fiber laser containing a chirped Bragg grating etalon
Author :
Forster, R.J. ; Langford, N. ; Gloag, A. ; Zhang, L. ; Williams, J.A.R. ; Bennion, I.
Author_Institution :
Dept. of Phys. & Appl. Phys., Strathclyde Univ., Glasgow, UK
fDate :
11/1/1997 12:00:00 AM
Abstract :
A numerical model is presented which shows that a control signal suitable for preventing longitudinal mode hops can be derived by sensing changes in the polarization state of the light reflected from an intracavity etalon. This is verified experimentally by including a continuous fiber etalon formed from chirped Bragg reflectors in a unidirectional erbium ring fiber laser. Mode hop free operation is observed with resolution limited linewidths of 170 kHz
Keywords :
chirp modulation; diffraction gratings; erbium; fibre lasers; frequency control; laser cavity resonators; laser modes; laser theory; light interferometers; optical fibre polarisation; optical variables control; ring lasers; spectral line breadth; chirped Bragg grating etalon; chirped Bragg reflectors; continuous fiber etalon; control signal; erbium fiber laser; intracavity etalon; longitudinal mode hops; narrow linewidth operation; numerical model; polarization state; resolution limited linewidths; unidirectional Er ring fiber laser; Bragg gratings; Chirp; Erbium; Erbium-doped fiber lasers; Fiber gratings; Frequency; Laser mode locking; Laser modes; Optical fiber polarization; Ring lasers;
Journal_Title :
Lightwave Technology, Journal of
