Tunable single frequency fiber laser based on FP-LD injection locking.

TitleTunable single frequency fiber laser based on FP-LD injection locking.
Publication TypeJournal Article
Year of Publication2013
AuthorsZhang A, Feng X, Wan M, Li Z, Guan B-O
JournalOptics express
Volume21
Issue10
Pagination12874-80
Date Published2013 May 20
Abstract

We propose and demonstrate a tunable single frequency fiber laser based on Fabry Pérot laser diode (FP-LD) injection locking. The single frequency operation principle is based on the fact that the output from a FP-LD injection locked by a multi-longitudinal-mode (MLM) light can have fewer longitudinal-modes number and narrower linewidth. By inserting a FP-LD in a fiber ring laser cavity, single frequency operation can be possibly achieved when stable laser oscillation established after many roundtrips through the FP-LD. Wavelength switchable single frequency lasing can be achieved by adjusting the tunable optical filter (TOF) in the cavity to coincide with different mode of the FP-LD. By adjustment of the drive current of the FP-LD, the lasing modes would shift and wavelength tunable operation can be obtained. In experiment, a wavelength tunable range of 32.4 nm has been obtained by adjustment of the drive current of the FP-LD and a tunable filter in the ring cavity. Each wavelength has a side-mode suppression ratio (SMSR) of at least 41 dB and a linewidth of about 13 kHz.

DOI10.1186/2193-1801-2-276
Alternate JournalOpt Express