Title :
Design of λ/4 phase shifted DFB fibre Raman laser
Author :
Hu, Youfang ; Broderick, Neil G R
Author_Institution :
Optoelectron. Res. Centre, Univ. of Southampton, Southampton, UK
Abstract :
We demonstrated an improved design of a DFB fibre Raman laser with an optimised lambda/4 phase-shifted grating structure, which enables highly efficient laser operation at low threshold with a relatively short cavity length. We modelled the laser´s time-dependent behaviour using the standard nonlinear coupled mode equations. Assuming Raman pumping from one side of the grating, we were able to numerically investigate the laser dynamics under CW pumping condition. The values of the parameters used in modelling are achievable in today´s mature fabrication technology.
Keywords :
Raman lasers; coupled mode analysis; diffraction gratings; distributed feedback lasers; fibre lasers; laser beams; laser cavity resonators; nonlinear equations; optical design techniques; CW pumping; Raman pumping; grating structure; lambda/4 phase shifted DFB fibre Raman laser; laser cavity length; laser design; laser dynamics; laser operation; nonlinear coupled mode equations; time-dependent behaviour; Design optimization; Fiber gratings; Fiber lasers; Laser excitation; Laser modes; Nonlinear equations; Optical coupling; Optical design; Pump lasers; Stimulated emission;
Conference_Titel :
Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on
Conference_Location :
Munich
Print_ISBN :
978-1-4244-4079-5
Electronic_ISBN :
978-1-4244-4080-1
DOI :
10.1109/CLEOE-EQEC.2009.5196560
