Title :
Design of temperature insensitive depolarizer for Raman pump laser diode
Author :
Matsushita, S. ; Shinozaki, J. ; Emori, Y. ; Namiki, S.
Author_Institution :
FITEL Photonics Lab., Furukawa Electr. Co. Ltd, Chiba, Japan
Abstract :
We have presented about design of temperature insensitive depolarizer for Raman pump laser diode using optimization of the length of the output pigtail polarisation mode fibre (PMF) and the depolarizer. Then the temperature dependence of degree of polarisation (DOP) caused by the state of polarisation (SOP) fluctuation in front of depolarizer have been demonstrated through the simulation where the thermal expansion and the beat length variation of output PMF were included. We have obtained good agreement simulation and experimental results. Applying the simulation results on designing the depolarizer and the output PMF, we have successfully suppressed the variation of DOP and decreased the DOP value, less than 4%.
Keywords :
Raman lasers; fluctuations; optical communication equipment; optical design techniques; optical fibre polarisation; optical pumping; semiconductor lasers; Raman pump laser diode; SOP fluctuation; degree of polarisation; depolarizer; output PMF; output pigtail polarisation mode fibre; state of polarisation; temperature dependence; temperature insensitive depolarizer; thermal expansion; Diode lasers; Doped fiber amplifiers; Erbium-doped fiber lasers; Laser excitation; Optical design; Optical fiber polarization; Optical polarization; Pump lasers; Stimulated emission; Temperature dependence;
Conference_Titel :
Optical Fiber Communication Conference and Exhibit, 2002. OFC 2002
Print_ISBN :
1-55752-701-6
DOI :
10.1109/OFC.2002.1036290
