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

fYear

2002

fDate

17-22 Mar 2002

Firstpage

181

Lastpage

183

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Optical Fiber Communication Conference and Exhibit, 2002. OFC 2002

Print_ISBN

1-55752-701-6

Type

conf

DOI

10.1109/OFC.2002.1036290

Filename

1036290