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Optica Publishing Group
  • Optical Fiber Communications Conference
  • OSA Trends in Optics and Photonics (Optica Publishing Group, 2002),
  • paper ThGG16

An Insertion Loss Insensitive and Mean Wavelength Stable Polarized Superfluorescent Fiber Source

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Abstract

A mean wavelength stable and broadband light source is desirable for the characterization of WDM components and also essential to the stringent requirements of a fiber optic gyroscope (FOG) for the reduction of noises and bias errors. Recently, superfluorescent fiber sources (SFSs) become popular as broadband light sources for such applications due to their little sensitivity to environment factors (e.g., temperature) and better spectral quality. Four common basic configurations of SFSs have been studied: single-pass forward (SPF), single-pass backward (SPB), double-pass forward (DPF), and double-pass backward (DPB) configurations.1–5 When a standard unpolarized SFS is used as the source for polarization sensitive applications, half of its power is lost, for example, to the polarizer at the input of the sensing coil in an FOG. If the light produced by the SFS is polarized instead, the loss would be eliminated. In this work, we propose a novel linearly polarized SFS based on DPB configuration. Compared with the conventional unpolarized SFS, its output power in the desired polarization is increased to nearly 1.7 times by inserting a po-larizer between the rear WDM and the fiber mirror. Moreover, accompanying advantage such as insensitivity to the polarizer insertion loss and wide operational range of wavelength stability shall be demonstrated.

© 2002 Optical Society of America

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