Optical fiber polarized super fluorescent light source

Abstract

This invention relates to a fiber polarized super fluorescence light source including: setting a first broadband reflector, a first doped fiber, a first double-color plate, an optical isolator, a first polarized beam-splitter, a Faraday rotatory device, a second polarized beam-splitter, a second double color plates, a second doped fiber, 1 / 4 wave plate and a second broadband reflector on a same optical axis, the included angle of the first and second double color plates and said optical axis is 45deg., a first pump light source is set at th cross point of the first double color plate and said optical axis and vertical to the optical axis, a second pump light source is set at the cross point of the second double color plate and the axis and vertical to the axis, a third broadband reflector is set at the cross point of the second polarized beam splitter and said axis and vertical to the axis direction and the direction vertical to the axis at the cross point of the first polarized beam splitter and the axis is the output direction of the polarized fluorescence light.

Description

technical field [0001] The invention belongs to an optical fiber light source, in particular to an optical fiber polarized super fluorescent light source. Background technique [0002] Hyperfluorescence is a transition state between laser and fluorescence, which is amplified spontaneous emission. Due to its superior performance such as wide bandwidth, high output power and high stability of average wavelength, doped fiber superfluorescent fiber source has been widely used in many fields such as fiber optic gyroscope, fiber optic sensing, and spectral testing. At present, most commercial broadband light sources are superluminescent diodes (hereinafter referred to as SLDs), but SLDs have short life, poor wavelength stability, low output power, and limited coupling with single-mode fibers, so doped fiber superfluorescent light sources are used as SLDs. Alternative products have great potential. [0003] In order to obtain superfluorescence in different bands, different doped ...

AI Technical Summary

Problems solved by technology

Since the output of the usual super fluorescent light source is non-polarized light, in this case, 50% of the energy will be lost through a polarizer

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