Super-fluorescence optical fiber light source and method for generating super-fluorescence

Abstract

The invention provides a super-fluorescence optical fiber light source and a method for generating super-fluorescence. The super-fluorescence optical fiber light source comprises a plurality of laser diode (LD) pump sources, a plurality of LD driving power supplies, a pump beam combiner and a gain medium, wherein the LD pump sources are used for outputting laser; the working temperature range of the super-fluorescence optical fiber light source is divided into a plurality of working temperature areas; pump wavelength which is output by each LD pump source is matched with one of the working temperature areas; a plurality of LD driving power supplies respectively supply current to a plurality of LD pump sources; the pump beam combiner is connected with an output end of each LD pump source and used for coupling the output laser and injecting the output laser into the gain medium; the gain medium is used for absorbing the laser which is injected by the pump beam combiner to excite generation and amplification of the super-fluorescence; and part of the amplified super-fluorescence is coupled by the pump beam combiner and then output. In a temperature area switching type pump mode, influence of environment temperature change on the pump wavelength and pump power of each LD pump source is reduced, and severe requirements for temperature control of the LD pump sources are greatly reduced.

Description

technical field [0001] The invention relates to the field of fiber optic gyroscopes, in particular to a superfluorescent fiber optic light source and a method for generating superfluorescence. Background technique [0002] In the application process of fiber optic gyroscope, it is easy to be affected by coherence error and noise caused by backscattering in the fiber ring, polarization coupling effect and Kerr effect. In order to suppress the interference of such errors and noises, fiber optic gyroscopes need to use a wide-spectrum light source. For fiber optic gyroscopes used in precision applications, the zero bias stability needs to be 0.001° / h, and the scale factor stability needs to be 10 -6 Next, this requires that the light source not only has a broad output spectrum, but also has good average wavelength stability. As a low-coherence broadband light source, the superfluorescent fiber optic light source has a wide output spectrum and good average wavelength stability,...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to at least solve one of the above-mentioned technical defects, especially to reduce the impact of ambient temperature changes on LD pump power and pump wavelength, and to solve the need for strict temperature control of LD pump sources in existing superfluorescent optical fiber light sources. deficiencies in control

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