Optical fiber laser with multi-wavelength output

Abstract

The optical fiber laser with multiband output includes pump source, light coupler, polarization controller, light splitter, array waveguide grating and light beam splitter connected successively to constitute loop. The present invention realizes the multiband amplification with single pump source by connecting AWG into fiber loop with doped fiber, using the AWG as intracavity light filler to select resonant wavelength and amplify radiation, and coupling the AWG multiplexing end to doped fiber. The device of the present invention has simple and small integrated structure, various light source with different wavelength and wavelength interval may be realized via altering AWG structure parameters, and standard wavelength and wavelength interval of C-band and L-band in ITU-T may be realized reliably.

Description

technical field [0001] The invention relates to a fiber optic light source, in particular to a fiber optic light source with multi-wavelength output, suitable for using amplified spontaneous emission (ASE) light as an auxiliary pump source. Background technique [0002] Broadband light sources have been studied continuously due to their many applications such as extension to gyroscopic sensors, light sources for testing optical components, and modulated spectra for general access networks. In particular, light sources utilizing ASE light from optical fibers doped with rare earth metals (such as erbium) are relatively good broadband light sources because they exhibit characteristics of wide band, high power, and low loss. For this erbium-doped optical fiber ( All research efforts made by EDF) broadband light sources are about the single band from 1520 to 1560 nanometers, that is, the C-band (C-Band). Most of the existing optical communication components and the traditional er...

AI Technical Summary

Problems solved by technology

However, there is no relatively mature multi-channel multi-wavelength output structure at present. The common method is to make single-wavelength (DBR—Distributed Bragg Reflector) lasers or fiber lasers into arrays and package them together, which has complex structures and unstable performance. , and each wavelength requires a separate driving voltage or temperature control, etc.

Recently, tunable lasers based on mode locking have received a lot of attention, but this method has special limitations on the transmission rate. In recent years, Arrayed Waveguide Grating (AWG—Arrayed Waveguide Grating) technology has developed rapidly. Its performance, The price has reached the level of commercialization, arrayed waveguide grating AWG can be used as an integrated optical filter array, but the application of arrayed waveguide grating AWG to fiber laser has not yet been found

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