Super-continuum spectrum light source based on dual-band seed source Er-Yb co-doped optical fiber amplifier

Abstract

The invention belongs to the technical field of fiber lasers, is used for solving the technical problems of high flatness, wide spectral region and high output average power which are needed by a super-continuum spectrum light source, and provides a super-continuum spectrum light source based on a dual-band seed source Er-Yb co-doped optical fiber amplifier. The super-continuum spectrum light source based on the dual-band seed source Er-Yb co-doped optical fiber amplifier comprises a 1550 nm wave band pulse optical fiber laser, a 1064 nm wave band pulse optical fiber laser, a multichannel digital delay pulse generator, a wavelength division multiplexer, a pump combiner, a semiconductor laser pumping source and Er-Yb co-doped optical fibers. Due to the fact that 1550 nm wave band pulse lasers and 1064 nm waveband pulse lasers are amplified simultaneously in the Er-Yb co-doped optical fiber amplifier, the expansion of the super-continuum spectrum towards long wavelengths is facilitated, and the flatness and the conversion efficiency are improved; and the Er-Yb co-doped optical fibers of large mode field areas are utilized as gain mediums and non-linear mediums to achieve the output of super-continuum spectrums, and the realization of the high average super-continuum spectrum light source is further facilitated.

Description

technical field [0001] The invention belongs to the field of fiber laser technology, and in particular relates to a supercontinuum light source based on a dual-band seed source erbium-ytterbium co-doped fiber amplifier. Background technique [0002] The generation of supercontinuum refers to the phenomenon that when a narrowband laser is transmitted in a nonlinear optical medium, due to the dispersion of the medium and various nonlinear effects, the spectrum of the outgoing laser is greatly broadened. The supercontinuum light source not only has the high brightness and good directivity of the laser light source, but also has an extremely wide output spectrum, which can be widely used in various fields that require a wide-spectrum light source. So far, the application of supercontinuum light sources has been extended to many fields, including nonlinear spectroscopy, optical coherence tomography, ultra-precision time and frequency measurement, broadband optical fiber communica...

AI Technical Summary

Problems solved by technology

The erbium-ytterbium co-doped amplifier amplifies the laser in the 1550nm band, which is conducive to the expansion of the supercontinuum to long wavelengths, but the amplification efficiency is low, and the ytterbium ion has a strong amplified spontaneous emission (ASE) in the 1μm band, which is not conducive to the output of the amplifier power boost

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