Incoherent super-continuum spectrum light source with controllable spectrum and tunable output power

Abstract

The invention belongs to the technical field of fiber lasers, and particularly relates to an incoherent super-continuum spectrum light source with controllable spectrum and tunable output power. The incoherent super-continuum spectrum light source comprises a random pulse fiber laser, a single-mode fiber, a double-clad ytterbium-doped / tapered ytterbium-doped fiber amplifier and a highly-nonlinearintermediate infrared soft glass fiber. The incoherent super-continuum spectrum light source can realize three modes of incoherent super-continuum spectrum output such as a near-infrared band or an intermediate infrared band, a visible light-near infrared band or a near infrared-intermediate infrared band and a visible light-intermediate infrared band through selecting different super-continuum generation modules. In addition, through performing combined control on the length of the single-mode fiber, the output power of a pumping source in the double-clad ytterbium-doped / tapered ytterbium-doped fiber amplifier and the length of the highly-nonlinear intermediate infrared soft glass fiber, the incoherent super-continuum spectrum light source not only can realize control on the output spectrum range and shape, but also can realize tunable output power of the super-continuum spectrum under the condition that the output spectrum range and shape are fixed.

Description

technical field [0001] The invention belongs to the field of fiber laser technology, and in particular relates to an incoherent supercontinuum light source with controllable spectrum and tunable output power, which can meet the special application requirements of spectrum analysis, food detection, optical communication, biomedical imaging and the like. Background technique [0002] The supercontinuum is the result of a wide range of spectrum broadening under the combined action of multiple nonlinear effects when pulsed lasers are transmitted in nonlinear media. At present, nonlinear media mainly include photonic crystal fibers, highly nonlinear fibers, and fiber amplifiers. Due to the limitations of nonlinear dielectric materials and the wavelength of pump pulse lasers, current supercontinuum light sources are mainly concentrated in the visible-mid-infrared band. [0003] At present, there are relatively few reports on incoherent supercontinuum light sources, but there are m...

AI Technical Summary

Problems solved by technology

The currently reported supercontinuum light sources either cannot meet the special application requirements in some aspects, or some bands of the supercontinuum light source are not used, and only one or two bands are used, resulting in waste of resources and costs

[0004] Therefore, the existing visible-mid-infrared band supercontinuum light source cannot realize the control of the output spectral range and shape, and the output power of the supercontinuum is not tunable when the output spectral range and shape are fixed, which greatly limits the supercontinuum. The scope of application of the light source

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