Broadband wavelength-tunable dispersion-managed all-fiber ultrafast pulse laser and system

Abstract

The present invention provides a chromatic dispersion management all-fiber ultrafast pulse laser with an adjustable broadband wavelength and a chromatic dispersion management all-fiber ultrafast pulselaser system with an adjustable broadband wavelength. The laser comprises a wavelength division multiplexer, a gain optical fiber, a dispersion compensation birefringence filter, a mode locking device and an output coupler which are connected in order through optical fibers; the wavelength division multiplexer is connected with the output coupler, the wavelength division multiplexer is connectedwith an external pumping light source and is configured to obtain the pumping light transmitted by the external pumping light source; the wavelength division multiplexer is configured to perform coupling processing of the pumping light; the gain optical fiber is configured to generate signal light based on the pumping light; the dispersion compensation birefringence filter comprises a Lyot filterunit and a dispersion compensation optical fiber which are connected in order through the optical fiber; the mode locking device is configured to obtain mode locking pulse laser based on the signal light; and the output coupler is configured to output the mode locking pulse laser. The structure is simple, and the wavelength broadband tunable output can be achieved.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a broadband wavelength tunable dispersion managed all-fiber ultrafast pulse laser and a system. Background technique [0002] A laser is a device that emits laser light. A pulsed laser refers to a laser that has a single laser pulse width less than 0.25 seconds and only works once at a certain interval. However, for most existing pulsed lasers, the output spectrum is not tunable. Taking an ytterbium-doped mode-locked pulsed fiber laser as an example, the laser is composed of a polarization-independent isolator, a polarization controller, a polarization-maintaining fiber, a polarization beam splitter and a polarization controller. The ytterbium-doped mode-locked pulsed fiber laser not only has a structure Complex, and the output laser wavelength is not tunable. For the few pulsed lasers that can achieve wavelength-tunable output, there are still some problems. Taking a thulium-d...

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Problems solved by technology

However, for the vast majority of existing pulsed lasers, the output spectrum is not tunable

Taking an ytterbium-doped mode-locked pulsed fiber laser as an example, the laser is composed of a polarization-independent isolator, a polarization controller, a polarization-maintaining fiber, a polarization beam splitter and a polarization controller. The ytterbium-doped mode-locked pulsed fiber laser not only has a structure Complex, and the output laser wavelength is not tunable

For the few pulsed lasers that can achieve wavelength-tunable output, there are still some problems

Taking a thulium-doped mode-locked pulsed fiber laser as an example, the laser uses a tapered fiber filter, a tapered fiber carbon nanotube saturable absorber and an isolator structure, the laser can be tuned by the deformation of the tapered fiber filter To achieve the tunable output of the wavelength, but the deformation of the tapered fiber filter is limited, so the laser does not have broadband tunability, and the tapered fiber is easily damaged during the tuning process

Further, an erbium-doped mode-locked pulsed fiber laser is composed of a polarization-independent isolator, a polarization-maintaining fiber, a saturable absorber, and two polarization controllers. The laser not only has a complex structure, but also has an output wavelength of only 10 nanometers The tunable range of

[0003] Therefore, the existing pulsed lasers need to be further optimized in terms of laser structure, wavelength tunability, and broadband tunable range.

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