Near-infrared wavelength tunable totally-positive dispersion femtosecond optical fiber laser

Abstract

The invention relates to a near-infrared wavelength tunable totally-positive dispersion femtosecond optical fiber laser which comprises an optical fiber oscillator and a pulse width compression device. The optical fiber oscillator is connected with a band-pass filter through an LD pumping source, the band-pass filter is connected with a wavelength division multiplexer, the wavelength division multiplexer is connected with an ytterbium doped gain optical fiber, the ytterbium doped gain optical fiber is connected with a first single mode optical fiber, the first single mode optical fiber is connected with a discrete component, a collimating apparatus is connected with a second single mode optical fiber, and the second single mode optical fiber is welded with the wavelength division multiplexer. The pulse width compression device is connected with a high mirror through a second half wave plate, the high mirror is respectively connected with a second polarization splitting prism and two reflecting type optical gratings, the two reflecting type optical gratings are connected with a silver mirror, and the silver mirror is connected with a silver mirror bracket. The near-infrared wavelength tunable totally-positive dispersion femtosecond optical fiber laser is good in heat dissipation performance, high in light beam quality, compact in structure, small and exquisite in size, low in cost, high in light conversion efficiency and good in environmental stability.

Description

technical field [0001] The invention relates to a fiber laser, in particular to a total positive dispersion femtosecond fiber laser with a wavelength near 1 micron and a center wavelength tunable from 1020nm to 1050nm. Background technique [0002] Ultrashort pulse laser refers to pulse laser with extremely narrow width in time. Its characteristics of high peak power, narrow pulse width and wide spectrum make it play an irreplaceable role in many fields. Information acquisition technologies that use ultrashort pulse lasers as probes, such as time-resolved spectroscopy, femtosecond streak cameras, pump-probe technology, time-resolved Raman spectroscopy, ultra-high time-resolved scanning probe microscopy, etc. These ultra-fast information acquisition technologies have greatly promoted the development of ultra-fast technology. Directly bring the research of physics, chemistry, biology, material information and science into the field of microscopic ultrafast processes, and cre...

AI Technical Summary

Problems solved by technology

Due to the introduction of positive and negative dispersion elements, the pulse is periodically stretched and compressed in the cavity. When the pulse is chirped, the pulse width is increased, the nonlinear effect is reduced, and the energy of this pulse is increased by an order of magnitude, but Continuing to increase the single pulse energy will cause instability

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