A picosecond pulsed fiber laser

Abstract

The invention relates to the field of laser, and provides a picosecond pulse optical fiber laser device comprising a mode-locking picosecond pulse optical fiber laser device seed source, a first-order amplification system, a first band-pass optical fiber filter, a second-order amplification system, an acoustic-optical modulator, a second band-pass optical fiber filter, a third-order amplification system, a fourth-order amplification system and an output end cap. The switching period and the opening time of the acoustic-optical modulator are regulable. Pulse output frequency is regulated by regulating the switching period, and the number of pulses is regulated by regulating the opening time so that low-frequency and high-peak-power laser pulses are obtained. Frequency modulation is performed by the acoustic-optical modulator so that low-frequency picosecond pulses are obtained, and then the stable, low-frequency and high-peak-power picosecond laser pulses are obtained through all orders of the amplification systems. The picosecond pulse optical fiber laser device is simple in structure, multiple universal devices are specially and reasonably designed and the functions are enabled to coordinate ingeniously so that stable, frequency-regulable and high-peak-power picosecond laser output can be realized, and thus the picosecond pulse optical fiber laser device has wide application in the field of laser processing and the like.

Description

technical field [0001] The invention belongs to the field of laser technology, in particular to a picosecond pulse fiber laser. Background technique [0002] Ultrashort pulse fiber lasers have broad application prospects in the fields of communication, military, industrial processing, medicine, optical information processing, full-color display and laser printing. Its most direct application is as an ultrafast light source to form a variety of time-resolved spectroscopy techniques and pumping / detection techniques. As a seed light source for ultrafast laser amplifiers, it can be used in fiber-optic parametric oscillators and amplifier systems, and can be used for periodic Polarized lithium niobate (PPLN) is used for efficient frequency doubling or frequency conversion. Its development has driven the research of physics, chemistry, biology, materials and information science into the field of microscopic ultrafast processes. Especially in the field of sapphire processing, FPD...

AI Technical Summary

Problems solved by technology

This method relies on the pulse modulation of the semiconductor laser, and generally can only obtain a pulse output with a pulse width of several hundred picoseconds, and it is difficult to obtain a pulse with a pulse width of tens of picoseconds, so it is difficult to achieve a high peak power output

There is also a scheme that uses picosecond pulsed fiber laser as a seed source to switch to a solid-state amplifier or a rod-shaped large-core fiber amplifier for high peak power amplification. Obviously, such a system inevitably has a process of fiber output and spatial light conversion, so unavoidable It will have a serious impact on the stability of the system output and the reliability of the system

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