Adjustable saturable absorbing device, production method of adjustable saturable absorbing device and application of adjustable saturable absorbing device in time domain output mode adjustable optical fiber pulse laser device

Abstract

The invention discloses an adjustable saturable absorbing device, a production method of the adjustable saturable absorbing device and an application of the adjustable saturable absorbing device in a time domain output mode adjustable optical fiber pulse laser device. Multiple types of low-dimensional nano materials are deposited or transferred onto a transparent optical substrate or an optical substrate with a reflecting rate of 0.1%-99.9% and the optical substrate is arranged inside a movable or rotatable device to form the adjustable saturable absorbing device; the adjustable saturable absorbing device is applied to the optical fiber pulse laser device to achieve a method of switchover among a continuous laser output mode, a Q-switching laser output mode, a mode locking pulse output mode and the like. The adjustable saturable absorbing device can adjust the optical parameters such as linear absorption and nonlinear absorption to achieve switchover among the continuous laser output mode, the Q-switching laser output mode, the mode locking pulse output mode and the like and accordingly to provide better pulse working states; by introducing a new degree of freedom, the adjustable saturable absorbing device also provides a mode for regulating and controlling the pulse laser output working modes; the pulse laser working modes based on the adjustable saturable absorbing device is adjustable, high in stability and power and wide in working wavelength range.

Description

technical field [0001] The invention belongs to the field of nonlinear optics and laser technology, and specifically relates to an adjustable saturable absorption device, a preparation method and an application of a fiber pulse laser based on the device. Background technique [0002] Pulse refers to a working method that occurs only once at a certain interval. A laser that operates in pulsed mode is a pulsed laser. This type of laser has high pulse energy and good cutting quality. It is a high-end product in processing laser products. In recent years, it has been widely used in optical communication systems, photoelectric sensors, biomedicine, and precision machining. There are generally two ways to realize laser pulses: mode locking and Q switching. [0003] Mode-locked lasers are a general term for lasers whose output light pulse width is on the order of picoseconds or shorter (1 picosecond = 10 -12 seconds), with the characteristics of high peak power and high time sen...

AI Technical Summary

Problems solved by technology

However, in practical applications, there are a series of problems such as limited spectral bandwidth, difficult coupling, and low damage threshold.

And because the coupling mode of conventional saturable absorber devices (such as SESAM) and the laser optical path is determined, lasers based on such saturable absorber devices cannot switch between multiple different time modes. The single output mode of this time domain limitations, which limit the parameter characteristics and application prospects of this type of laser based on conventional saturable absorbers

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