Unlock instant, AI-driven research and patent intelligence for your innovation.

Picosecond laser oscillating source

A picosecond laser and oscillation source technology, which is applied in the structure/shape of lasers, laser parts, and optical resonators, can solve the problems of short service life, toxic dyes, complicated processes, etc., and achieves compact structure and high conversion efficiency. Effect

Inactive Publication Date: 2012-10-10
LIAOCHENG UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] An existing technical solution for generating picosecond laser pulses, such as the Chinese patent application with application number 03114621.X titled "Passively mode-locked Nd:YAG picosecond laser with high light emission time stability", uses dyes as Saturated absorber, the dye is poisonous and easy to be bleached and needs to be replaced frequently, and the service life is short; in addition, the relatively complex circuit control system has strict requirements on the stability of the resonant cavity, which is not conducive to engineering
An existing passive mode-locked picosecond laser technology, such as the application number 200910083431.8, is a Chinese patent application titled "Passive mode-locked picosecond laser", which adopts a stable cavity design of an equivalent confocal cavity and increases the optical path. The size is reduced, but the technology requires strict angles of 0°<θ<1°, which leads to smaller stable area of ​​the laser, low stability, and dual output, which is not very practical; if you want to achieve a single The output of the laser needs to be realized by using more optical components, resulting in high cost and low efficiency of the laser; in addition, special processing of the optical lens is required-cutting gaps, the process is complicated

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Picosecond laser oscillating source
  • Picosecond laser oscillating source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 A picosecond laser oscillation source, with a structure such as figure 1 As shown, it mainly includes a pumping source, a self-focusing lens, a laser crystal and a resonant cavity. The pumping source is placed on one side of the self-focusing lens; both ends of the self-focusing lens are coated with A high antireflection film is placed on one side of the incident surface of the laser crystal, and the light emitted by the pump source is converged into the laser crystal through a self-focusing lens; the incident end surface of the laser crystal is coated with The high anti-reflection film at the wavelength of the oscillating light and the high reflection film at the wavelength of the oscillating light, and the other end is coated with a high-transparency film at the wavelength of the oscillating light; the resonant cavity includes a semiconductor saturable absorber, a first concave mirror, and a second concave mirror And the plane output mirror, the normal of th...

Embodiment 2

[0029] Example 2 A picosecond laser oscillation source, the structure can still refer to figure 1 , but the difference from Example 1 is: the size of the self-focusing lens is The included angle between the normal of the incident surface of the concave mirror and the laser crystal and the oscillation optical path is θ=4°. The transmittance of the planar output mirror is 1%. The laser crystal is Nd:GdVO 4 , whose size is 3mm×3mm×3mm.

Embodiment 3

[0030] Embodiment 3 A picosecond laser oscillation source, the structure is as follows figure 2 As shown, the difference from Embodiments 1 and 2 is that a first plane reflector 8 and a second plane reflector 9 are inserted between the first concave mirror 5 and the second concave mirror 6, so that the resonant cavity can be increased The length of the picosecond pulse can be reduced, the repetition rate of the picosecond pulse can be reduced, and the single pulse energy can be increased. At the same time, the length of the picosecond laser oscillation source can be reduced, which is conducive to the miniaturization of the picosecond laser oscillation source.

[0031] The working principle of the present invention is: as figure 1 , the semiconductor laser diode 1 emits pumping light, the pumping light is focused and incident on the incident surface of the laser crystal 3 through the self-focusing lens 2, and excites the laser crystal to generate radiation light; the radiation...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a picosecond laser oscillating source, mainly comprising a pumping source, a self-focusing lens, a laser crystal and a resonant cavity, wherein the pumping source is arranged at one side of the self-focusing lens; and the light sent by the laser crystal oscillates in the resonant cavity, is modulated by the saturable absorber of a semiconductor to realize mode-locking operation, and then is output by a plane output mirror in a one-way mode. Compared with the prior art, the picosecond laser oscillating source takes a diode laser as the pumping source, the self-focusing lens is taken as an optical coupling system, and the plane output mirror is taken as a cavity mirror so as to realize one-way output, thus the picosecond laser oscillating source with compact structure, simpleness and practicality, high conversion efficiency and stable performance is obtained.

Description

technical field [0001] The invention relates to an ultrashort pulse laser, in particular to a picosecond laser oscillation source. Background technique [0002] In 1992, U.Keller and others successfully developed a semiconductor saturable absorber mirror (SESAM) and applied it to a mode-locked laser. Since then, people have started to study SESAM mode locking from different angles. Because SESAM mode-locked laser has the characteristics of simple structure, high beam quality and high stability, it is widely used in industry, medical treatment, material processing, scientific research, nonlinear frequency conversion, etc. Usually, the repetition frequency of the mode-locked pulse directly generated by the mode-locked laser is high, and the single pulse energy is low, which limits the application in some fields. In order to obtain high-energy ultrashort pulses, laser pulses need to be amplified. However, to obtain high-energy laser pulses with stable performance, a stable m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/0941H01S3/098H01S3/08H01S3/106
Inventor 张丙元王国菊王文军
Owner LIAOCHENG UNIV