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Apparatus for full optical fiber Q-switched laser by using butt joint loss variety

A loss-changing, all-fiber technology, which is applied in the direction of lasers, laser components, and the structure/shape of active media, can solve problems such as increasing the insertion loss of resonators, increasing the difficulty of practical promotion, and reducing overall performance, so as to increase transmission loss. , Reduce mechanical stability requirements, easy to control the effect

Inactive Publication Date: 2008-06-18
TSINGHUA UNIV
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  • Application Information

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Problems solved by technology

Electro-optic Q-switching requires a higher voltage; while acousto-optic Q-switching has relatively poor switching capability and is mostly used for low-gain lasers, and both of these two methods insert block-shaped adjustment units, which have a complex structure and increase the resonant cavity. Insertion loss reduces the overall performance, and at the same time puts forward higher requirements for the alignment accuracy and mechanical stability of the components in the cavity, which increases the difficulty of practical promotion

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  • Apparatus for full optical fiber Q-switched laser by using butt joint loss variety
  • Apparatus for full optical fiber Q-switched laser by using butt joint loss variety
  • Apparatus for full optical fiber Q-switched laser by using butt joint loss variety

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Embodiment Construction

[0036] The invention provides a method for generating all-fiber Q-switched laser by utilizing the change of butt loss, and its specific steps are as follows:

[0037]1) In the fiber laser, two or more sections of optical fiber are horizontally butt-jointed, and the two ends are bonded together, so that the fiber laser is in a high-Q state; the optical fiber used is double-clad optical fiber 1, or non-doped ordinary optical fiber 3 , the end face of the optical fiber is a plane or a spherical surface that is ground or polished vertically or at an angle, and the angles of grinding and polishing are the same during the angle grinding and polishing. When adjusting, you can choose the following ways to adjust:

[0038] a) The axial adjustment method is used to adjust the axial relative distance between the two butt end faces, which affects the gap loss of coupling transmission between optical fibers, and realizes Q-switching of fiber lasers;

[0039] b) Use the radial adjustment m...

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Abstract

The invention discloses a full optical fiber Q laser adjusting method and device in the optical fiber technological domain, which comprises the following steps: butting two optical fiber ends levelly; changing the coupling consumption among optical fibers through changing axial relative gap, radial relative position or axle relative incidence among end planes of optical fiber to change Q value of resonant cavity; adopting protective chuck structure for optical fiber to guarantee optical fiber to move stably; making optical fiber end plane vertically or display certain angle plane or sphere plane butting; coating on optical fiber end plane. The invention is convenient to operate, which improves the precision and stability of Q adjusting element for double-layered laser.

Description

technical field [0001] The invention relates to a Q-switching method and device for fiber lasers, belonging to the technical field of fiber lasers. Background technique [0002] Since its invention in 1960, laser has quickly become the main driving force for social progress and development. Compared with continuous lasers, pulsed lasers play a more important role in industrial processing, information transmission, remote sensing, and military defense. With the successful development of double-clad fiber (as shown in Figure 1(a)) and the increasing maturity of the semiconductor laser pump source, the cladding pumping technology has been continuously improved, so the Q-switched fiber laser is used as a tool to realize high-power short-pulse laser One of the effective methods has attracted widespread attention of researchers in recent years. The quality factor Q is an important parameter of the laser resonator, which is inversely proportional to the loss of the resonator, tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067H01S3/127H01S3/10G02B6/00
Inventor 巩马理闫平柳强黄磊陈刚张海涛李晨彭博
Owner TSINGHUA UNIV
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