Single-mode fiber laser with mini resonance cavity structure

A resonant cavity, single-mode fiber technology, applied in the field of single-mode fiber lasers, can solve the problems of difficulty in increasing power, complex structure of fiber lasers, and insufficient laser characteristics to achieve non-linearity, compact structure, and easy control. Effect

Inactive Publication Date: 2012-06-27
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome that the structure of the current fiber laser is too complicated, or the power is difficult to increase, or the characteristics of the laser cannot meet the requirements.

Method used

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  • Single-mode fiber laser with mini resonance cavity structure
  • Single-mode fiber laser with mini resonance cavity structure
  • Single-mode fiber laser with mini resonance cavity structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0020] Embodiment 1, a single-mode fiber laser with a micro-resonator structure, see figure 1 , the laser includes: an optical fiber, a first grating 31 , a second grating 32 and a pumping source 5 . A micro-resonant cavity 4 is arranged in the optical fiber. The shape of the micro-resonant cavity 4 is a ring and two tangent lines tangent to the ring, located at the junction of the cladding and the fiber core, and living between the first grating 31 and the second Between the gratings 32, the tangent on the left side passes through the first grating 31; the pumping source 5 pumps the end face of the optical fiber.

[0021] Wherein the micro-resonant cavity 4 is formed by exposing the optical fiber with a femtosecond laser, and the refractive index of the exposed place is higher than that of the surrounding medium.

[0022] The parameters of each part are: the radius of the core 1 is 2 microns; the thickness of the cladding 2 is 58.5 microns; the fiber grating 31 is totally re...

Embodiment approach 2

[0023] Embodiment 2, a single-mode fiber laser with a micro-resonator structure, see figure 2 , the laser includes: an optical fiber, a first grating 31 , a second grating 32 and a pumping source 5 .

[0024] A micro-resonant cavity 4 is arranged in the optical fiber. The shape of the micro-resonant cavity 4 is a ring and a tangent to the ring, located at the junction of the cladding and the core, and between the first grating 31 and the second grating. 32, the tangent passes through the first grating 31; the pumping source 5 pumps the end face of the optical fiber.

[0025] Wherein the micro-resonant cavity 4 is formed by exposing the optical fiber with an ultraviolet laser, and the refractive index of the exposed place is higher than that of the surrounding medium.

[0026] The parameters of each part are: the radius of the core 1 is 5 microns; the thickness of the cladding 2 is 57.5 microns; the fiber grating 31 is totally reflective to the light waves with a wavelength o...

Embodiment approach 3

[0027] Embodiment 3, a single-mode fiber laser with a micro-resonator structure, see image 3 , the laser includes: an optical fiber, a first grating 31 , a second grating 32 and a pumping source 5 .

[0028] A micro-resonant cavity 4 is arranged in the optical fiber, the shape of the micro-resonant cavity 4 is a ring and two tangents tangent to the ring, located in the fiber core, and between the first grating 31 and the second grating 32, The tangent on the left side passes through the first grating 31; the pumping source 5 pumps the end face of the optical fiber.

[0029] Wherein the micro-resonant cavity 4 is formed by exposing the optical fiber with a femtosecond laser, and the refractive index of the exposed place is higher than that of the surrounding medium.

[0030] The parameters of each part are: the radius of the core 1 is 8 microns; the thickness of the cladding 2 is 54.5 microns; the fiber grating 31 is totally reflective to the light waves with a wavelength of ...

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Abstract

The invention discloses a single-mode fiber laser with a mini resonance cavity structure, and relates to the fields of fiber-optical communication and high power and high light beam quality requirements. The invention aims to solve the problem that the structure is too complicated, or the power is difficult to increase, or laser characteristics cannot meet the requirement in the conventional fiber laser. The laser comprises an optical fiber, an optical grating and a pumping source. A mini resonance cavity (4) is arranged in the optical fiber, has a shape of a ring and tangent lines tangent with the ring, or a rectangle, and is positioned in the fiber core or a joint of a cladding and the fiber core. In the process of manufacturing the mini resonance cavity, the optical fiber is exposed byan ultraviolet laser or a femtosecond laser, the refractive index on the exposure part is higher that that of a peripheral medium, and the structure of the mini resonance cavity (4) is formed. The single-mode fiber laser is mainly used for fiber-optical communication and industrial processing.

Description

technical field [0001] The invention relates to a single-mode fiber laser. It is especially suitable for high-quality light fields with high-quality requirements for optical frequency bandwidth or high power. Background technique [0002] Since the advent of laser, its good coherence characteristics have been widely recognized. With the development of optical communication technology, there are better requirements for the quality of lasers. With the wide application of modern networks, people have higher and higher requirements on the capacity and speed of communication networks, and the quality of signal laser sources has become a crucial factor for large-capacity optical communications. [0003] At present, many research and development teams are conducting research on laser performance, and have achieved considerable results. The development of lasers is nothing more than two aspects, one is high power, which is mainly used in industrial cutting, military and other fiel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067
Inventor 宁提纲温晓东裴丽李晶周倩郑晶晶冯素春
Owner BEIJING JIAOTONG UNIV
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