Passive-phase-locked fiber ring laser

A fiber laser and phase locking technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problems of difficult production of fiber couplers, complex structure, difficult to effectively improve the output power, etc., to achieve simple structure, light beam The effect of good quality and high output power

Inactive Publication Date: 2013-04-03
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, as far as the current implementation methods of passive phase locking are concerned, the frequency bandwidth of the output laser, and the continued increase in the number of optical paths will greatly increase the complexity of the entire system, so it is difficult to effectively increase the output power; more fiber couplers are required. However, such a fiber coupler is very difficult to manufacture and has a complex structure.

Method used

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  • Passive-phase-locked fiber ring laser
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  • Passive-phase-locked fiber ring laser

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0033] Implementation Mode 1 (N)

[0034] Ring-cavity passively phase-locked fiber lasers such as figure 1 , 2 As shown, the laser includes first to Nth active single-mode optical fibers 11, 12, 13, 14, 15, ..., 1N, first to Nth wavelength division multiplexers, first to Nth single-mode optical fibers 31, 32, 33, 34, 35, ..., 3N, first to Nth fiber gratings 41, 42, 43, 44, 45, ..., 4N, first to Nth pumping sources 51, 52, 53 , 54, 55, ..., 5N and the first to Nth couplers.

[0035] The first port 211 of the first wavelength division multiplexer is connected with the first pump source 51, the second port 212 of the first wavelength division multiplexer is connected with an end of the first fiber grating 41, the first wavelength division multiplexer The third port 213 of the first active single-mode fiber 11 is connected to one end, the other end of the first active single-mode fiber 11 is connected to the first port 611 of the first coupler, and the second port 612 of the fi...

Embodiment approach 2

[0044] Embodiment 2 (N=3)

[0045] Ring-cavity passively phase-locked fiber lasers such as image 3 , 4 As shown, the laser includes first to third active single-mode fibers 11, 12, 13, first to third wavelength division multiplexers, first to third single-mode fibers 31, 32, 33, first to third Third fiber gratings 41, 42, 43, first to third pumping sources 51, 52, 53 and first to third couplers.

[0046] The first port 211 of the first wavelength division multiplexer is connected with the first pump source 51, the second port 212 of the first wavelength division multiplexer is connected with an end of the first fiber grating 41, the first wavelength division multiplexer The third port 213 of the first active single-mode fiber 11 is connected to one end, the other end of the first active single-mode fiber 11 is connected to the first port 611 of the first coupler, and the second port 612 of the first coupler It is connected to one end of the second fiber grating 42 , and th...

Embodiment approach 3

[0051] Embodiment 3 (N=4)

[0052] Ring-cavity passively phase-locked fiber lasers such as Figure 5 , 6 As shown, the laser includes first to fourth active single-mode fibers 11, 12, 13, 14, first to fourth wavelength division multiplexers, first to fourth single-mode fibers 31, 32, 33, 34 , first to fourth fiber gratings 41, 42, 43, 44, first to fourth pumping sources 51, 52, 53, 54 and first to fourth couplers.

[0053] The first port 211 of the first wavelength division multiplexer is connected with the first pump source 51, the second port 212 of the first wavelength division multiplexer is connected with an end of the first fiber grating 41, the first wavelength division multiplexer The third port 213 of the first active single-mode fiber 11 is connected to one end, the other end of the first active single-mode fiber 11 is connected to the first port 611 of the first coupler, and the second port 612 of the first coupler It is connected to one end of the fourth fiber g...

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Abstract

The invention discloses a passive-phase-locked fiber ring laser, which relates to a fiber laser and overcomes the shortcomings of wideband output laser, system complexity and low output power of the conventional laser. N wavelength division multiplexers and N couplers of the laser are distributed on a ring at intervals, and are connected by N fiber Bragg gratings and N active single mode fibers. N pump sources are connected with the N wavelength division multiplexers respectively. One ends of the N single mode fibers are connected with the N couplers respectively, and the other end faces of the N single mode fibers are positioned in the same plane, and are arranged into a line, a hexagon, a rectangle or a triangle. The pump sources input pump energy into the active single mode fibers through the wavelength division multiplexers, generated laser signals are output by the single mode fibers connected with the couplers, and a plurality of paths of laser are coherently synthesized, so that narrow frequency spectrum and high power are ensured. The passive-phase-locked fiber ring laser is applied in the fields of industrial machining and national defense.

Description

technical field [0001] The invention relates to a fiber laser, which is suitable for fields requiring high laser output power and good beam quality, such as industrial cutting and military affairs. Background technique [0002] Lasers have attracted widespread attention since their inception, and research on high-power lasers has progressed rapidly in recent years. At present, high-power fiber lasers are widely used in industrial fields such as precision welding and cutting, and show broad application prospects in the military field. In recent years, the output power of fiber lasers has increased rapidly, and various methods for increasing laser output power have been proposed. [0003] First of all, fiber lasers based on cladding pumping technology have attracted widespread attention due to their good beam quality, high conversion efficiency, and compact structure. In 2004, the single-fiber output power of fiber lasers reached the kilowatt level. In 2009, IPG reported tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067H01S3/098H01S3/10
Inventor 温晓东宁提纲裴丽李晶周倩彭磊刘超康泽新
Owner BEIJING JIAOTONG UNIV
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