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Side-by-side side-pump coupler and preparation method thereof

A coupler and side pumping technology, applied in the field of optical fiber devices, can solve the problems of difficult post-processing stripping, large pump coupling loss, cumbersome manufacturing process, etc., and achieve outstanding substantive features, small coupling loss, and power expansion. good effect

Active Publication Date: 2017-02-01
INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application number is CN2010101103239.3, the authorized announcement number is 101777723 B, the name is high-power optical fiber side pump coupler and its manufacturing method, the application number is CN201110422410.1, the Chinese patent name is optical fiber combiner and its manufacturing method and The patent number is US5999673, and the US patent titled a coupling structure for realizing pumping between the multimode pump light and the gain fiber proposes a method for making a side pump coupler, among which: CN2010101103239.3 and US5999673 patents need to first The pump fiber is subjected to pretreatment such as tapering, and then wound on the side of the inner cladding of the double-clad gain fiber and fused together. This method has a complicated manufacturing process, and the pump coupling loss is large; The glass rod and the passive optical fiber stripping rod are combined together in the axial direction to form a composite preform, and then the preform is drawn to form a side-pumped coupler. This method has high production efficiency and the coupling efficiency of the manufactured coupler is high. However, Since the coupling interface between the gain fiber and the pump fiber in the special fiber formed after the composite preform is drawn is in a physically fused state, the post-processing and stripping link in the production of high-power fiber lasers is very difficult, which is the existing technology. Inadequacies

Method used

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  • Side-by-side side-pump coupler and preparation method thereof
  • Side-by-side side-pump coupler and preparation method thereof
  • Side-by-side side-pump coupler and preparation method thereof

Examples

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Embodiment 1

[0033] exist figure 1 Among them, the side-by-side pumping coupler of the present invention includes a pumping fiber 1 , a gain fiber inner cladding 2 , a gain fiber core 3 , an inner cladding 4 , a protective coating 5 and a strippable marker 6 . Wherein, the gain fiber core 3 is arranged in the inner cladding 2 of the gain fiber, the pumping fiber 1 and the inner cladding 2 of the gain fiber are arranged side by side in parallel, and the outer cladding 4 covers the periphery of the pumping fiber 1 and the inner cladding 2 of the gain fiber, The protective coating 5 is covered on the periphery of the outer cladding 4, and the strippable mark 6 is arranged on the top of the protective coating 5 in the strippable region of the pump coupler, as a strippable mark for the pumping fiber 1 and the inner cladding 2 of the gain fiber; The area where the optical fiber inner cladding 2 and the pumping optical fiber 1 contact each other forms a coupling area. During operation, the pumpi...

Embodiment 2

[0045] Such as Figure 7 As shown, the basic structure and preparation method of the shoulder-by-shoulder side-pump coupler in this embodiment are the same as those in Example 1. There are 3 special optical fibers with 3 strippable marks 6 at both ends and the middle, and the outer protective coating 5 and outer cladding 4 at the two ends and the middle section of the special optical fiber in the strippable area are removed, and the two ends and the middle section of the special optical fiber are The bare pump fiber 1 in the strippable area is stripped from the gain fiber inner cladding 2, and the pump fiber 1 in the middle section is cut from the middle position, and then the pump fiber 1 and the gain fiber inner cladding 2 after stripping are separated. A layer of outer cladding coating is evenly coated on the outside, which constitutes a side-by-side pump coupler with a length of about 30m, a pump fiber arranged side by side with the inner cladding of the gain fiber, and 4 ...

Embodiment 3

[0047] Such as Figure 8 As shown, the basic structure and preparation method of the side-by-side pump coupler in this embodiment are the same as those in Example 1, the difference is that the side-by-side pump coupler is prefabricated with two pump fibers The number of pump fibers 1 arranged side by side with the gain fiber inner cladding 2 in the side-by-side pump coupler obtained after preparation is two.

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Abstract

The invention provides a side-by-side side pump coupler and a preparation method thereof. The side-by-side side pump coupler can overcome the shortcoming of large coupling loss or high post-treatment stripping difficulty of a pump coupler in the prior art. The pump coupler can provide a high-power and low-loss pump, has the advantages of simple structure, small coupling loss, fine power expansibility, convenience in heat management and the like, and can be applied to developing a high-power fiber laser system.

Description

technical field [0001] The invention relates to the technical field of optical fiber devices, in particular to a side-by-side side-pump coupler and a preparation method thereof. Background technique [0002] In the prior art, the well-known technology is: fiber laser has outstanding advantages such as small size, excellent beam quality, stable and reliable work, and strong environmental adaptability. Broad application prospects have become the fastest growing and most dynamic field of laser technology today. [0003] The pump coupler is the core device of the fiber laser. It is mainly divided into two types: the end-pump coupler and the side-pump coupler in terms of the pump coupling method. However, the side-pumped coupler used in thousands of watts or even higher power fiber lasers needs to solve the two problems of increasing the total pumping power and reducing the gain of the fiber core and the insertion loss of the pumping fiber. key technical issues. [0004] Resea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/094G02B6/28
Inventor 张凯马毅唐淳孙殷宏李腾龙吴娟王岩山关有光
Owner INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
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