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Multi-mode pump laser and optical fiber amplifier formed by same

A pump laser and fiber amplifier technology, applied in the field of communication, can solve the problems of EYDFA, such as large noise, low inversion degree of dopant ions, low overlap factor of pump light and fiber core, etc., to reduce noise index and work work consumption effect

Active Publication Date: 2014-04-02
GUANGXUN SCI & TECH WUHAN
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the high-power pump laser pigtails use multimode fibers. Of course, the pump light also propagates in a multimode manner. In this way, when the pump light passes through the EYDF, it needs to reflect multiple times on the inner cladding to reach the fiber core, so that the pump light The overlap factor with the fiber core is relatively low, and the dopant ion inversion degree is relatively low, resulting in excessive noise of EYDFA

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  • Multi-mode pump laser and optical fiber amplifier formed by same
  • Multi-mode pump laser and optical fiber amplifier formed by same
  • Multi-mode pump laser and optical fiber amplifier formed by same

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Embodiment Construction

[0036] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0037] The device of the invention comprises a multi-mode pumping laser tube core and a coupling lens group located in the casing, the laser tail fiber is a double-clad fiber, and a fiber Bragg grating located on the tail fiber. The signal end of the pump signal combiner uses ordinary single-mode fiber, the pump end and common end of the pump signal combiner use double-clad fiber, and the pump end of the pump signal combiner is connected to a multimode pump laser. The common end of the pump signal combiner is connected to a double-clad erbium-ytterbium co-doped fiber (EYDF).

[0038] The shorte...

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Abstract

The invention relates to a multi-mode pump laser and an optical fiber amplifier formed by the same. The multi-mode pump laser comprises a multi-mode pump laser package module (1) and an output tail fiber (2-1), wherein the output tail fiber (2-1) is a doubly clad optical fiber, the multi-mode pump laser package module (1) comprises a pump laser package shell (1-4) and a pump laser die (1-1) built in the pump laser package shell (1-4), the output tail fiber at the outer part of the pump laser package shell (1-4) is provided with an optical fiber Bragg grating (2-2), the optical fiber amplifier comprises the multi-mode pump laser and a pump signal combiner, the output tail fiber of the multi-mode pump laser is connected with the pump end of the pump signal combiner, the signal end of the pump signal combiner adopts a common single-mode optical fiber, and both the pump end and the common end of the pump signal combiner adopt a doubly clad optical fiber. Under the same pump power, the optical fiber amplifier comprising the multi-mode pump laser and the pump signal combiner disclosed by the invention has lower noise index.

Description

[0001] technical field [0002] The invention relates to a multi-mode pumping laser and an optical fiber amplifier thereof, in particular to a pumping laser and an optical fiber amplifier applied to an erbium-ytterbium co-doped double-clad optical fiber amplifier. The invention belongs to the communication field. [0003] Background technique [0004] The Er / Yb Co-doped Double Clad Fiber Amplifier uses a multimode pump laser and Er / Yb Co-doped Double Clad Fiber (EYDF Er / Yb Co-doped Double Clad Fiber), breaking through the power of the traditional Er / Yb Co-doped Fiber Amplifier (EDFA). limit. At present, the available multimode pump laser power can reach about 100W (915~975nm), and EYDF's double-clad structure and fiber core erbium-ytterbium co-doped technology can solve the problem of multimode pump absorption and single-mode signal For the problem of amplification, the two are connected by a pump signal combiner, so that one or more pump lasers can simultaneously pump a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/0941
Inventor 马延峰卜勤练何文平王琨
Owner GUANGXUN SCI & TECH WUHAN
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