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Large effective mode field area single mode amplifier with exposure region in active quartz rod

A technology of exposure area and mode field area, which is applied in optics, instruments, cladding optical fibers, etc., can solve the problem of single-mode and high magnification of optical fiber amplifiers, and achieve the reduction of maximum unit volume power and large optical amplification The effect of magnification and loss reduction

Inactive Publication Date: 2012-05-30
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem that the existing optical fiber amplifiers cannot have both single-mode and high magnification, the present invention provides a single-mode amplifier with a large effective mode field area and an exposure area in the active quartz rod

Method used

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  • Large effective mode field area single mode amplifier with exposure region in active quartz rod
  • Large effective mode field area single mode amplifier with exposure region in active quartz rod
  • Large effective mode field area single mode amplifier with exposure region in active quartz rod

Examples

Experimental program
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Effect test

Embodiment approach 1

[0014] Embodiment 1, a single-mode amplifier with a large effective mode field area with an exposure area in an active quartz rod, such as figure 1 , 2 , the amplifier includes: an active quartz rod and a pumping source 4 . The structure of the active quartz rod is the exposure area 1, the active quartz rod core 2 and the outer cladding 3 in sequence from the inside to the outside. The exposure area 1 is located at the center of the active quartz rod, and the refractive index of the exposure area 1, the active quartz rod core 2 and the outer cladding layer 3 decrease gradually.

[0015] The signal light source inputs the signal light to be amplified from the right end, and uses the pumping source 4 for pumping at the right end.

[0016] The refractive index of the exposed area 1 is 1.459, and the radius of the exposed area 1 is 2.5 microns.

[0017] The refractive index of the active quartz rod core 2 is 1.455, and the radius of the active quartz rod core 2 is 5 mm. The re...

Embodiment approach 2

[0018] Embodiment 2, a large effective mode field area single-mode amplifier with an exposure area in an active quartz rod, such as image 3 , the amplifier includes: an active quartz rod and a pumping source 4 . The structure of the active quartz rod is the exposure area 1, the active quartz rod core 2 and the outer cladding 3 in sequence from the inside to the outside. The exposure area 1 is located at the center of the active quartz rod, and the refractive index of the exposure area 1, the active quartz rod core 2 and the outer cladding layer 3 decrease gradually.

[0019] The signal light source inputs the signal light to be amplified from the right end, and uses the pumping source 4 for side pumping.

[0020] The refractive index of the exposed area 1 is 1.457, and the radius of the exposed area 1 is 5 microns.

[0021] The refractive index of the active quartz rod core 2 is 1.454, and the radius of the active quartz rod core 2 is 50 mm. The refractive index of the out...

Embodiment approach 3

[0022] Embodiment 3, a single-mode amplifier with a large effective mode field area with an exposure area in an active quartz rod, such as Figure 4 , the amplifier includes: an active quartz rod and a pumping source 4 . The structure of the active quartz rod is the exposure area 1, the active quartz rod core 2 and the outer cladding 3 in sequence from the inside to the outside. The exposure area 1 is located at the center of the active quartz rod, and the refractive index of the exposure area 1, the active quartz rod core 2 and the outer cladding layer 3 decrease gradually.

[0023] The signal light source inputs the signal light to be amplified from the right end, uses the pumping source 41 for right end pumping, and uses the pumping source 42 for side pumping.

[0024] The refractive index of the exposed area 1 is 1.456, and the radius of the exposed area 1 is 10 microns.

[0025] The refractive index of the active quartz rod core 2 is 1.453, and the radius of the active ...

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Abstract

The invention discloses a large effective mode field area single mode amplifier with an exposure region in an active quartz rod. The invention overcomes the defect that the existing amplifier can not simultaneously implement single mode and high amplifying factor. The amplifier comprises an active quartz rod and a pumping source, wherein the active quartz rod is sequentially composed of an exposure region (1), an active quartz rod core (2) and an external cover layer (3) from inside to outside; the exposure region (1) is positioned at the center of the active quartz rod; and the refractive indexes of the exposure region (1), the active quartz rod core (2) and the external cover layer (3) decrease progressively. Signal light is input from one end of the active quartz rod and pumped by using the end face or side face of the pumping source (4). The amplifier can not easily generate nonlinear effect, so that the total amplifying factor linearly increases as the sectional area of the active quartz rod increases, thereby implementing simultaneous increase of the single mode and high magnification limit in deed.

Description

technical field [0001] The invention relates to a single-mode amplifier with a large effective mode field, in particular to a single-mode amplifier structure which realizes high-power amplification by changing the refractive index distribution of a quartz rod by an external exposure method, and is suitable for optical fiber communication and other optical signal amplification fields. Background technique [0002] Since the advent of optical fiber amplifiers, it has been widely recognized for its excellent signal amplification and transparency of the optical path. With the development of technology, the magnification of optical fiber amplifiers is increasing. High-magnification optical fiber amplifiers are widely used in optical fiber communications, national defense and sensing. The application in fields such as fiber optic amplifiers has attracted people's attention day by day, and its wide range of application fields has made people invest more and more in optical fiber amp...

Claims

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Application Information

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IPC IPC(8): G02F1/39G02B6/02
Inventor 温晓东宁提纲王春灿裴丽李晶周倩郑晶晶
Owner BEIJING JIAOTONG UNIV
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