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1178nm Raman Fiber Amplifier Based on Phosphorus-doped Fiber

A technology of Raman fiber and phosphorus-doped fiber, which is applied in the direction of lasers, laser components, phonon exciters, etc., can solve the problems of unfavorable integration, poor stability, low power, etc., and achieve easy power output, simple use, and high efficiency Effect

Inactive Publication Date: 2011-11-30
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Use the small gain of Yb fiber in the 1178nm band to achieve 1178nm output, but this method has disadvantages such as low power and low efficiency;
[0004] 2. 1120nm pumps germanium-doped silicon fiber, and obtains 1178nm laser output through Raman effect [see literature 2: "Multiwatts narrow linewidth fiber Raman amplifiers", Optics Express, Vol. 16, 2008, 10927~10932], but the solution is limited by the high-power 1120nm pump source
[0005] 3. BI-doped fiber laser [see Document 3: "Narrow-line, 1178nm CW bismuth-doped fiber laser with 6.4W output for direct frequency doubling", Optics Express , Vol. 15, 2007, 5473~5476], but this solution has low efficiency and low power, and the production of Bi-doped optical fiber is not yet mature
[0006] 4. Yb photonic crystal fiber amplifier [see Document 4: "167 W, power scalable ytterbium-doped photonic bandgap fiber amplifier at 1178nm", Opt Express, Vol. 18 , 2010, 16345~16352], but the pump of the device is a space-coupled structure, which has poor stability and is not conducive to integration

Method used

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  • 1178nm Raman Fiber Amplifier Based on Phosphorus-doped Fiber
  • 1178nm Raman Fiber Amplifier Based on Phosphorus-doped Fiber
  • 1178nm Raman Fiber Amplifier Based on Phosphorus-doped Fiber

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Effect test

Embodiment 1

[0025] The phosphor-doped optical fiber 4 is an optical fiber 50m with a Raman frequency shift peak of 40 THz as a Raman gain medium.

[0026] The central wavelength of the pump source 6 is between 1015nm and 1020nm.

[0027] The phosphorus-doped Raman fiber 4 is used as a Raman gain medium, combined with the seed source 1 and the pump source 6 to form a Raman fiber amplifier. The seed light output by the seed source 1 passes through the isolator 2, enters the phosphorus-doped Raman fiber 4 through the first wavelength division multiplexer 3, and then outputs through the second wavelength division multiplexer 5, and the pumping light source 6 emits The laser light is coupled into the phosphorus-doped Raman fiber 4 through the second wavelength division multiplexer 5, so that the seed light is amplified, and the 1178nm Raman laser is output by the third port of the second wavelength division multiplexer 5, The isolator 2 mainly isolates reverse light and protects the seed sour...

Embodiment 2

[0030] Experiments show that the present invention utilizes the 40THz Raman frequency shift peak of the phosphorus-doped optical fiber, and under the action of a 1015nm-1020nm pump source, the 1178nm laser can be obtained by one Raman effect. The high-power 1018nm pump source is near the emission peak of Yb ions, and it is easy to obtain high-power output. Under the action of a pump source with a central wavelength of 1015nm-1020nm, a high-power 1178nm laser output can be achieved.

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Abstract

A 1178nm Raman fiber amplifier based on phosphorus-doped optical fiber, which is characterized in that: a seed source suitable for 1178nm wave band, an isolator, a first wavelength division multiplexer, a phosphorus-doped optical fiber, and a second wavelength division multiplexer are sequentially fused in series with optical fibers. Composed of a device and a pump source, the phosphor-doped fiber is used as a Raman gain medium, using its Raman frequency shift at 1330cm-1, combined with a seed source in the 1178nm band, under the action of a 1015nm-1020nm pump source, a 1178nm Raman Mann laser output. The invention has the characteristics of all optical fibers and easy integration, outputs high-power, high-polarization single-mode 1178nm band laser, and can generate 589nm sodium yellow light through frequency doubling.

Description

technical field [0001] The invention relates to a Raman fiber amplifier, in particular to a 1178nm Raman fiber amplifier based on phosphorus-doped fiber. Background technique [0002] Sodium yellow light has extremely important applications in the fields of medicine, astronomy, and military affairs, such as adaptive optics, laser guide stars, etc. Obtaining 589nm sodium yellow light by frequency doubling 1178nm laser is an important technical approach. There are several ways to obtain 1178nm laser output: [0003] 1. Direct pumping of Yb fiber lasers [see Literature 1: "Multi-watts narrow-linewidth all fiber Yb-doped laser operating at 1179 nm," Optics Express, Vol. 18, 2010, 5920~5925]. Use the small gain of Yb fiber in the 1178nm band to achieve 1178nm output, but this method has disadvantages such as low power and low efficiency; [0004] 2. Pump germanium-doped silicon fiber at 1120nm, and obtain 1178nm laser output through Raman effect [see Document 2: "Multiwatts na...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/16H01S3/30H01S3/094
Inventor 王建华张磊冯衍
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI