High-power narrow-linewidth Raman optical fiber amplifier

A fiber amplifier and wide Raman technology, which is applied to lasers, laser components, phonon exciters, etc., can solve problems such as difficult implementation, achieve simple implementation, flexible parameter adjustment, and optimize stimulated Brillouin scattering suppression effect of effect

Inactive Publication Date: 2019-05-10
SHANGHAI PRECILASERS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods are still difficult to implement

Method used

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  • High-power narrow-linewidth Raman optical fiber amplifier
  • High-power narrow-linewidth Raman optical fiber amplifier
  • High-power narrow-linewidth Raman optical fiber amplifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1, 1178nm narrow linewidth Raman fiber amplifier

[0031] The continuous wave seed laser 11 adopts 1070nm and 1120nm dual-wavelength fiber lasers. After passing through an acousto-optic intensity modulator 12, the chopper becomes a high-frequency modulated (repetition frequency greater than 10MHz) laser, and then passes through a ytterbium-Raman hybrid fiber power amplifier. 13. Obtain a high-power 1120nm laser pump source 1. The 1120nm pump source 1 is coupled into a single-mode quartz Raman gain fiber 3 through a 1120nm / 1178nm wavelength division multiplexer 2. The 1178nm light backpropagating in the Raman gain fiber 3 is stimulated by Raman and amplified by the 1120nm laser pump, and is output through the 1120nm / 1178nm wavelength division multiplexer 2 .

Embodiment 2

[0032] Embodiment 2, 1650nm narrow linewidth Raman fiber amplifier

[0033] Diode seed source 15 adopts 1550nm single-mode laser diode, under the drive of laser driver 14, produces the laser under high-frequency modulation (repetition frequency is greater than 10MHz), passes through an erbium-doped fiber power amplifier 16 again, obtains the 1550nm laser pump of high power Pump source 1. The 1550nm pump source 1 is coupled into a single-mode quartz Raman gain fiber 3 through a 1550nm / 1650nm wavelength division multiplexer 2 . The 1650nm light backpropagating in the Raman gain fiber 3 is stimulated by Raman and amplified by the 1550nm laser pump, and is output through the 1550nm / 1650nm wavelength division multiplexer 2 .

[0034] Experiments show that the present invention does not require a special Raman gain fiber, nor does it require special treatment of the Raman gain fiber. It innovatively broadens the spectrum of the Brillouin signal through nonlinear optical effects to r...

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Abstract

The invention discloses a high-power narrow-linewidth Raman optical fiber amplifier. The amplifier is composed of a pumping source, a wavelength division multiplexer, and a Raman gain optical fiber, wherein the pumping source is a pumping source subjected to high-frequency modulation, and a modulation frequency is higher than 10 MHz; pumping laser subjected to high-frequency modulation and emittedby the pumping source is coupled into the Raman gain optical fiber through the wavelength division multiplexer; and signal light reversely propagated in the Raman gain optical fiber is output throughthe wavelength division multiplexer after being subjected to stimulated Raman amplification under the pumping of the pumping laser subjected to the high-frequency modulation. A special Raman gain optical fiber is not needed, the Raman gain optical fiber does not need to be subjected to special processing, and the spectrum of a Brillouin signal is broadened innovatively through a nonlinear opticaleffect, so that the effects of reducing Brillouin gain and inhibiting stimulated Brillouin scattering are achieved. A method is easy to implement and good in Brillouin scattering inhibition effect, and can be used with other methods to obtain a high-power narrow-linewidth Raman optical fiber amplifier output.

Description

technical field [0001] The invention relates to an optical fiber amplifier, in particular to a high-power narrow-linewidth Raman optical fiber amplifier. Background technique [0002] Fiber laser has the advantages of compact structure, high efficiency, good beam quality, stable and easy to use, etc. It is widely used in industry, national defense, medical treatment, basic research and other fields. Raman fiber laser is a special fiber laser, which uses stimulated Raman scattering in the fiber as gain. The biggest feature and advantage is that the wavelength range of the emitted laser is wide. As long as there is a pump laser with a suitable wavelength, it can Laser generation at any wavelength within the transparent range. In addition, in many high-end applications, there are not only special requirements for the wavelength of fiber lasers, but also high requirements for their spectral width, often requiring MHz or even narrower linewidths. Therefore, narrow-linewidth Ram...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/094H01S3/30
Inventor 冯衍
Owner SHANGHAI PRECILASERS TECH CO LTD
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