Single-frequency Raman optical fiber laser device system

A technology of fiber laser and Raman fiber, which is applied in the direction of lasers, laser components, phonon exciters, etc., can solve the problems of system complexity and reduce system stability, so as to simplify the system, improve energy utilization efficiency, and improve The effect of stability

Active Publication Date: 2013-08-28
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

The distributed feedback semiconductor laser used in this system needs a coupling system to introduce its output light into the optical fiber, and the required power supply and temperature control, etc., complicate the system to a certain extent and reduce the stability of the system.

Method used

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  • Single-frequency Raman optical fiber laser device system
  • Single-frequency Raman optical fiber laser device system

Examples

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Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 The system outputs 1178nm single-frequency linearly polarized laser:

[0029] Single longitudinal mode Raman fiber laser 1 uses the same quartz-matrix polarization-maintaining Raman gain fiber as Raman amplifying gain fiber 2, which is a distributed feedback Raman fiber laser with π phase shift. The rest of the pumping light from the pumping light source 4 obtains 1178nm single-frequency linearly polarized laser light. The peak value of the Raman gain spectrum of the quartz-matrix polarization-maintaining Raman gain fiber corresponds to about 13.4THz, and the calculated wavelength of the pump light is 1120nm. Therefore, the pump light source 4 selects a linearly polarized ytterbium-doped fiber laser with a center wavelength of 1120nm. The multiplexer 3 is a polarization-maintaining wavelength division multiplexer with a wavelength of 1120nm / 1178nm. The Raman amplification gain fiber 2 suppresses the stimulated Brillouin scattering accompanying the 1178nm lase...

Embodiment 2

[0030] Embodiment 2. System design output 1270nm single-frequency linearly polarized laser:

[0031] Single longitudinal mode Raman fiber laser 1 uses the same quartz matrix polarization-maintaining Raman gain fiber as Raman amplifying gain fiber 2, which is a distributed Bragg reflector Raman fiber laser. The pump light of Puyuan 4 obtains 1270nm single-frequency linearly polarized laser light. The peak value of the Raman gain spectrum of the quartz-matrix polarization-maintaining Raman gain fiber corresponds to about 13.4THz, and the calculated wavelength of the pump light is 1120nm. The pump source 4 is a non-polarization-maintaining all-fiber Raman fiber laser with a center wavelength of 1200nm. The wavelength division multiplexer 3 selects a polarization-maintaining wavelength division multiplexer with a wavelength of 1200nm / 1270nm. The 1200nm pump light provided by the pump source 4 amplifies the 1270nm single-frequency laser light generated by the single longitudinal m...

Embodiment 3

[0032] Embodiment 3 The system outputs a 2.35 μm single-frequency laser with no requirement on the polarization state:

[0033] Single longitudinal mode Raman fiber laser 1 uses the same tellurite matrix non-polarization-maintaining Raman gain fiber as Raman amplifying gain fiber 2, which is a Raman fiber laser with distributed Bragg reflectors. The pump light from the pump light source 4 obtains 2.35 μm single-frequency laser light. The Raman gain spectrum peak of tellurate matrix non-PM Raman gain fiber corresponds to about 750cm -1 Wavenumber, the pump light wavelength is calculated to be 2 μm, so the pump light source 4 uses a non-polarization-maintaining thulium-doped fiber laser with a center wavelength of 2 μm, and the wavelength division multiplexer 3 uses a non-polarization-maintaining WDM laser with a wavelength of 2 μm / 2.35 μm multiplexer. The Raman amplification gain fiber 2 suppresses the stimulated Brillouin scattering accompanying the 2.35 μm laser amplificati...

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Abstract

A single-frequency Raman optical fiber laser device system is composed of a single longitudinal mode Raman optical fiber laser device, a Raman amplification gain optical fiber, a wavelength division multiplexer and a pumping source of optical fiber output. Due to the flexible characteristic of the wavelength of a stimulated Raman scattering effect, by the adoption of the same structure and by means of change of the center wave length of the pumping source, high-power single-frequency laser output with a broad wave band can be achieved. The single-frequency Raman optical fiber laser device system has the advantages of being compact in structure, convenient to integrate, and applicable to multiple fields.

Description

technical field [0001] The invention relates to a fiber laser and a fiber amplifier, in particular to a single-frequency Raman fiber laser system. Background technique [0002] Fiber lasers have the characteristics of high conversion efficiency, good beam quality, convenient thermal management, and compact structure. In recent years, fiber lasers have gradually become a research hotspot in the field of laser technology. With its extremely narrow linewidth and extremely long coherence length, single-frequency lasers have broad application prospects in optical communication, fiber optic sensing, and scientific research. The Raman fiber laser provides the gain required for laser generation and amplification through the stimulated Raman scattering effect. Due to the wavelength flexibility of the stimulated Raman scattering effect, it can be realized by changing the central wavelength of the pump light with the same structure. Wide-band laser output, and can realize laser in the...

Claims

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Application Information

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IPC IPC(8): H01S3/067H01S3/091
Inventor 胡金萌冯衍
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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