Multiple wavelength outputting ultra-narrow wire single frequency optical fiber laser

A fiber laser and ultra-narrow linewidth technology, applied in lasers, laser components, phonon exciters, etc., can solve problems such as difficult high power and single-frequency lasers

Active Publication Date: 2009-06-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is difficult to achieve high power (>100mW) and ultra-narrow linewidth (<2KHz) single-frequency laser output in general silica-doped optical fib

Method used

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  • Multiple wavelength outputting ultra-narrow wire single frequency optical fiber laser
  • Multiple wavelength outputting ultra-narrow wire single frequency optical fiber laser
  • Multiple wavelength outputting ultra-narrow wire single frequency optical fiber laser

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Embodiment 1

[0030] Figure 1-3 It is a schematic diagram of the principle of an ultra-narrow linewidth single-frequency fiber laser with multi-wavelength output in Embodiment 1 of the present invention. A high-gain double-clad two-dimensional array fiber 5 is used as the gain medium of the laser, and is composed of a narrow-band fiber grating array 4 and a dichromatic mirror. 6 constitute the front and rear cavity mirrors of the short F-P cavity structure, the central reflection wavelength of each narrowband fiber grating in the narrowband fiber grating array 4 is located in the gain spectrum of the laser medium, and is located in the high reflection spectrum of the dichromatic mirror 6, the reflectivity Greater than 90%. The pumping light is coupled by the pump end of the wavelength division multiplexer 3 using a single-mode LD 2 forward pumping mode ( figure 1 ), the multimode LD 8 back cladding pump is coupled via the coupling lens 7 ( figure 2 ), or the two-way pump coupling ( im...

Embodiment 2

[0034] Figure 4-6 It is a schematic diagram of the principle of a single-frequency fiber laser with multi-wavelength output in Embodiment 2 of the present invention. A high-gain double-clad two-dimensional array fiber 5 is used as the gain medium of the laser, and is composed of a narrowband fiber grating array 4 and a broadband fiber grating array 9 pairs. Front and rear cavity mirrors with a short F-P cavity structure, wherein the reflection center wavelength of each narrowband fiber grating in the narrowband fiber grating array 4 is within the reflection spectrum of each broadband fiber grating in the corresponding fiber grating array 9 . The pumping light is coupled by the pump end of the wavelength division multiplexer 3 using a single-mode LD 2 forward pumping mode ( Figure 4 ), single-mode LD 2 backward direct pumping ( Figure 5 ), or the two-way pump coupling ( Figure 6 ) into the array core in the laser cavity, its highly doped rare earth particles are reversed ...

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Abstract

The invention provides a multiple wavelength output single-frequency optical fiber laser with ultra-narrow line width, which comprises high-gain dual-cladding two-dimensional array optical fiber, narrow-band optical fiber grating arrays, a dichroscope or wide-band optical fiber grating arrays, a pump light source (single mode LD or multiple mode LD or both together), an optical fiber isolator, a coupling lens and a wavelength-division multiplexer. The single-frequency optical fiber laser can realize simultaneously output multi-path high-power (>100mW) and ultra-narrow line width (KHz level) single-frequency laser of a single-transverse mode with identical wavelength or different wavelength, and the outputted multi-path single-frequency lasers do not interfere each other. The multiple wavelength output single-frequency optical fiber laser can be applied to the military or space filed which requires high accurate sensing, detection and indication to multiple targets.

Description

technical field [0001] The invention relates to an ultra-narrow linewidth single-frequency fiber laser with multi-wavelength output. Background technique [0002] Ultra-narrow linewidth single-frequency lasers have broad application prospects in industry, agriculture, military and other fields due to their excellent coherence performance, especially in long-distance, high-precision sensing, laser ranging and indication. To improve the detection distance or accuracy of fiber laser, it is necessary to use laser with high coherence performance, so the laser is required to have a spectral width of ultra-narrow linewidth, such as a single-frequency fiber laser that requires a linewidth of KHz order. In the space or military field where multiple targets need to be detected and indicated at the same time, there is an application requirement for a single-frequency laser output at the same time with multiple wavelengths. It is difficult to achieve high power (>100mW) and ultra-na...

Claims

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Application Information

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IPC IPC(8): H01S3/067H01S3/0941
Inventor 徐善辉杨中民张伟南张勤远
Owner SOUTH CHINA UNIV OF TECH
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