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1.6-micron wave band pulse type single-frequency linear polarization laser

A laser and linear polarization technology, which is applied in the field of 1.6μm-band pulsed single-frequency linear polarization lasers, can solve the problems of difficult to further increase the output single pulse energy, limited fiber nonlinear effects, etc., so as to avoid nonlinear effects and be easy to control , High stability effect

Inactive Publication Date: 2014-08-27
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

Fiber lasers based on the main oscillation-power amplification structure have the characteristics of small size, simple structure, high stability, and good heat dissipation, but limited by the nonlinear effect in the fiber, it is difficult to further increase the output single pulse energy

Method used

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  • 1.6-micron wave band pulse type single-frequency linear polarization laser
  • 1.6-micron wave band pulse type single-frequency linear polarization laser
  • 1.6-micron wave band pulse type single-frequency linear polarization laser

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specific Embodiment

[0023] The seed source laser 1 selects a linearly polarized DFB laser with a center wavelength of 1645nm and a pigtail output. After the seed isolator 2, the beam splitter 3 separates part of the light as the local oscillator light in coherent detection, and the rest of the seed light is used as the signal light. It is coupled into a polarization-maintaining Raman gain fiber 42 in a quartz matrix through a wavelength division multiplexer 41 . 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 1532nm. Therefore, the first pump source 44 is selected as the center wavelength of 1532nm, and the repetition rate and pulse width are adjustable. 1. The polarization-maintaining erbium-ytterbium co-doped pulsed fiber laser with linear polarization output is pumped back through the pump beam combiner 43 . The polarization maintaining Raman gain fiber 42 s...

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Abstract

The invention relates to a 1.6-micron wave band pulse type single-frequency linear polarization laser which is characterized by comprising a seed resource laser, a seed isolator, a beam splitter, a raman optical fiber amplifier, an amplification stage isolator, a collimator, a coupling system and a solid laser amplifier which are connected in sequence. The laser has no complex control system and has the advantages of being compact in structure, high in stability and repetition frequency, adjustable in pulse width and the like.

Description

technical field [0001] The invention relates to a single-frequency linearly polarized laser, in particular to a 1.6 μm band pulse type single-frequency linearly polarized laser applied to a coherent laser radar. Background technique [0002] Due to the advantages of long coherence length, narrow spectral line width, and good beam quality, single-frequency pulsed lasers have important application prospects in remote sensing technology, coherent lidar detection, and coherent optical communication. In these fields, the laser line width is often required to be below 10MHz, and there are also different requirements for the pulse repetition frequency. The main methods to achieve 1.5-1.6 μm single-frequency laser output include optical parametric oscillators, solid-state lasers and fiber lasers. Seed injection into 1.5μm band optical parametric oscillator and seed injection into 1.6μm band erbium-doped solid-state laser can obtain high single-pulse laser energy. The pulse width is...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/30H01S3/23
Inventor 陈卫标于真真王明建侯霞
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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