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'8' character cavity passive mode-locking pulse optical fibre laser

A fiber laser, passive mode-locking technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problems of mode-locked pulsed fiber lasers, large fluctuations in pulse energy and high cost, and achieve guaranteed switching effect, pulse energy Small fluctuation and low cost effect

Inactive Publication Date: 2007-02-07
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0010] The object of the present invention is to provide a passive mode-locked pulsed fiber laser with an "8" cavity, which solves the problem of large fluctuations in pulse energy after mode-locking in the background technology, high cost and the traditional nonlinear optical ring using a 3dB central coupler. The technical problem that the mirror cannot be used in the "8" cavity mode-locked pulsed fiber laser

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  • '8' character cavity passive mode-locking pulse optical fibre laser
  • '8' character cavity passive mode-locking pulse optical fibre laser
  • '8' character cavity passive mode-locking pulse optical fibre laser

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Embodiment Construction

[0033] see image 3 , the present invention is an oscillating cavity formed by sequentially connecting an ytterbium-doped optical fiber 12 , an optical isolator 11 , a coupler 10 , a nonlinear optical loop mirror 3 and a polarization controller 7 through a single-mode optical fiber 8 . The nonlinear optical loop mirror 3 is composed of a central coupler 1 and a coupler 9 connected by a single-mode optical fiber 2 to form a cavity.

[0034] The pump laser light emitted by the pump source 6 is coupled into the oscillation cavity through the wavelength division multiplexer 5 . The central coupler 1 of the present invention can be a 3dB coupler. The nonlinear optical loop mirror 3 can only use the single-mode fiber 2, or can be composed of a section of high-dispersion single-mode fiber 2 and a section of dispersion-shifted fiber 4 with lower dispersion. For dispersion unbalanced optical ring mirror fiber laser pulse laser enters from one end of the central coupler 1 and is divid...

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Abstract

The invention relates to an 8-shaped passive lock mode impulse fiber laser, wherein another end of central coupler is connected to the polarization controller, the wavelength division multiplexer, the yttrium doping fiber, the light separator and the coupler, to form chamber; the non-linear light annular mirror is formed by connected single-mode fiber and coupler to form chamber; the couple input of wavelength division multiplexer has pump source. The invention has low impulse energy fluctuation and low cost. And the coupler is asymmetry arranged near the central coupler; and the annular mirror uses same fibers; the light transmitted reversed has different density after coupler to the light not passing coupler, and the non-linear phase shifts are different; and lights transmitted with same direction have same density when interfered in central coupler, therefore, the lock-mode effect is better.

Description

technical field [0001] The invention proposes a scheme of a nonlinear optical ring mirror, relates to a mode-locked pulsed fiber laser, in particular to a passive mode-locked pulsed fiber laser with an "8" cavity. Background technique [0002] Fiber lasers have been widely researched and applied due to their small size, high light-to-light conversion efficiency, good stability and many other advantages, especially Er-doped lasers. 3+ Fiber lasers and amplifiers are mostly used. Fiber lasers can be F-P cavity, ring cavity and "8" cavity, etc. [0003] The "8" cavity mode-locked pulsed fiber laser has two basic structures: nonlinear amplifying loop mirror (NALM) mode-locked pulsed fiber laser and nonlinear optical loop mirror (NOLM) mode-locked pulsed fiber laser. In the traditional "NOLM" mode-locked pulsed fiber laser, the central coupler (Central coupler) adopts a non-3dB coupler, and its optical fiber is the same type of optical fiber or optical fiber with basically the ...

Claims

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Application Information

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IPC IPC(8): H01S3/00H01S3/067H01S3/08H01S3/098G02B6/00
Inventor 张伟赵卫陈国夫马海全王屹山刘畅李喆侯洵
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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