Wave length tunable narrow wire width, high signal noise ratio single polarization ring cavity full optical fiber laser

A high signal-to-noise ratio, laser technology, applied in lasers, laser components, phonon exciters, etc., can solve problems such as ring cavity all-fiber lasers that have not yet been seen

Inactive Publication Date: 2004-12-22
NANKAI UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The search results show that there is no single-polarized ring-cavity all-fiber laser with tunable wavelength, narrow linewidth, and high signal-to-noise ratio.

Method used

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  • Wave length tunable narrow wire width, high signal noise ratio single polarization ring cavity full optical fiber laser
  • Wave length tunable narrow wire width, high signal noise ratio single polarization ring cavity full optical fiber laser
  • Wave length tunable narrow wire width, high signal noise ratio single polarization ring cavity full optical fiber laser

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Embodiment

[0022] Wavelength tunable, narrow linewidth, high signal-to-noise ratio single-polarization ring-cavity all-fiber laser structure such as figure 1 . The 980nm LD1 laser with pigtail output is incident into the erbium-doped fiber EDF3 through the 980 / 1550nm wavelength division multiplexer WDM2, and the other end is connected to the fiber isolator PI-ISO4, the fiber polarizer PR6 and the 30:70 fiber coupler Coupler7 One end of the cavity, the other end of the cavity is connected to the fiber isolator PI-ISO5, and the other end of the fiber isolator 5 is connected to the 980 / 1550nm wavelength division multiplexer WDM2, and finally the ring cavity structure is completed. Of the two ports outside the cavity of the fiber coupler, 70% are terminated with a Bragg fiber grating 8 to provide intracavity laser feedback, and the other end (30% end) of the fiber coupler provides laser output.

[0023] In this ring cavity all-fiber laser, the 980nm LD laser is used as the pump light source...

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Abstract

The invention relates to a full fiber laser, especially relates to a ring cavity full fiber laser with a adjustable wavelength, narrow line width, high signal-to-noise ratio and single-polarization output character, which can be uses as light source, widely applied to fiber communication and fiber sensing technology field. The laser mainly includes: semiconductor laser, wave division duplexer, the outputted laser is emitted to the erbium-doped fiber through the wave division duplexer, then it is transmitted to the fiber isolator, fiber polarization device, and it is connected to one port in the coupler cavity, another port is connected to the fiber isolating device, and connected to the wave division duplexer through another port of the fiber isolator, forms a ring cavity structure; out of the fiber coupler, one port is connected to the Bragg fiber gratings, the other port is connected to the output ports of the laser. The invention can acquire laser output with narrow line width, single-polarization laser, the line width can be less than 1GHz, and namely, the line width at 1550nm waveband is less than 0.008nm.

Description

technical field [0001] The invention relates to an all-fiber laser, in particular to a ring-cavity all-fiber laser with the characteristics of tunable wavelength, narrow linewidth, and high signal-to-noise ratio single polarization output, which can be used as an ideal light source for an optical fiber communication system, and can also be used as The important light source in the optical fiber and fiber grating sensing test system can be widely used in the field of optical fiber communication and optical fiber sensing technology. Background technique [0002] Fiber Bragg Grating is a new type of photonic device whose output light wavelength is the information. The successful development of fiber gratings has effectively promoted the development of fiber lasers. Fiber laser is a key device in high-speed and large-capacity communication systems. Its wide gain bandwidth and laser operating wavelength are just in the 1550nm low-loss band of optical communication. Especially th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/00H01S3/067H01S3/0941
Inventor 开桂云张伟刚袁树忠董孝义
Owner NANKAI UNIV
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