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A 8-shaped multi-wavelength optical fibre laser

A fiber laser, multi-wavelength technology, used in lasers, laser parts, phonon exciters, etc., can solve problems such as application limitations

Inactive Publication Date: 2009-09-30
JIANGXI NORMAL UNIV
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Problems solved by technology

At present, there are many ways to realize multi-wavelength fiber lasers. The main method is to soak the erbium-doped fiber (EDF) in liquid nitrogen and cool it to suppress its uniform broadening mechanism. This method cannot work at room temperature, so its application is extremely restricted. big limit

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  • A 8-shaped multi-wavelength optical fibre laser
  • A 8-shaped multi-wavelength optical fibre laser

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0015] The invention designs a precision tunable multi-wavelength ring fiber laser. Its structure is as figure 1 shown.

[0016] The polarization-maintaining fiber used in this embodiment is 11 m long, a single-mode fiber is 16.5 km long, and the pumping power of the 980 nm laser is fixed at 168 mw. By carefully adjusting the two polarization controllers inside the laser cavity, two types of output spectra with different properties can be observed: passive mode-locked and continuous wave multi-wavelength. There have been many studies on passively mode-locked fiber lasers based on nonlinear fiber loop mirrors. Due to the effect of nonlinear polarization rotation, when the transmission of nonlinear fiber loop mirrors increases with the increase of light intensity, the role of nonlinear fiber loop mirrors It is equivalent to an equivalent satur...

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Abstract

The invention provides a 8-shaped multi-wavelength optical fibre laser belonging in the light communication and optical fibre laser field. The novel omni- optical fibre structure multi- wavelengh optical fibre laser is constituted of non-linearity optical fibre ring mirror and unidirectional ring shaped laser cavity, the two constitutes jointing with a 3dB coupler. In the unidirectional ring shaped laser cavity, there is erbium-doped fiber optical fibre as gain medium, the wavelength-division multiplex machine couples the erbium-doped fiber optical fibre into 980 nm pumping laser, the polarization-dependant isolator ensures the laser cavity unidirectional working and has the function of polarizer, there still is a polarization controller, polarization maintaining fiber, a 10dB coupler with splitting ratio of 10 / 90 with 10% port is for the output of luminous signs and luminous signs out from the 90% port remains cycling in the cavity. The non-linearity optical fibre ring mirror is made up of two polarization controllers and a long single mode fiber.

Description

technical field [0001] The invention relates to the fields of optical communication and fiber lasers, and in particular provides an 8-shaped multi-wavelength fiber laser. Background technique [0002] Multi-wavelength lasers can provide multiple channel light sources for modern optical wavelength division multiplexing (WDM) communication systems at the same time, making the design of the optical transmitter more compact and economical, so it plays a very important role in dense wavelength division multiplexing (DWDM) systems application value. The multi-wavelength fiber laser has the advantages of narrow line width, high output power, good stability, and easy compatibility with optical fiber communication systems, and is very suitable for dense wavelength division multiplexing communication systems. Multi-wavelength fiber lasers are not only widely used in optical communication light sources, but also have broad application prospects in many fields such as optical sensing, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/098
Inventor 张祖兴叶志清况庆强桑明煌聂义友
Owner JIANGXI NORMAL UNIV
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