Device for single polarization dual-wavelength fiber grating laser to generate microwave, millimeter wave

A fiber grating, single-polarization technology, applied in the field of devices for generating microwaves and millimeter waves by a single-polarization dual-wavelength fiber grating laser, can solve the problems of low efficiency, complex structure, poor stability, etc., and achieves low environmental impact, easy implementation, Cost-effective effect

Inactive Publication Date: 2008-05-21
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These production methods have complex structures, poor stability, and low production efficiency.

Method used

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  • Device for single polarization dual-wavelength fiber grating laser to generate microwave, millimeter wave

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Effect test

Embodiment 1

[0033] A device for generating microwaves and millimeter waves by a single-polarization dual-wavelength fiber grating laser, the connection between the components is as follows:

[0034] Insert a 2cm long polarization-maintaining fiber grating 11 at the one-word end 41 of the Y splitter with a splitting ratio of 50:50, and the output end of the one-word end 41 of the Y splitter is connected with the detector 51;

[0035] Insert a 1m-long active optical fiber 21 into a bifurcated arm 42 of a Y splitter with a splitting ratio of 50:50, and insert a broadband fiber grating 12 at the other end of the active optical fiber 21;

[0036] Another branch arm 43 of the Y splitter with a split ratio of 50:50 is connected to the active optical fiber 22, and the other end of the active optical fiber 22 is connected to a broadband fiber grating 13;

[0037] The reflection spectra of the two broadband fiber gratings are separated from each other, or have a weak overlapping part, and the refle...

Embodiment 2

[0046] A device for generating microwaves and millimeter waves by a single-polarization dual-wavelength fiber grating laser, the connection between the components is as follows:

[0047] Insert a 3cm long polarization-maintaining fiber grating 11 at the one-word end 41 of the Y splitter with a splitting ratio of 50:50, and the output end of the one-word end 41 of the Y splitter is connected with the detector 51;

[0048] A 2m-long polarization-maintaining active fiber 21 is connected to a bifurcated arm 42 of a Y splitter with a splitting ratio of 50:50. The polarization-maintaining active fiber can be erbium-doped, or ytterbium-doped, or holmium-doped, or ytterbium-erbium Co-doped or thorium-doped, a broadband fiber grating 12 is connected to the other end of the polarization-maintaining active fiber 21;

[0049] The polarization maintaining active optical fiber 22 is connected to another bifurcated arm 43 of the Y splitter with a splitting ratio of 50:50, and a broadband fib...

Embodiment 3

[0059] A device for generating microwaves and millimeter waves by a single-polarization dual-wavelength fiber grating laser, the connection between the components is as follows:

[0060] A polarization-maintaining fiber grating 11 is inserted into the Y splitter or the one-word end 41 of the coupler at any split ratio, and the output end of the Y splitter or the one-word end 41 of the coupler is connected to the detector 51;

[0061] Insert an active optical fiber 21 of appropriate length into a bifurcated arm 42 of a Y splitter or a coupler with an arbitrary splitting ratio, and insert a broadband fiber grating 12 at the other end of the active optical fiber 21;

[0062] Connect the active optical fiber 22 to another branch arm 43 of the Y splitter or coupler with any splitting ratio, and connect a broadband fiber grating 13 to the other end of the active optical fiber 22;

[0063] The reflection spectra of the two broadband fiber gratings are separated from each other, or ha...

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Abstract

The invention discloses a device of single-polarization dual-wavelength fiber grating laser producing microwaves, millimeter-waves, which is characterized in that: the slot end (41) of a Y-divider on the device is connected with a polarization maintaining fiber grating (11); the output of the slot end terminal of the Y-divider is connected with a detector (51); a fork arm (42) of the Y-divider is connected with an active fiber (21); the other end of the active fiber is connected with a broadband fiber grating (12), and forms a resonant cavity with the polarization maintaining grating (11 ); a fork arm (43) of the Y-divider is connected with an active fiber (22), the other end of the active fiber (22) is connected with a broadband fiber grating (13), and forms the other resonant cavity with the polarization maintaining grating (11 ); the pumping lights (31) and (32) are coupled into the active fibers (21) and (22) by two couplers which are respectively on the back of the broadband fiber grating (12) and (13), and respectively generates single-polarized lasers, and enters the detector (51) through the fiber terminal (41), and difference frequency microwaves or millimeter-waves are produced in the detector.

Description

technical field [0001] The invention relates to the fields of optical fiber microwave communication (RoF: Radio on / over Fiber), microwave photons, optical fiber sensing, optical fiber lasers, optical fiber communication, and radar. It is suitable for generating microwave and millimeter waves by using single-polarized dual-wavelength fiber grating lasers. Background technique [0002] Microwave photonics technology combines microwave and optics to become a new technical field, usually called Microwave Photonics (abbreviated as MWP). The integration of photonic technology with microwave and millimeter waves has opened up a fascinating and promising field in the development of long-distance communication. Combining optical technology and radio wave technology, taking advantage of the characteristics of low loss, large capacity, non-inductive, light weight, and easy handling of optical fibers, introducing optical technology into traditional microwave technology can form the bas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S1/00H01S3/067H01S3/16G02B6/02G02B6/00
Inventor 宁提纲胡旭东郑晶晶祈春慧阮乂董小伟谭中伟刘艳童治裴丽
Owner BEIJING JIAOTONG UNIV
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