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Device and method for generating microwave signals by using multi-wavelength Brillouin laser

A microwave signal and laser technology, which is applied in the fields of optoelectronics and microwave photonics, can solve the problems of difficulty in obtaining high-frequency microwave signals, and achieve the effects of suppressing the four-wave mixing effect, simple structure, and flat power spectrum distribution

Inactive Publication Date: 2010-08-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the fixed channel spacing of 10GHz due to the stimulated Brillouin effect, it becomes difficult to obtain high-frequency microwave signals greater than 10GHz

Method used

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  • Device and method for generating microwave signals by using multi-wavelength Brillouin laser
  • Device and method for generating microwave signals by using multi-wavelength Brillouin laser
  • Device and method for generating microwave signals by using multi-wavelength Brillouin laser

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Experimental program
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Effect test

Embodiment 1

[0041] When the central wavelength of the pump light output by the adjustable light source is 1560.585nm, the pump light power is 8dBm, and the gain of the erbium-doped fiber amplifier is 16dBm, a multi-wavelength fiber laser with 14 Stokes lines is obtained, such as figure 2 shown. The output spectrum of the multi-wavelength fiber laser is measured every 30 minutes, and the power spectrum of the multi-wavelength laser is very stable, such as image 3 shown.

Embodiment 2

[0043] When the central wavelength of the pump light output by the adjustable light source is 1556.742nm, the pump light power is 4dBm, and the gain of the erbium-doped fiber amplifier is 16dBm, a multi-wavelength laser light source with an interval of 0.088nm can be obtained. The center frequency of the fiber Bragg grating is designed to be 1556.830nm, which can filter out the first-order Stokes wave. Properly adjust the optical power of the first-order Stokes wave and the pump light to keep them approximately equal, such as Figure 4 (a) shown. Then beat the first-order Stokes wave and pump light through a high-speed photodetector to obtain a 10.8GHz microwave signal. Similarly, adjust the output center wavelength of the pump source to 1556.656nm, that is, control the second-order Stokes wave just within the filtering range of the fiber Bragg grating, and the center frequency of the fiber Bragg grating is still 1556.830nm. 21.6GHz microwave signal can be obtained. Using t...

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Abstract

The invention relates to a device and a method for generating microwave signals by using a multi-wavelength Brillouin laser. An existing device obtains a high frequency difficultly. The device of the invention comprises an adjustable narrow-band light source, two isolators, three couplers, an erbium-doped optical fiber amplifier, two optical fiber circulators, a Sagnac loop mirror, an optical fiber Bragg grating and a photodetector. The adjustable narrow-band light source is in optical connection with the isolators; the isolators are in optical connection with the couplers; outputs of the couplers are in optical connection with another coupler respectively; one of optical paths is provided with the erbium-doped optical fiber amplifier, the two optical fiber circulators and the Sagnac loop mirror. The method for generating the microwave signals by using the device comprises the following steps that: pump spectrum light emitted by the adjustable narrow-band light source is split into two paths of pump spectrum light after passing through the isolators and the couplers, one path of the pump spectrum light performs beat frequency with the other path of the pump spectrum light after outputting single-channel high-order Stocks light so as to obtain high-frequency microwave signals. The device and the method change the wavelength of the pump spectrum light to make a multi-wavelength pass band continuously adjustable.

Description

technical field [0001] The invention belongs to the fields of optoelectronics and microwave photonics, and relates to a device and method for generating microwave signals by using a multi-wavelength Brillouin laser, which is suitable for wireless communication and radar communication systems. Background technique [0002] With the rapid development of information technology and the rapid development of information industry, the demand for information in people's production and life, national defense construction and other aspects is increasing day by day. Among them, wireless communication, as a common tool for communication, is widely used in data services, voice, and military industries. Using high-frequency microwave and millimeter wave signals as the carrier, the system capacity will be greatly improved. Due to the constraints of electronic bottlenecks, the development of microwave signal sources to the high frequency band of 30-70 GHz is a great challenge for tradition...

Claims

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Application Information

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IPC IPC(8): H01S3/30H01S3/091H01S3/10
Inventor 傅娇娇孙兵周斌陈达如高士明
Owner ZHEJIANG UNIV
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