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Periodic optical fiber notch filtering device

A kind of notch filtering and periodic technology, applied in the direction of optical fiber transmission, optical fiber radio, electromagnetic wave transmission system, etc., can solve the problems of large insertion loss of coaxial line, large occupied area, large difference in notch effect, etc. The effect of wave depth, precise vertical adjustment

Active Publication Date: 2022-02-08
INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
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  • Description
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  • Application Information

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Problems solved by technology

[0004]Traditional periodic notch filter devices are built with coaxial cables. The insertion loss of the axis itself is relatively large, so that the notch effect varies greatly within the entire bandwidth, and the beam cannot be cooled better

Method used

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  • Periodic optical fiber notch filtering device
  • Periodic optical fiber notch filtering device
  • Periodic optical fiber notch filtering device

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Such as figure 1 As shown, this embodiment provides a periodic optical fiber notch filter device, including: a radio frequency conversion module, an optical power splitter, a parallel delay branch, and a microwave bridge. Wherein, the RF signal input end of the RF-to-optical module is connected to the RF signal to be filtered, and the optical signal output end of the RF-to-optical module is connected to the signal input end of the optical power splitter; the first output end of the optical power splitter and the second The two output ends are respectively connected to the two input ends of the parallel delay branch; the two output ends of the parallel delay branch are respectively connected to the two input ends of the microwave bridge, which are used to generate two channels with time Delayed radio frequency signal; the microwave bridge is used to superimpose two radio frequency signals with time delay difference in reverse phase, and complete the filtering of the spec...

Embodiment 2

[0054] Such as figure 1 As shown, the periodic optical fiber notch filter device provided in this embodiment includes: RF-to-optical module 1, optical power splitter 2, fixed optical attenuator 3, adjustable optical attenuator 4, optical-to-RF module 5, 180° Microwave bridge 6, time-delay fiber 7, constant temperature box 8, adjustable light delay 9, light-to-radio frequency module 10, 50Ω matching load 11, wherein the time-delay fiber 7 is placed in the constant temperature box 8.

[0055] The radio frequency signal is input from the radio frequency signal input terminal of the radio frequency conversion optical module 1, the optical signal output terminal of the radio frequency conversion optical module 1 is connected to the input terminal of the optical power splitter 2, and the output terminal S1 of the optical power splitter 2 is connected to the fixed optical attenuator 3, The fixed optical attenuator 3 is connected to the adjustable optical attenuator 4 , the adjustable...

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Abstract

The invention relates to a periodic optical fiber notch filtering device. The periodic optical fiber notch filtering device comprises a radio frequency light conversion module, an optical power divider, a parallel delay branch and a microwave bridge, wherein a radio frequency signal input end of the radio frequency light conversion module is connected with a radio frequency signal to be filtered, and an optical signal output end of the radio frequency light conversion module is connected with a signal input end of the optical power divider; a first output end and a second output end of the optical power divider are respectively connected with two input ends of the parallel delay branch; the two output ends of the parallel delay branch are connected with the two input ends of the microwave bridge respectively, and the parallel delay branch is used for generating two paths of radio frequency signals with delay difference according to specific frequency needing to be filtered; and the microwave bridge is used for carrying out reverse-phase superposition on the two paths of radio-frequency signals with time delay inequality, completing filtering of a specific frequency and an integer frequency multiplication point of the frequency point, and obtaining a filtered radio-frequency signal. The device can be widely applied to the field of radio frequency signal filtering.

Description

technical field [0001] The invention relates to a periodic optical fiber notch filter device for a circular accelerator, which belongs to the field of random cooling and beam feedback of the circular accelerator beam. Background technique [0002] In a circular particle accelerator, in order to ensure and improve the quality of the beam, it is necessary to introduce a beam cooling system and a beam feedback system to adjust the beam horizontally and vertically. [0003] As a kind of beam cooling system, the stochastic cooling system is mainly used for cooling large momentum dispersed beams, high energy beams and rare particle beams. In the stochastic cooling system, Notch cooling can perform longitudinal fine cooling of the beam to increase the cooling efficiency, while in the Notch cooling, a periodic filter device that can filter the operating frequency of the beam and its integer multiple frequency is required. In the beam current feedback system, the periodic filtering ...

Claims

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Application Information

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IPC IPC(8): H04B10/2575H04B10/67
CPCH04B10/2575H04B10/675
Inventor 张兆龙朱光宇武军霞尹佳张鑫杨建成
Owner INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
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