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Radio frequency channelization method based on optical comb double modulation sidebands and implementation device

A dual-modulation, optical comb technology, applied in the field of optical communication, can solve the problems of reduction and low energy utilization, and achieve the effect of reducing implementation costs

Active Publication Date: 2019-09-13
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To solve the problem of low energy utilization rate caused by only using a single sideband in the prior art; it also reduces the comb tooth interval of the local oscillator comb, and alleviates the problem that the number of lower flat comb teeth varies with the comb tooth interval during the generation of the optical comb. increasing and decreasing problems

Method used

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  • Radio frequency channelization method based on optical comb double modulation sidebands and implementation device
  • Radio frequency channelization method based on optical comb double modulation sidebands and implementation device
  • Radio frequency channelization method based on optical comb double modulation sidebands and implementation device

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Embodiment 1

[0052] This embodiment discloses an improved method for radio frequency channelization processing, specifically setting the comb tooth interval of the signal optical comb and the local oscillator optical comb, specifically:

[0053] FSR signal = 2f 1 +2f 2 +2f BW (1)

[0054] FSR local =f 1 +f 2 +2f BW (2)

[0055] or

[0056] FSR local =f 1 +f 2 (3)

[0057] Among them, FSR signal is the tooth interval of the signal comb, FSR local is the tooth interval of the local oscillator comb, f BW is the expected channel bandwidth, f 1 is the minimum frequency of the RF signal to be processed, if the number of channels is even, then f 2 is the maximum frequency of the RF signal to be processed, if the number of channels is an odd number, then f 2 Subtract f from the maximum frequency of the RF signal to be processed BW .

[0058] After using the above formula, the period can be guaranteed to be FSR local The periodic optical filter continuously collects the uppe...

Embodiment 2

[0060] This embodiment discloses a radio frequency channelization method based on optical comb dual modulation sidebands, including:

[0061] Transmitting the coherent signal light and the local oscillator light to the signal optical comb generation module and the local oscillator optical comb generation module respectively;

[0062] The signal optical comb generation module modulates the received signal light to generate a comb tooth interval of FSR signal The optical comb is output to the modulation module;

[0063] The local oscillator optical comb generation module modulates the received local oscillator light to generate a comb tooth interval of FSR local of optical combs, the output to channel spacing is FSR local The channel separation module;

[0064] The modulation module is based on the optical signal sent by the signal optical comb generation module. After modulating the RF signal to be processed, the output to the cycle is FSR local The periodic optical filteri...

Embodiment 3

[0071] See attached figure 1 , the present embodiment discloses a radio frequency channelization device based on optical comb double modulation sideband, comprising: a coherent light generation module, a signal optical comb generation module, a local oscillator optical comb generation module, a first electro-optic modulator (ie, a modulation module ), a periodic filter, a channel separation module, and a photoelectric conversion array (i.e. a coherent processing module); It is transmitted to the signal optical comb generation module and the local oscillator optical comb generation module; the signal optical comb generation module generates a comb interval of FSR signal The optical comb, the signal optical comb generation module is connected to the optical input end of the first electro-optic modulator; the RF signal to be processed is input to the RF input end of the first electro-optic modulator; the output end and period of the first electro-optic modulator are FSR local Th...

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Abstract

The invention discloses a radio frequency channelization method based on optical comb double modulation sidebands and an implementation device. The method comprises the following steps: generating coherent signal light and local oscillation light; the signal optical comb generation module modulating an optical comb with a comb tooth interval of FSRsignal; wherein the local oscillation optical combgeneration module modulates an optical comb with a comb tooth interval of FSRlocal, the modulation module modulating an RF signal based on the signal optical comb, the RF signal being filtered by thefilter, and performing coherent receiving processing after channel division is performed based on an output signal of the filter and the local oscillation optical comb. The device comprises a coherent light generation module, a signal optical comb generation module, a local oscillator optical comb generation module, a modulation module, a periodic filter, a channel separation module and a coherent processing module. According to the method and the device, the comb tooth interval of the local oscillation optical comb can be reduced, the requirement on the number of comb teeth of the signal optical comb is reduced, the energy utilization rate is improved, and the channelization difficulty is reduced.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to a radio frequency channelization method and an implementation device based on optical comb double modulation sidebands. Background technique [0002] Frequency channelization is to divide the frequency band into several sub-frequency bands-channels through a set of filters covering the entire frequency band. CN108650013A discloses a channelization system based on optical frequency shift. The system does not need an optical comb signal generator, but the number of channels is proportional to the number of optical frequency shift modules. For N channels, about N / 2 optical frequency shifts are required module. The optical frequency shift module is realized by DPMZM, and its cost and control difficulty of SSB carrier suppression are relatively high. However, the coherent optical frequency comb beat difference scheme has a smaller system scale when the number of channels is larg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/516H04B10/29
CPCH04B10/29H04B10/516H04B10/5165
Inventor 刘静娴钟欣周涛陈智宇王茂汶
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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