Device for producing frequency multiplication low noise microwave signals

A microwave signal, low-noise technology, applied in electromagnetic transmitters and other directions, can solve the problem of excessive phase noise of optically generated microwave signals, and achieve the effect of wide-range locking

Active Publication Date: 2013-10-09
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Problems solved by technology

[0009] The purpose of the present invention is to provide a stable frequency-multiplied optical-generated microwave source to solve the problem of excessive phase noise of optically-generated microwave signals, and the present invention utilizes low-frequency microwave sources to generate multi-frequency microwave signals

Method used

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  • Device for producing frequency multiplication low noise microwave signals
  • Device for producing frequency multiplication low noise microwave signals
  • Device for producing frequency multiplication low noise microwave signals

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Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0021] figure 1 It shows a structural principle diagram of a device for generating multi-frequency low-noise microwave signals provided by the present invention. Such as figure 1 As shown, the device includes:

[0022] Tuned laser 1 is used to output a tuned laser source whose wavelength can be continuously transmitted in the C-band. The tuned laser source is divided into an upper tuned laser and a lower tuned laser through a coupler 6. The upper light source is input into the coupler 7 as a reference signal; The light source of the road is input to port a of the circulator 4; wherein, preferably, the output light of the tuned laser 1 and the output light of the directly tuned laser have an optical frequency interval be...

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Abstract

The invention discloses a device for producing frequency multiplication low noise microwave signals. The device comprises a tuned laser, a straight adjustable laser, a stabilization microwave source, a first coupler and a detector. The tuned laser is used for outputting tunable laser, a part of the tunable laser is injected to the straight adjustable laser, the straight adjustable laser is an injected and locked auxiliary laser, and the straight adjustable laser generates vertical sideband light under modulation of a low-frequency microwave signal. The stabilization microwave source is used for outputting the low-frequency microwave signal to the straight adjustable laser, the first coupler is used for outputting the other part of the tunable laser and the vertical sideband light to the detector after the other part of the tunable laser and the vertical sideband light are coupled, and the detector is used for conducting photovoltaic conversion on the tunable laser input into the detector and the vertical sideband light input into the detector so as to convert the tunable laser and the vertical sideband light into a high-frequency microwave signal. According to the scheme, a light source of the straight auxiliary adjustable laser and a light source of the tuned laser are in phase correlation through light injection, the stabilization microwave source tunes the straight adjustable auxiliary laser to generate a stable vertical sideband, and the stable multi-time frequency microwave signals which are triple than the microwave signal are generated.

Description

technical field [0001] The invention relates to the technical field of light-generated microwaves, in particular to a device for generating multi-frequency and low-noise microwave signals. Background technique [0002] With the development of satellite communication, radar, radio-on-fiber (RoF) system, and wireless optical network, the demand for a microwave source with low noise and wide coverage is becoming more and more urgent. Especially in recent years, with the rapid development of optical communication systems, there is an urgent need for an optically-generated microwave source with stable frequency, which is mainly used for carrier transmission signals. The transmission process of high-frequency microwave signals in the cable is very lossy and cannot be transmitted over long distances. The loss of optical fiber transmission is relatively low, 0.2dB / km, and has a strong ability to resist electromagnetic interference. Therefore, using optical fiber to transmit microwa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/50
Inventor 祝宁华孙文惠郑建宇刘建国
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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