A high-sensitivity and wide-bandwidth photonic microwave frequency measurement device and method
A photonic microwave and frequency measurement technology, applied in the field of microwave photonics, can solve the problems of low sensitivity and small measurement range, and achieve high sensitivity
Active Publication Date: 2017-12-26
DALIAN UNIV OF TECH
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Problems solved by technology
[0007] The invention provides a high-sensitivity and large-bandwidth photon microwave frequency measurement device and method, which effectively solves the problems of low sensitivity and small measurement range of photon microwave frequency measurement in the background technology
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[0048] Figure 4 It is the optical notch filter 4 used in the embodiment of the present invention, which is composed of an optical circulator 41 and a phase-shifting fiber grating 42 .
[0049] The output frequency of tunable laser 1 is f C The optical carrier is input to the optical input port of the electro-optic phase modulator 2, and the microwave signal to be measured is input to the radio frequency input port of the electro-optic phase modulator 2 through the second port 82 of the electric combiner 8, and the microwave signal is transmitted in the electro-optic phase modulator 2 The signal is modulated onto the optical carrier; the electro-optic phase modulator 2 outputs a phase-modulated optical carrier microwave signal. The phase modulated optical carrier microwave signal enters the optical notch filter 4 after being amplified by the optical amplifier 3; Figure 5 Spectrum diagrams of the optical carrier microwave signal at A, B, and C in the optical notch filter 4 a...
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The invention discloses a high-sensitivity large-bandwidth photon microwave measuring device and method, and belongs to the technical field of microwave photons. In the device, an electro-optical phase modulator, an optical amplifier, an optical trap wave filter, a photoelectric detector, an electrical amplifier, an electric demultiplexer and an electric combiner form an oscillation loop, the optical amplifier and the electrical amplifier can amplify the circulation power of transmission signals in the oscillation loop, input weak microwave signals to be measured are measured, and the sensitivity is extremely high. The device does not include an electric filter, and is not limited by the bandwidth of the electric filter, the frequency range of light waves output by a tunable laser and the filtering response bandwidth of the optical trap wave filter can reach hundreds of GHz, and microwave frequency measurement can be realized in a large bandwidth range; and the problems that a photon microwave frequency measuring device in the prior art is complex in structure, low in sensitivity and narrow in the measurement range are solved.
Description
technical field [0001] The invention belongs to the field of microwave photon technology, and in particular relates to a high-sensitivity and large-bandwidth photon microwave frequency measurement device and method. Background technique [0002] Microwave frequency measurement is an important technology in radio astronomy, electronic warfare and other fields. With the rapid development of microwave technology, the frequency band of microwave work is rising steadily, almost spanning the frequency band from 2MHz to 300GHz. Traditional electronic frequency measurement methods, such as multi-channel method, frequency discrimination method, interferometer phase comparison method, standing wave phase detection method, etc., are difficult to achieve due to the electronic bottleneck and instantaneous bandwidth limitation of mixers, filters and other devices. It meets the requirements of large-scale, fast and accurate measurement of unknown microwave signal monitoring in future deep...
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IPC IPC(8): G01R23/02
CPCG01R23/02
Inventor 韩秀友赵明山
Owner DALIAN UNIV OF TECH