A device for generating multiple microwave local oscillator sources based on microwave photons

Abstract

The invention discloses a multi-microwave local oscillation source generating device based on microwave photons. The device comprises a narrow linewidth laser, a light beam splitter, a first broadband microwave source, a second broadband microwave source, a first phase modulator, a second phase modulator, a beam combination device and a wavelength division multiplexer. The narrow linewidth laser is used for providing a coherent seed light source, the light beam splitter is used for dividing the seed light source into two paths, and outputting the paths to the first phase modulator and the second phase modulator respectively, the first broadband microwave source is used for providing a first broadband microwave signal, the second broadband microwave source is used for providing a second broadband microwave signal, the first phase modulator utilizes the first broadband microwave source signal to modulate the seed light, and generates a first microwave modulation light signal, the second phase modulator utilizes the second bandwidth microwave source signal to modulate the seed light and generates a second microwave modulation light signal, the beam combination device is used for conducting beam combination on the first microwave modulation light signal and the second microwave modulation light signal to generate mixed light, and the wavelength division multiplexer is used for conducting fractional frequency band outputting on the mixed light so as to generate a multi-microwave local oscillation source.

Description

technical field [0001] The invention belongs to the field of microwave photonics, and more specifically relates to a multi-microwave local oscillator source generator based on microwave photons. Background technique [0002] At present, broadband satellite communication, optical fiber communication, and wireless communication are listed as the three major communication technologies, which play an important role in supporting the national economy and national information security. Driven by the user's huge communication capacity demand, satellite communication requires multi-carrier frequency conversion, so multi-microwave local oscillator sources are required. In addition, high-performance multiple local oscillator sources are also required in channelized receivers for network space spectrum detection. [0003] In my country, the satellite communication system is one of the three major communication pillar industries in my country. At present, China Satcom is leading the wa...

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Problems solved by technology

[0006] 2. Load weight and power consumption

[0007] Since future communication satellites need to be compatible with multiple frequency bands of S, C, X, Ku, K, and Ka, the structure of the transponder is complex, which increases the weight and power consumption of the system

[0008] 3. Electromagnetic interference problem

[0009] The use of a large number of electronic components increases the electromagnetic interference and signal crosstalk between systems

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