Phase noise measurement device and measurement method based on laser frequency discrimination and cross-correlation processing

A phase noise and measurement device technology, which is applied in the field of optical information processing, can solve the problems that radio frequency devices cannot meet the measurement requirements, the delay line adjustable range is low, and the frequency offset range is low, so as to improve the offset frequency range and adjust The effect of wide range and improved noise sensitivity

Active Publication Date: 2021-09-07
SHANGHAI JIAOTONG UNIV
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Problems solved by technology

However, as the frequency increases, the bandwidth of the RF device is difficult to meet the measurement conditions, and the phase noise at high frequencies increases. Whether it is used as a reference source for noise measurement or as an active device in the subsequent measurement link, higher extra noise
And for the frequency discrimination method, the adjustable range of the delay line based on the RF device is low, which means that the frequency offset range will also be low
Therefore, limited by its own bandwidth limitation and noise performance, the measurement of RF devices in high-frequency band signals cannot meet the measurement requirements

Method used

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  • Phase noise measurement device and measurement method based on laser frequency discrimination and cross-correlation processing
  • Phase noise measurement device and measurement method based on laser frequency discrimination and cross-correlation processing

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[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, but the protection scope of the present invention is not limited to the following embodiments.

[0023] In this example, if figure 1 As shown, the phase noise measurement device based on laser frequency discrimination and cross-correlation processing includes a signal source to be tested 1, a laser source module 2, a laser source module 3, a delay line module 4, a delay line module 5, an optoelectronic mixing module 6, an optoelectronic Frequency mixing module 7, photoelectric conversion module 8, photoelectric conversion module 9, data acquisition and cross-correlation algorithm processing module 10:

[0024] The output end of the signal source 1 to be tested is divided into four, two of which are connected with the photoelectric mixing source module 6 described in the first measurement link and the photoelectric mixing source module 6 described in the...

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Abstract

A phase noise measurement device and measurement method based on laser frequency discrimination and cross-correlation processing. A laser lock cross-correlation processing phase noise measurement, including two identical independent measurement links, each of which includes a laser source module, a delay line module, a photoelectric mixing module, a photoelectric conversion module, and a signal module to be tested and a data acquisition module and the cross-correlation algorithm processing module are shared by the two links. The invention can reduce the background noise of the measurement link, improve the noise sensitivity and improve the measurement accuracy of the link.

Description

technical field [0001] The invention relates to optical information processing technology, in particular to a phase noise measurement device and measurement method based on laser frequency discrimination and cross-correlation processing, which realizes high-precision phase noise measurement of high-frequency band signals within a large measurement bandwidth. Background technique [0002] Phase noise plays an increasingly important role in the current radio frequency microwave processing, radar detection system and communication system. It affects various indicators of the system and also has important guiding significance in the research and development of the system structure. Phase noise measurement can effectively improve the performance of the system. The measurement methods of phase noise are mainly divided into phase detection method, frequency detection method and direct spectrum measurement method. The phase detection method extracts the noise signal by mixing the re...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R29/26G01S7/40H04B1/40
CPCG01R29/26G01S7/40H04B1/40
Inventor 邹卫文李成功于磊钱娜陈建平
Owner SHANGHAI JIAOTONG UNIV
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