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Bidirectional femtosecond pulse-based deep space gravitational wave detection method and device

A femtosecond pulse and detection method technology, applied in the field of gravitational wave detection, can solve the problems of difficult real-time communication and low detection sensitivity at the measurement end, and achieve the effects of avoiding high-precision clock synchronization, ensuring detection sensitivity, and avoiding real-time communication

Active Publication Date: 2016-05-11
HARBIN INST OF TECH
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Problems solved by technology

[0010] The present invention proposes and designs a method for gravitational wave detection and long-distance laser measurement and the detection sensitivity of the device is low, the measurement range needs to be further improved, and it is difficult to realize real-time communication and high-precision clock synchronization between distant measurement terminals. A method and device for detecting gravitational waves in deep space based on two-way femtosecond pulses

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  • Bidirectional femtosecond pulse-based deep space gravitational wave detection method and device
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  • Bidirectional femtosecond pulse-based deep space gravitational wave detection method and device

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Embodiment Construction

[0029] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] The deep-space gravitational wave detection device based on two-way femtosecond pulses of this embodiment, figure 1 A schematic diagram of its overall configuration structure, figure 2 It is a schematic diagram of the device structure. The measuring end of the device includes No. 1 femtosecond laser 2, No. 1 splitting optical path 11, No. 1 balanced photodetection unit 1, No. 1 control unit 13 and optical delay line scanning unit 12; The No. 1 active reflector and the No. 2 active reflector are respectively installed at the two ends to form an equal-arm-length differential detection structure for gravitational wave signals. The two equal-length measuring arms adopt a pulse-time-domain-locked bidirectional measuring structure; The No. 1 active reflector is composed of No. 2 femtosecond laser 9, No. 2 splitting light path 10, No. 2 balanced phot...

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Abstract

The invention relates to a bidirectional femtosecond pulse-based deep space gravitational wave detection method and device and belongs to the gravitational wave detection field. According to the method, equal-arm length differential detection on gravitational wave signals is realized through scanning optical delay lines, and detection sensitivity can reach a sub nanometer level; and two measuring arms are both of a pulse time-domain lock type bidirectional measurement structure, so that light echo power of a system can be calculated according to a square attenuation function of the distance instead of an original biquadrate attenuation function of the distance, and therefore, detection of deep space gravitational waves at a scale of hundreds of millions of kilometers can be realized. The device comprises a measuring end at a master satellite, a No. 1 active reflector located at a slave satellite A and a No. 2 active reflector located at a slave satellite B. With the method and device adopted, problems in real-time communication and high-accuracy clock synchronization between satellites which are separated from each other by long distances can be solved.

Description

technical field [0001] The invention belongs to the field of gravitational wave detection, and mainly relates to a femtosecond laser-based deep-space gravitational wave detection method and device. Background technique [0002] For many years, the detection of gravitational waves has been a research hotspot all over the world. The detection of gravitational waves is a direct verification of the predictions of general relativity and a direct test of its core ideas. The origin and evolution of the universe is of great significance. The detection of gravitational waves directly contributed to the birth of gravitational wave astronomy, making it possible to observe the universe with gravitational waves instead of traditional electromagnetic wave means, which can provide us with a large amount of information that could not be obtained in the past, and provide a new way for people to further deepen their understanding of the universe. way. [0003] Long-distance precision displa...

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Application Information

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IPC IPC(8): G01S17/48
CPCG01S17/48
Inventor 于亮谭久彬
Owner HARBIN INST OF TECH
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