The research on the photo-electronic integrated acceleration seismic detecting technology

Zhengrong Tong; Jianxia Wei; De En; Caihe Chen; Yuming Cui; Chao Li

doi:10.1117/12.725753

29 January 2007 The research on the photo-electronic integrated acceleration seismic detecting technology

Zhengrong Tong, Jianxia Wei, De En, Caihe Chen, Yuming Cui, Chao Li

Proceedings Volume 6279, 27th International Congress on High-Speed Photography and Photonics; 62796P (2007) https://doi.org/10.1117/12.725753
Event: 27th International congress on High-Speed Photography and Photonics, 2006, Xi'an, China

Abstract

For high resolution application in seismic detection, the geophone should be smaller in size, more reliable and sensitive. So a kind of photo-electronic integrated acceleration seismic detecting technology, which is novel and precise based on waveguide M-Z interference, is presented. The principle of the photo-electronic integrated acceleration seismic geophone is introduced in this paper. The seismometer is composed of a waveguide M-Z interferometer, a sensing element, a modulation LD and signal processing system. The silicon crystal is adopted as the substrate. The core of the photoelectronic integrated acceleration is the silicon harmonic oscillator, which is supported by four silicon beams and integrated on the signal beam of the M-Z interferometer . The harmonic oscillator translates the acceleration information of the external vibrational signal into phase variation of optical signal in the sensing arm, which is converted into optical signal by M-Z interferometer, then PIN converts the optical signal into electric signal to process by the signal processing. The experimental curve of seismometer frequency response is achieved.

Citation Download Citation

Zhengrong Tong, Jianxia Wei, De En, Caihe Chen, Yuming Cui, and Chao Li "The research on the photo-electronic integrated acceleration seismic detecting technology", Proc. SPIE 6279, 27th International Congress on High-Speed Photography and Photonics, 62796P (29 January 2007); https://doi.org/10.1117/12.725753

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KEYWORDS

Waveguides

Interferometers

Silicon

Signal processing

Oscillators

Modulation

Mirrors

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