A low cost rotational seismometer for seismic exploration

Junzhu Wu; Dingfan Zhang; Chao Rong; Lanxin Zhu; Yuwen Cao; Zhengbin Li

doi:10.1117/12.2656429

9 January 2023 A low cost rotational seismometer for seismic exploration

Junzhu Wu, Dingfan Zhang, Chao Rong, Lanxin Zhu, Yuwen Cao, Zhengbin Li

Proceedings Volume 12507, Advanced Optical Manufacturing Technologies and Applications 2022; and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing (AOMTA and YSAOM 2022); 125072A (2023) https://doi.org/10.1117/12.2656429
Event: 2nd International Forum of Young Scientists on Advanced Optical Manufacturing (AOMTA and YSAOM 2022), 2022, Changchun, China

Abstract

In recent years, with the development of rotation direct measurement instruments, rotational seismology has gradually become a hot field, and it is proposed that observation needs high sensitivity. The rotational seismometer based on fiber optic gyroscopes (FOG) has gradually become the preferred choice for seismic rotation observation due to its insensitivity to translational motion, fully solid state and high sensitivity. In order to meet the demands of multi station observation network in seismic exploration, the FOG which is the core sensing element of the rotational seismometer, needs to have the characteristics of high sensitivity and low cost. In this paper, a budget-friendly dual-polarization FOG scheme based on a Lyot depolarizer is proposed, and the ports difference method is employed to suppress the short-time noise and improve the sensitivity. The experiment adopts 2km polarization maintaining fiber ring, and the two ports have stable output. After the difference of the two port signals, the self-noise over 0.03Hz~50Hz is reduced from 260nrads^-1Hz^-1/2 to 120nrads^-1Hz^-1/2. It shows that the rotational seismometer using this structure has low cost and high sensitivity, and has a good application prospect.

Citation Download Citation

Junzhu Wu, Dingfan Zhang, Chao Rong, Lanxin Zhu, Yuwen Cao, and Zhengbin Li "A low cost rotational seismometer for seismic exploration", Proc. SPIE 12507, Advanced Optical Manufacturing Technologies and Applications 2022; and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing (AOMTA and YSAOM 2022), 125072A (9 January 2023); https://doi.org/10.1117/12.2656429

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Fiber optic gyroscopes

Polarization

Signal detection

Signal processing

Gyroscopes

Ferroelectric materials

Modulation

Show All Keywords

Keywords/Phrases

Search In:

Publication Years