1-cm spatial resolution with large dynamic range in strain distributed sensing by Brillouin optical correlation domain reflectometry based on intensity modulation

2012 ◽  
Author(s):  
Sitthipong Manotham ◽  
Masato Kishi ◽  
Zuyuan He ◽  
Kazuo Hotate
Keyword(s):  
Spatial Resolution ◽  
Dynamic Range ◽  
Intensity Modulation ◽  
Distributed Sensing ◽  
Large Dynamic Range ◽  
Optical Correlation

scholarly journals Brillouin Distributed Fiber Sensors: An Overview and Applications

2012 ◽  
Vol 2012 ◽  
pp. 1-17 ◽  
Author(s):  
C. A. Galindez-Jamioy ◽  
J. M. López-Higuera
Keyword(s):  
Spatial Resolution ◽  
Real World ◽  
Dynamic Range ◽  
Large Dynamic Range ◽  
Fiber Sensors ◽  
Real World Applications ◽  
Technical Challenges ◽  
Distributed Fiber Sensors

A review focused on real world applications of Brillouin distributed fiber sensors is presented in this paper. After a brief overview of the theoretical principles, some works to face the two main technical challenges (large dynamic range and higher spatial resolution) are commented. Then an overview of some real and on-field applications is done.

scholarly journals Distributed Strain Measurement Using Power-Based Brillouin Sensor with Three Folded Dynamic Range

Proceedings ◽  
2019 ◽  
Vol 15 (1) ◽  
pp. 26
Author(s):  
Lee ◽  
Noda ◽  
Mizuno ◽  
Nakamura
Keyword(s):  
Spatial Resolution ◽  
Time Domain ◽  
Strain Measurement ◽  
Dynamic Range ◽  
Optical Correlation ◽  
Trade Off ◽  
Noise Floor ◽  
The Cost ◽  
Distributed Strain

We clarify that, unlike time-domain techniques, slope-assisted Brillouin optical correlation-domain reflectometry has a trade-off relation between the strain dynamic range and the spatial resolution. This trade-off is shown to be caused by its unique bell-shaped noise floor, which is inherently unavoidable in correlation-domain systems. Subsequently, we experimentally show that, at the cost of lowered spatial resolution, the strain dynamic range can be 3 times wider than the previously reported value.

scholarly journals Optofluidic laser for dual-mode sensitive biomolecular detection with a large dynamic range

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
Xiang Wu ◽  
Maung Kyaw Khaing Oo ◽  
Karthik Reddy ◽  
Qiushu Chen ◽  
Yuze Sun ◽  
...  
Keyword(s):  
Dynamic Range ◽  
Large Dynamic Range ◽  
Dual Mode ◽  
Biomolecular Detection

TREMOR: A Wireless MEMS Accelerograph for Dense Arrays

2005 ◽  
Vol 21 (1) ◽  
pp. 91-124 ◽  
Author(s):  
John R. Evans ◽  
Robert H. Hamstra ◽  
Christoph Kündig ◽  
Patrick Camina ◽  
John A. Rogers
Keyword(s):  
Spatial Resolution ◽  
Dynamic Range ◽  
Strong Motion ◽  
The United States ◽  
Companion Paper ◽  
Low Noise ◽  
Practical Reasons ◽  
Wireless Internet ◽  
Urban Centers ◽  
Strong Motion Network

The ability of a strong-motion network to resolve wavefields can be described on three axes: frequency, amplitude, and space. While the need for spatial resolution is apparent, for practical reasons that axis is often neglected. TREMOR is a MEMS-based accelerograph using wireless Internet to minimize lifecycle cost. TREMOR instruments can economically augment traditional ones, residing between them to improve spatial resolution. The TREMOR instrument described here has dynamic range of 96 dB between ±2 g, or 102 dB between ±4 g. It is linear to <1% of full scale (FS), with a response function effectively shaped electronically. We developed an economical, very low noise, accurate (<1%FS) temperature compensation method. Displacement is easily recovered to 10-cm accuracy at full bandwidth, and better with care. We deployed prototype instruments in Oakland, California, beginning in 1998, with 13 now at mean spacing of ∼3 km—one of the most densely instrumented urban centers in the United States. This array is among the quickest in returning (PGA, PGV, Sa) vectors to ShakeMap, ∼75 to 100 s. Some 13 events have been recorded. A ShakeMap and an example of spatial variability are shown. Extensive tests of the prototypes for a commercial instrument are described here and in a companion paper.

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