Abstract

The design of a noncontact fiber-optic sensor is described for the detection of acoustic emission for structural integrity monitoring in high-temperature power plant applications. The sensor is based on a Sagnac interferometer and produces an output proportional to target velocity, without the need for active phase stabilization. It is inherently insensitive to low-frequency perturbations of the instrument or the target and incorporates an environmentally insensitive downlead, which may be of arbitrary length. It is shown that the sensor is capable of meeting the specifications for structural integrity monitoring of high-temperature power plant components based on acoustic emission detection and has a velocity resolution of 50 nm s-1 Hz-1/2.

© 1997 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Characteristics of transverse-stress-induced phase change through a distinct dual-mode fiber in a Sagnac loop

Saba N. Khan, Sudip Kr. Chatterjee, Kajal Mondal, and Partha Roy Chaudhuri
J. Opt. Soc. Am. A 30(5) 1013-1020 (2013)

High-birefringence fiber loop mirrors and their applications as sensors

Yange Liu, Bo Liu, Xinhuan Feng, Weigang Zhang, Guang Zhou, Shuzhong Yuan, Guiyun Kai, and Xiaoyi Dong
Appl. Opt. 44(12) 2382-2390 (2005)

All-fiber acoustic particle velocity sensor based on graphene-coated four-core fiber

Ran Gao and Xiangjun Xin
Opt. Lett. 44(18) 4439-4442 (2019)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (17)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription