DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Narrow bandwidth detection of vibration signature using fiber lasers

Abstract

The various technologies presented herein relate to extracting a portion of each pulse in a series of pulses reflected from a target to facilitate determination of a Doppler-shifted frequency for each pulse and, subsequently, a vibration frequency for the series of pulses. Each pulse can have a square-wave configuration, whereby each pulse can be time-gated to facilitate discarding the leading edge and the trailing edge (and associated non-linear effects) of each pulse and accordingly, capture of the central portion of the pulse from which the Doppler-shifted frequency, and ultimately, the vibration frequency of the target can be determined. Determination of the vibration velocity facilitates identification of the target being in a state of motion. The plurality of pulses can be formed from a laser beam (e.g., a continuous wave), the laser beam having a narrow bandwidth.

Inventors:
;
Issue Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1440531
Patent Number(s):
9964431
Application Number:
14/541,609
Assignee:
National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01B - MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS
G - PHYSICS G01 - MEASURING G01H - MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Resource Relation:
Patent File Date: 2014 Nov 14
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Moore, Sean, and Soh, Daniel B.S. Narrow bandwidth detection of vibration signature using fiber lasers. United States: N. p., 2018. Web.
Moore, Sean, & Soh, Daniel B.S. Narrow bandwidth detection of vibration signature using fiber lasers. United States.
Moore, Sean, and Soh, Daniel B.S. Tue . "Narrow bandwidth detection of vibration signature using fiber lasers". United States. https://www.osti.gov/servlets/purl/1440531.
@article{osti_1440531,
title = {Narrow bandwidth detection of vibration signature using fiber lasers},
author = {Moore, Sean and Soh, Daniel B.S.},
abstractNote = {The various technologies presented herein relate to extracting a portion of each pulse in a series of pulses reflected from a target to facilitate determination of a Doppler-shifted frequency for each pulse and, subsequently, a vibration frequency for the series of pulses. Each pulse can have a square-wave configuration, whereby each pulse can be time-gated to facilitate discarding the leading edge and the trailing edge (and associated non-linear effects) of each pulse and accordingly, capture of the central portion of the pulse from which the Doppler-shifted frequency, and ultimately, the vibration frequency of the target can be determined. Determination of the vibration velocity facilitates identification of the target being in a state of motion. The plurality of pulses can be formed from a laser beam (e.g., a continuous wave), the laser beam having a narrow bandwidth.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {5}
}

Works referenced in this record:

Stable passively Q-switched and gain-switched Yb-doped all-fiber laser based on a dual-cavity with fiber Bragg gratings
journal, January 2013


Applications for remote laser vibration sensing
conference, December 2008


Vibration imagery of remote objects
conference, December 2002


Fibre laser Doppler vibrometry system for target recognition
conference, February 2005