Acousto-optic control of speckle contrast in multimode fibers with a cylindrical piezoelectric transducer oscillating in the radial direction

W Ha, S Lee, Y Jung, JK Kim, K Oh - Optics express, 2009 - opg.optica.org
… at the output of multimode fibers (MMFs) using a cylindrical piezoelectric transducer (PZT)
vibrating in … intensity modulation were achieved over the wound fiber to result in time-averaged …

Speckle reduction in near-field image of multimode fiber with a piezoelectric transducer

WS Ha, SJ Lee, KH Oh, YM Jung… - Journal of the Optical …, 2008 - opg.optica.org
… output of a 50 μm graded index multimode fiber using a short cylindrical piezoelectric
transducer (PZT) vibrating in the radial direction. The fiber was coiled as tightly as possible around …

Speckle reduction in multimode fiber with a piezoelectric transducer in radial vibration for fiber laser marking and display applications

W Ha, S Lee, Y Jung, J Kim… - Fiber Lasers V: Technology …, 2008 - spiedigitallibrary.org
… reduce far-field speckle noise in multimode fiber with a short cylindrical piezoelectric transducer
(PZT) vibrating in radial direction. In this study, the fiber was coiled as tightly as possible …

Speckle characterization in multimode fibers for sensing applications

L Rodriguez-Cobo, M Lomer… - Speckle 2012: V …, 2012 - spiedigitallibrary.org
… are used in this work due to its excellent flexibility and adaptability to build sensor heads. …
cylindrical piezoelectric transducer (PZT) vibrating in radial direction. The multimode fiber was …

Reduction of speckle contrast in multimode fibers using piezoelectric vibrator

Y Fujimaki, H Taniguchi - Laser Resonators, Microresonators …, 2014 - spiedigitallibrary.org
… Flexible layout of optical system can be realized using multimode fiber. A technique is
reported in Ref. 2, in which a multimode fiber is coiled on a cylindrical piezoelectric transducer to …

A voltage sensor based on a singlemode–multimode–singlemode fiber structure

AM Hatta, Y Semenova, G Rajan… - Microwave and Optical …, 2010 - Wiley Online Library
… In some optical fiber voltage sensors, piezoelectric (PZT) … The optical fiber sensor is securely
attached to the PZT so that … in the PZT and thus in the optical fiber sensor. By using the …

Multipoint laser ultrasound transmitter using single-multi-single mode fiber structures

S Zhou, C Zhou, J Tian, Y Yao - Sensors and Actuators A: Physical, 2024 - Elsevier
… on the piezoelectric effect and laser ultrasound. Traditional … found that the length of the
multimode fiber can be adjusted to … Specifically, increasing the length of the multimode fiber leads …

NDE of smart structures using multimode fiber optic vibration sensor

JS Leng, A Asundi - NDT & E International, 2002 - Elsevier
… speckle of a multimode optical fiber is described. A multimode optical fiber with a diameter of
… sensitivity and a better dynamic range when compared to the standard piezoelectric sensor. …

[PDF][PDF] Detection and wavelet analysis of acoustic emission signal from partial discharge captured by multimode optical fiber and piezoelectric sensors in insulation oil

MM Yaacob, MA Alsaedi, RA Rahman… - … Journal of Physical …, 2013 - academicjournals.org
… of two acoustic sensors multimode fiber optical (FO) and piezoelectric (PZT) sensor have been
… Both the sensors were placed in an oil tank in which optical breakdown was produced by …

Wearable multimode sensors with amplified piezoelectricity due to the multi local strain using 3D textile structure for detecting human body signals

S Ahn, Y Cho, S Park, J Kim, J Sun, D Ahn, M Lee… - Nano Energy, 2020 - Elsevier
… The materials used in the piezoelectric sensor are mainly classified into … fibers along the
weaving direction of the 3D textiles, categorized into coursewise and walewise through optical