TY - JOUR
T1 - Demodulation of polarimetric fibre laser ultrasonic sensor with intensity noise cancellation
AU - Wang, Jianfei
AU - Flockhart, Gordon M. H.
AU - Uttamchandani, Deepak
N1 - © Copyright 2019 | Optica Publishing Group. All rights reserved, including rights for text and data mining and training of artificial technologies or similar technologies.
J. Wang, G. Flockhart, and D. Uttamchandani, "Demodulation of Polarimetric Fiber Laser Ultrasonic Sensor With Intensity Noise Cancellation," J. Lightwave Technol. 37, 4872-4880 (2019). https://opg.optica.org/jlt/abstract.cfm?URI=jlt-37-18-4872
PY - 2019/6/27
Y1 - 2019/6/27
N2 - In this paper, the influences of the relative intensity noise (RIN), in particular the relaxation oscillation noise, of an erbium distributed feedback (DFB) fibre laser has been investigated theoretically and experimentally for use a polarimetric ultrasonic sensor. We show that the relaxation oscillation noise and the ultrasonic signal both induce modulation sidebands on the polarization beat frequency of the DFB laser ultrasonic sensor. We present a novel demodulation algorithm for the polarimetric DFB fibre laser ultrasonic sensor, which can effectively eliminate the influences of the intensity noise and slowly varying drift of the polarization beat frequency.
AB - In this paper, the influences of the relative intensity noise (RIN), in particular the relaxation oscillation noise, of an erbium distributed feedback (DFB) fibre laser has been investigated theoretically and experimentally for use a polarimetric ultrasonic sensor. We show that the relaxation oscillation noise and the ultrasonic signal both induce modulation sidebands on the polarization beat frequency of the DFB laser ultrasonic sensor. We present a novel demodulation algorithm for the polarimetric DFB fibre laser ultrasonic sensor, which can effectively eliminate the influences of the intensity noise and slowly varying drift of the polarization beat frequency.
KW - ultrasonic sensor
KW - fibre laser
KW - intensity noise
UR - https://www.osapublishing.org/jlt/
M3 - Article
SN - 0733-8724
VL - 37
SP - 4872
EP - 4880
JO - Journal of Lightwave Technology
JF - Journal of Lightwave Technology
IS - 18
ER -