Experimental investigation of the modulation phase-shift method for the measure of the chromatic dispersion in a single-mode fiber coiled on a covered spool

2005 ◽  
Vol 48 (1) ◽  
pp. 174-178 ◽  
Author(s):  
L. Cherbi ◽  
M. Mehenni ◽  
R. Aksas
Keyword(s):  
Experimental Investigation ◽  
Phase Shift ◽  
Chromatic Dispersion ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Shift Method ◽  
Phase Shift Method ◽  
Modulation Phase

Innovative implementation of the phase-shift method for field measurement of chromatic dispersion

2002 ◽  
Author(s):  
Normand Cyr ◽  
Francois Babin ◽  
Robert Baribault ◽  
Francis Audet ◽  
Andre Girard
Keyword(s):  
Phase Shift ◽  
Field Measurement ◽  
Chromatic Dispersion ◽  
Shift Method ◽  
Phase Shift Method

High Precision Fiber Length Measurement Technique Based on Modulation Phase Shift Method

2016 ◽  
Vol 45 (7) ◽  
pp. 70706004
Author(s):  
朱兴邦 ZHU Xing-bang ◽  
孙权社 SUN Quan-she ◽  
郑祥亮 ZHENG Xiang-liang ◽  
韩忠 HAN Zhong ◽  
刘志明 LIU Zhi-ming
Keyword(s):  
Phase Shift ◽  
High Precision ◽  
Measurement Technique ◽  
Fiber Length ◽  
Length Measurement ◽  
Shift Method ◽  
Phase Shift Method ◽  
Modulation Phase

A HIGHLY ACCURATE ULTRASONIC MEASUREMENT SYSTEM FOR TREMOR USING BINARY AMPLITUDE-SHIFT-KEYING AND PHASE-SHIFT METHOD

2003 ◽  
Vol 15 (02) ◽  
pp. 61-67 ◽  
Author(s):  
MENG-HSIANG YANG ◽  
K. N. HUANG ◽  
C. F. HUANG ◽  
S. S. HUANG ◽  
M. S. YOUNG
Keyword(s):  
Phase Shift ◽  
Measurement System ◽  
Low Cost ◽  
Phase Shifts ◽  
Ultrasonic Waves ◽  
Shift Method ◽  
Narrow Bandwidth ◽  
Shift Keying ◽  
Modulation Signal ◽  
Phase Shift Method

A highly accurate Binary Amplitude-Shift-Keyed (BASK) ultrasonic tremor measurement system for use in isothermal air is developed. In this paper, we present a simple but efficient algorithm based upon phase shifts generated by three ultrasonic waves of different frequencies. By the proposed method, we can conduct larger range measurement than the phase-shift method and also get higher accuracy compared with the time-of-flight (TOF) method. Our microcomputer-based system includes two important parts. One of which is BASK modulation signal generator. The other is a phase meter designed to record and compute the phase shifts of the three different frequencies and the result motion is then sent to either an LCD for display or a PC for calibration. Experiments are done in the laboratory using BASK modulation for the frequencies of 200 Hz and 1 kHz with a 40 kHz carrier. The measurement accuracy of this measurement system in the reported experiments is within +/- 0.98 mm. The main advantages of this ultrasonic tremor measurement system are high resolution, narrow bandwidth requirement, low cost, and easy to be implemented.

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