scholarly journals Accuracy-enhanced compensated optical fibre two-dimension microdisplacement transducer based on direct intensity modulation

1998 ◽  
Author(s):  
Miguel A. Morante Rabago ◽  
Adolfo Cobo ◽  
Jorge L. Arce-Diego ◽  
Jose Miguel Lopez-Higuera
Keyword(s):  
Optical Fibre ◽  
Intensity Modulation ◽  
Two Dimension

Analogue intensity modulation schemes for optical fibre HDTV transmission

1993 ◽  
Vol 140 (6) ◽  
pp. 417
Author(s):  
J.M. Senior ◽  
D.T. Lambert ◽  
D.W. Faulkner
Keyword(s):  
Optical Fibre ◽  
Intensity Modulation ◽  
Modulation Schemes

Single LED based dual wavelength referenced optical fibre sensor system using intensity modulation

1992 ◽  
Vol 24 (4) ◽  
pp. 187-192 ◽  
Author(s):  
J.M. Senior ◽  
G. Murtaza ◽  
A.I. Stirling ◽  
G.H. Wainwright
Keyword(s):  
Optical Fibre ◽  
Intensity Modulation ◽  
Dual Wavelength ◽  
Sensor System ◽  
Optical Fibre Sensor ◽  
Fibre Sensor

scholarly journals Application of Forced Modulation Function Mathematical Model in the Characteristic Research of Reflective Intensity Fibre Sensors

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Lihua Dai ◽  
Ben Wang ◽  
Xuemin Cheng ◽  
Qin Wang ◽  
Junchang Yu
Keyword(s):  
Mathematical Model ◽  
Optical Fibre ◽  
Diffuse Reflection ◽  
Specular Reflection ◽  
Numerical Aperture ◽  
Intensity Modulation ◽  
Distribution Model ◽  
Power Fluctuation ◽  
Modulation Characteristic ◽  
Modulation Function

Abstract In order to discuss the application and mode of the forced modulation function in a sensor, the optical fibre emphasis function was established by referring to the geometric method, the tilt factor and the shape factor of the reflecting surface. These were introduced for the first time, and the corresponding mathematical model was established. The method of numerical simulation is systematically studied and multimode optical fibre parameters (including optical fibre of axial spacing, optical fibre core diameter and numerical aperture) are adopted. The reflective surface inclination and shape factors on the RIM–FOS intensity modulation characteristics are studied according to the obtained light quasi-Gaussian distribution model, establishing a general three-intensity modulation function of fibre optic sensor. The results show that the intensity modulation characteristic of specular reflection is obviously better than that of the diffuse reflection surface, and the peak value of the modulation function is five times that of diffuse reflection. The intensity modulation characteristic decreases with increase in the roughness of the reflection surface. The system can not only complete the RIM–FOS characteristic simulation and characteristic testing functions, but can also start-up the test and not be affected by the ambient light interference and power fluctuation of the light source. The test stability is good with high repeatability.

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