Title :
Noncontact calibration of optical fiber cladding diameter using exact scattering theory
Author :
Van der Mark, Martin B. ; Bosselaar, Lex
Author_Institution :
Philips Res. Lab., Eindhoven, Netherlands
fDate :
1/1/1994 12:00:00 AM
Abstract :
A new, contactless and nondestructive method for measuring the diameter of an optical fiber is described which has 10 nm sensitivity. In this method, polarized laser light is backscattered from the fiber, perpendicular to its axis. The measured intensity shows excellent agreement with calculations from an exact scattering theory, and reveals both the refractive index and diameter of the fiber. The high sensitivity of this method results from the intrinsic interferometric properties of the fiber itself, and depends on the wavelength of the coherent light source only. If the fiber´s circumference is circular, the high sensitivity of this method leads to an absolute calibration accuracy of 10 nm of the fiber diameter
Keywords :
backscatter; calibration; diameter measurement; light scattering; optical fibre testing; optical fibre theory; refractive index measurement; backscattering; calibration accuracy; circular circumference; coherent light source wavelength; contactless method; diameter measurement; exact scattering theory; intrinsic interferometric properties; noncontact calibration; nondestructive method; optical fiber cladding diameter; polarized laser light; refractive index; sensitivity; Calibration; Fiber lasers; Laser theory; Light scattering; Optical fiber polarization; Optical fiber theory; Optical fibers; Optical scattering; Refractive index; Wavelength measurement;
Journal_Title :
Lightwave Technology, Journal of
