Title :
DIC imaging of an optical fiber Bragg grating
Author :
Dragomir, N.M. ; Baxter, G.W. ; Collins, S.F. ; Farrell, P.M. ; Stevenson, A.J. ; Garchev, D.D. ; Roberts, A.
Author_Institution :
Opt. Technol. Res. Lab., Victoria Univ., Melbourne, Vic., Australia
Abstract :
Summary form only given. In this presentation, a direct, non-destructive and highly accurate method based on Nomarski differential interference contrast (DIC) microscopy method is considered for investigating FBGs. The Nomarski DIC microscopy is a method that allows the enhancement of the contrast of phase structures. The method relies on the interference of a pair of wave fronts to generate contrast and, as a consequence, it is possible to reach the limit of resolution of the microscope while, at the same time, limiting the depth field to a very narrow range.
Keywords :
Bragg gratings; image resolution; light interference; measurement errors; optical fibre testing; optical images; optical microscopy; Nomarski differential interference contrast microscopy; accurate method; depth field; optical fiber Bragg grating; phase gradient; phase structures contrast enhancement; predominately phase information; refractive index; structural information; transparent object; weakly absorbing objects; Australia; Bragg gratings; Fiber gratings; Microscopy; Optical fibers; Optical imaging; Optical refraction; Optical scattering; Optical surface waves; Optical variables control;
Conference_Titel :
Optical Fiber Communication Conference and Exhibit, 2002. OFC 2002
Print_ISBN :
1-55752-701-6
DOI :
10.1109/OFC.2002.1036659
