Spectral interference between two beams in a Michelson interferometer and modulation of the spectrum of a low-coherence source

1998 ◽  
Author(s):  
Petr Hlubina
Keyword(s):  
Michelson Interferometer ◽  
Spectral Interference ◽  
Low Coherence

scholarly journals Interférométrie et réflectométrie haute résolution en lumière incohérente : modélisation d'interférogrammes

2000 ◽  
Vol 77 (9) ◽  
pp. 685-692
Author(s):  
C Lupi ◽  
E Tanguy ◽  
C Boisrobert ◽  
F de Fornel
Keyword(s):  
Optical Properties ◽  
Spatial Resolution ◽  
White Light ◽  
Near Infrared ◽  
Michelson Interferometer ◽  
Optical Power ◽  
Source Spectrum ◽  
Optical Fibres ◽  
Low Coherence ◽  
Haute Résolution

We report on low-coherence, near-infrared reflectometry applied to optical fibres, waveguides, and coupling devices to detect the echoes due to reflective propagation defects and measure their optical properties — losses or attenuation, dispersion. This technique, based on interferometry, leads to the highest spatial resolution and the lowest detectable reflected optical power. We scan the reference arm of our Michelson interferometer around the ``white light fringe'' position and obtain interferograms whose envelopes and fringes contain information on the light source spectrum and the reflectivity of the test arm. Theoretical and experimental results are compared. Examples are given and show that numerical simulations are needed to understand the signatures of the reflectors and get to their physical structures.

scholarly journals Acousto-optic filtration in low-coherence spectral-domain interferometry

2021 ◽  
Vol 2127 (1) ◽  
pp. 012034
Author(s):  
L Burmak
Keyword(s):  
Michelson Interferometer ◽  
Depth Resolution ◽  
Measurement Range ◽  
Spectral Domain ◽  
Interference Signal ◽  
Optical Coherence ◽  
Basic Principles ◽  
Depth Measurement ◽  
Low Coherence ◽  
Low Coherence Interferometry

Abstract The basic principles of measurements in spectral-domain low coherence interferometry (optical coherence tomography, optical coherence microscopy) based on acousto-optic filtration are discussed. Relations for extracting information about sample’s spatial structure from a series of spectral interference images acquired with spectral tuning are given. The implementation of measurements in spectral domain using acousto-optic filtration is considered. The effect of the acousto-optic filter characteristics on depth measurement range and depth resolution is estimated. The results of modelling of the interference signal and experimental data obtained in the scheme with acousto-optic filtration of interfering beams at the output of Michelson interferometer are presented.

Remote Internal Diameter Measurement of Ring Gauge Based on a Low-Coherence Tandem Scheme

2012 ◽  
Vol 516 ◽  
pp. 533-538
Author(s):  
Dong Wei ◽  
Nan Wu ◽  
Kiyoshi Takamasu ◽  
Hirokazu Matsumoto
Keyword(s):  
Measurement Method ◽  
Michelson Interferometer ◽  
Standard Uncertainty ◽  
Internal Diameter ◽  
Diameter Measurement ◽  
Network Systems ◽  
Present Measurement ◽  
Transmission Grating ◽  
Low Coherence ◽  
Relative Standard

A novel internal diameter measurement method based on a low-coherence tandem scheme is firstly demonstrated. From operational analysis, it is understood that a low-coherence tandem scheme can be served for internal diameter evaluation by using a combination of a transmission grating and a ring gauge instead of a classical Michelson interferometer to store and transmit the internal diameter information. As a result of the experiment, in the present experimental environment, diameter measurement of several millimetres with a relative standard uncertainty of several micrometres was performed. Taken together, these results suggest that the present measurement method is expected to be used as a powerful remote internal diameter calibration tool for next-generation calibration network systems.

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