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1. US20140368809 - Multi-wavelength DMD measurement apparatus and methods

Office United States of America
Application Number 14251869
Application Date 14.04.2014
Publication Number 20140368809
Publication Date 18.12.2014
Grant Number 10260990
Grant Date 16.04.2019
Publication Kind B2
IPC
G01N 21/00
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
G01M 11/00
GPHYSICS
01MEASURING; TESTING
MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
11Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
CPC
G01M 11/335
GPHYSICS
01MEASURING; TESTING
MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
11Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
30Testing of optical devices, constituted by fibre optics or optical waveguides
33with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face
335using two or more input wavelengths
G01M 11/338
GPHYSICS
01MEASURING; TESTING
MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
11Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
30Testing of optical devices, constituted by fibre optics or optical waveguides
33with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face
338by measuring dispersion other than PMD, e.g. chromatic dispersion
Applicants CORNING INCORPORATED
Inventors Xin Chen
Jason Edward Hurley
Ming-Jun Li
Richard Stephen Vodhanel
Agents Robert L. Carlson
Title
(EN) Multi-wavelength DMD measurement apparatus and methods
Abstract
(EN)

A differential mode delay (DMD) measurement system for an optical fiber is provided. The system includes an optical test fiber with a plurality of modes; a single mode light source that provides a continuous light wave signal to a modulator; and a pulse generator that provides an electrical pulse train signal to the modulator and a triggering signal to a receiver. The modulator is configured to generate a modulated optical test signal through the optical fiber based at least in part on the received light wave and pulse train signals, and the receiver is configured to receive the test signal transmitted through the fiber and evaluate the test signal based at least in part on the triggering signal. The system can be employed to create DMD waveform and centroid charts to obtain minEMBc bandwidth information for a fiber within a wavelength range.