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Class Information
Number: 356/73.1
Name: Optics: measuring and testing > For optical fiber or waveguide inspection
Description: Subject matter wherein there is means to examine one or more transparent elongated structures (e.g., rods, fibers, or pipes) which are used to transmit light rays from one point to another within the confines of their outer surface, and involving internal reflections or modal transmission.

Patents under this class:

Patent Number Title Of Patent Date Issued
5673133 Phase synchronization system Sep. 30, 1997
5673351 Method and apparatus for inducing a temporary localized transmission loss in a telecommunications cable Sep. 30, 1997
5671308 Optical waveguide having diffraction grating area and method of fabricating the same Sep. 23, 1997
5668627 Optical line testing device and method for automatically and efficiently measuring properties of the optical line Sep. 16, 1997
5661553 Method of detecting variation in the diameter of an optical fiber and optical fiber fabrication method Aug. 26, 1997
5661554 Method of and device for measuring the nonlinear refractive index in a single mode optical fibre Aug. 26, 1997
5657131 Alignment and lighting system and method for aligning and lighting an object for an inspection system that contactlessly measures an offset of a central feature of the object Aug. 12, 1997
5654793 Method and apparatus for high resolution measurement of very low levels of polarization mode dispersion (PMD) in single mode optical fibers and for calibration of PMD measuring instruments Aug. 5, 1997
5652715 Methods for reducing noise in an electrical signal Jul. 29, 1997
5648845 Apparatus for verifying the performance of optical fibre measurement equipment Jul. 15, 1997
5646396 Optical position system Jul. 8, 1997
5644389 Method for measuring distance between reflection points along light transmission line and reflectance thereof Jul. 1, 1997
5633708 Apparatus for measuring refractive index May. 27, 1997
5633709 Propagation delay time measuring device May. 27, 1997
5631759 Automated system, and corresponding method, for measuring receiver pulse width distortion of electro-optic modules May. 20, 1997
5625450 Apparatus for measuring connection loss and reflection attenuation of optical fiber cord Apr. 29, 1997
5623336 Method and apparatus for analyzing optical fibers by inducing Brillouin spectroscopy Apr. 22, 1997
5623567 Method for making an evanescent field coupler Apr. 22, 1997
5621517 Method and apparatus for testing fiber optic telephone lines Apr. 15, 1997
5621518 Optical time domain reflectometer (OTDR) with improved dynamic range and linearity Apr. 15, 1997
5619320 Method and apparatus for measuring dispersion zero along an optical fiber Apr. 8, 1997
5619321 Method of and device for measuring the Kerr non-linearity coefficient in a single mode optical fiber Apr. 8, 1997
5617200 Pulse method for measurement of relative secondary path intensities in optical waveguide systems Apr. 1, 1997
5617237 Automated system, and corresponding method, for measuring transmitter extinction ratio of electro-optic modules Apr. 1, 1997
5615011 Interferometric system for the detection and location of reflector faults of light-guiding structures Mar. 25, 1997
5612780 Device for detecting light emission from optical fiber Mar. 18, 1997
5596440 Method and apparatus for analyzing the characteristics of an optical circuit Jan. 21, 1997
5592282 Suppression of stimulated scattering in optical time domain reflectometry Jan. 7, 1997
5592284 Single connection automated bi-directional fiberoptic attenuation measurement system Jan. 7, 1997
5592577 Optical transmission line enabling definition of a fault point and a method for defining the fault point Jan. 7, 1997
5589933 Optical fiber test instrument with mechanically positioned attenuator Dec. 31, 1996
5579145 Automated system and corresponding method for measuring receiver time delay of electro-optic modules Nov. 26, 1996
5576871 Method for optical communications Nov. 19, 1996
5572016 Photoluminescence built-in-test for optically initiated systems Nov. 5, 1996
5572313 Determination of angular offset between optical fibers having optical, axial asymmetry and alignment and splicing of such fibers Nov. 5, 1996
5570176 Apparatus for converting a multimeter to an optical power meter Oct. 29, 1996
5570217 Positionally independent application of an OTDR technique based on correlation in a branched optical fibre network during operation Oct. 29, 1996
5567933 Optical fiber detection system with disturbance and positive cut-loop detection capabilities Oct. 22, 1996
5557400 Multiplexed sensing using optical coherence reflectrometry Sep. 17, 1996
5557401 Optical masking apparatus Sep. 17, 1996
5552881 Method and apparatus for scanning a fiber optic network Sep. 3, 1996
5552882 Methods of and apparatus for calibrating precisely spaced multiple transverse holographic gratings in optical fibers Sep. 3, 1996
5551967 Method for controlling fiber diameter during drawing Sep. 3, 1996
5548432 Passive optical network switchable between an operational mode and a diagnostic mode Aug. 20, 1996
5545517 Selective metal ion detection using a photoluminescent indicator binding to a macromolecule-metal ion complex Aug. 13, 1996
5546180 Apparatus for inserting light signals into, or receiving light signals from, one of a series of optical paths and usuable as optical time domain reflectometry apparatus Aug. 13, 1996
5543912 Reflectometry of an optical waveguide using a low coherence reflectometer Aug. 6, 1996
5541725 Method and device for testing a plurality of optical waveguides Jul. 30, 1996
5534994 Optical waveguide spectral attenuation using an OTDR Jul. 9, 1996
5535139 Portable fiber optic splitter tool for multimode optical fiber cable link Jul. 9, 1996

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