Optical fiber characteristic measurement
First Claim
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1. A single mode optical fiber characteristic measuring device comprising:
- a set stage for setting an optical fiber under measurement on a carrier andmeasuring stages for measuring characteristics of said optical fiber on said carrier arranged successively in the direction of movement of said carrier, each measuring stage having optical measuring systems incident and emergent ends, said carrier on which said optical fiber under measurement being adapted to be moved to said measuring stages successively, and at each of said measuring stages the two ends of said optical fiber under measurement being aligned with said optical measuring system incident and emergent ends, respectively, so that a characteristic measurement assigned to said stage is performed,holders for holding the two ends of an optical fiber under measurement, and a first optical fiber bending unit adapted to accurately bend said optical fiber with a first radius of curvature in such a manner that the bend corresponds to one circumference of a circle having said first radius of curvature, to control the propagation mode in said optical fiber being provided on said carrier, anda second optical fiber bending unit adapted to bend said optical fiber under measurement with a second radius of curvature smaller than said first radius of curvature in such a manner that the bend corresponds to more than one circumference of the circle having said second radius of curvature is provided on said carrier or at a predetermined measuring stage or stages.
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Abstract
An optical fiber characteristic measuring device for automatically measuring, at successive measuring stages, various characteristics of optical fiber samples. Each measuring stage has optical system incident and emergent ends. An optical fiber sample is set in a carrier which moves from measuring stage to measuring stage. At each stage the set fiber sample is coupled to the incident and emergent ends of the stage and automatically subjected to the measurement to which the stage is dedicated. Bending units provide a desired degree of curvature to the fiber sample under test to control light propagation therein.
16 Citations
24 Claims
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1. A single mode optical fiber characteristic measuring device comprising:
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a set stage for setting an optical fiber under measurement on a carrier and measuring stages for measuring characteristics of said optical fiber on said carrier arranged successively in the direction of movement of said carrier, each measuring stage having optical measuring systems incident and emergent ends, said carrier on which said optical fiber under measurement being adapted to be moved to said measuring stages successively, and at each of said measuring stages the two ends of said optical fiber under measurement being aligned with said optical measuring system incident and emergent ends, respectively, so that a characteristic measurement assigned to said stage is performed, holders for holding the two ends of an optical fiber under measurement, and a first optical fiber bending unit adapted to accurately bend said optical fiber with a first radius of curvature in such a manner that the bend corresponds to one circumference of a circle having said first radius of curvature, to control the propagation mode in said optical fiber being provided on said carrier, and a second optical fiber bending unit adapted to bend said optical fiber under measurement with a second radius of curvature smaller than said first radius of curvature in such a manner that the bend corresponds to more than one circumference of the circle having said second radius of curvature is provided on said carrier or at a predetermined measuring stage or stages. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification