Measuring a characteristic of a multimode optical fiber
AssigneeSchlumberger Technology Corporation
InventorsDylan Davies, Arthur H. Hartog, Graeme Hilton, Gareth P. Lees
Life of this patent
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Abstract
To measure a characteristic of a multimode optical fiber, a light pulse source produces a light pulse for transmission into the multimode optical fiber. A spatial filter passes a portion of Brillouin backscattered light from the multimode optical fiber that is responsive to the light pulse. Optical detection equipment detects the portion of the Brillouin backscattered light passed by the spatial filter.
Claims23
An apparatus to measure a characteristic of a multimode optical fiber, comprising:
- a light pulse source to produce a light pulse for transmission into the multimode optical fiber;
- an optical local oscillator to produce light;
- a spatial filter to pass a portion of Brillouin backscattered light from the multimode optical fiber that is responsive to the light pulse;
- a beam combiner to combine the light from the optical local oscillator and the Brillouin backscattered light portion into a combined light;
- and
- optical detection equipment to detect the combined light.
A method of measuring a characteristic of a multimode optical fiber, comprising:
- transmitting a light pulse into the multimode optical fiber;
- providing a local oscillator light signal;
- passing Brillouin backscattered light from the multimode optical fiber that is responsive to the light pulse through a spatial filter, wherein a portion of the Brillouin backscattered light is passed through the spatial filter;
- combining the local oscillator light signal with the Brillouin backscattered light portion to form a combined light signal;
- and
- directing the combined light signal to optical detection equipment for processing.
A system comprising:
- a multimode optical fiber;
- a light pulse source to produce a light pulse for transmission into the multimode optical fiber;
- an optical local oscillator to produce light;
- a spatial filter to pass a portion of Brillouin backscattered light from the multimode optical fiber that is responsive to the light pulse;
- a beam combiner to combine the light from the optical local oscillator and the Brillouin backscattered light portion into a combined light;
- and
- optical detection equipment to detect the combined light.
Dependencies are inferred from the claim text.