Temperature compensation for transmission between nodes coupled by a unidirectional fiber ring
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Abstract
Transmissions over a unidirectional optical fiber coupling multiple nodes are compensated for temperature-induced effects. A round-trip delay time is determined for a signal sent from a first node to travel around the unidirectional optical fiber loop and be received back at the first node. That measured round-trip delay time is then used to account for temperature-induced effects on signal transmissions over the unidirectional optical fiber loop. This temperature compensation is particularly beneficial in applications that require a high level of timing accuracy.
50 Citations
52 Claims
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1-26. -26. (canceled)
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27. A method for monitoring transmissions over a unidirectional optical fiber loop coupling multiple nodes, comprising the steps of:
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measuring a round trip delay time for a signal sent from a first node to travel around the unidirectional optical fiber loop and be received at the first node; and
,using the measured round trip delay time to account for temperature induced affects on signal transmissions over the unidirectional optical fiber loop. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 38, 39)
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40. Apparatus for use in monitoring transmissions over a unidirectional optical fiber loop coupling multiple nodes, comprising electronic circuitry operative to:
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measure a round trip delay time for a signal sent from a first node to travel around the unidirectional optical fiber loop and be received at the first node; and
,account for temperature induced affects on signal transmissions over the unidirectional optical fiber loop using the measured round trip delay time. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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Specification