REPEATER, EXCITATION LIGHT SUPPLY DEVICE USED FOR THE SAME, AND EXCITATION LIGHT SUPPLY METHOD
First Claim
1. An excitation light supply device which supplies an excitation light, comprising:
- a light source unit which includes a plurality of excitation light source modules, each of which includes a light emitting element for emitting the excitation light and a monitor element for monitoring the excitation light of the light emitting element;
a distribution unit which combines the excitation lights from the plurality of excitation light source modules and distributes the combined excitation lights; and
a control unit which supplies a drive current flowing serially through the plurality of light emitting elements in a plurality of excitation modules.
1 Assignment
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Accused Products
Abstract
Even when some light emitting elements among the plurality of light emitting elements fail, a repeater, can be continuously operated. Means for solving the problems A light source unit 50 which includes a plurality of pumping light source modules 51 (51a to 51d) which include light emitting elements 52 (52a to 52d) for emitting an excitation light and monitor elements 53 (53a to 53d) for monitoring the excitation lights of the light emitting elements 52 (52a to 52d), respectively, a distribution unit 40 which combines the excitation lights from the plurality of pumping light source modules 51 (51a to 51d) and distributes it, and a control unit 60 which supplies a drive current flowing serially through the plurality of light emitting elements 52 (52a to 52d) in a plurality of excitation modules 51 (51a to 51d) are included.
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Citations
8 Claims
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1. An excitation light supply device which supplies an excitation light, comprising:
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a light source unit which includes a plurality of excitation light source modules, each of which includes a light emitting element for emitting the excitation light and a monitor element for monitoring the excitation light of the light emitting element; a distribution unit which combines the excitation lights from the plurality of excitation light source modules and distributes the combined excitation lights; and a control unit which supplies a drive current flowing serially through the plurality of light emitting elements in a plurality of excitation modules. - View Dependent Claims (2, 3, 4, 5)
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6. An excitation light supply method for supplying an excitation light, comprising the steps of:
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emitting the excitation light from a light emitting element and monitoring the excitation light by a monitor element at the time; combining the emitted excitation lights and distributing it by a distribution unit; detecting a sum of the detected output signals of the monitor elements as a monitor signal; and outputting a drive current supplied to the plurality of light emitting elements connected in series based on the monitor signal. - View Dependent Claims (7, 8)
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Specification