Broadband light source system and method and light source combiner
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United States of America Patent
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May 27, 2003
Grant Date -
Sep 19, 2002
app pub date -
Mar 16, 2001
filing date -
Mar 16, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A system for generating a source of broadband light includes, in one embodiment, a plurality of light sources such as SLEDs or edge-emitting luminescent diodes (ELEDs) whose outputs are combined in at least one combiner unit. The combiner unit combines light from a plurality of light sources into a single mode output beam. In one embodiment, the single mode output beam is the input beam to an interferometer for optical coherence tomography. In another embodiment, a time-gain compensation (TGC) unit is in communication with the plurality of light sources. The TGC unit controls the plurality of light sources independently and simultaneously. In one embodiment, control of the plurality of light sources by the TGC unit is in synchrony with the variation in optical delay in the reference arm of the interferometer. The TGC unit may feature, for example, a modulated current regulator.
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