Reliable diode laser stack
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United States of America Patent
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Jul 27, 2004
Grant Date -
Nov 27, 2003
app pub date -
May 22, 2002
filing date -
May 22, 2002
priority date (Note) -
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Abstract
A laser diode stack includes a serially connected plurality of laser diode bars mounted on heat sinks. Connected in parallel with each laser diode is a respective safety diode which has a higher band gap than its associated laser diode. The safety diode remains nonconductive so long as the associated laser diode is operational. Should the laser diode fail in an open circuit condition, the respective safety diode responds to the open circuit voltage to restore continuity to the serially connected chan of laser diodes.
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