Fault tolerant laser diode package

Details Fault tolerant laser diode package Fault tolerant laser diode package

2007-10-23

2010-12-28

Van Roy, Tod T (Department: 2828)

Coherent light generators

Particular component circuitry

Having fault protection circuitry

C372S034000, C372S036000

Reexamination Certificate

active

07860136

ABSTRACT:
A laser diode package (10) according to the present invention is tolerant of short-circuit and open-circuit failures. The laser diode package (10) includes a laser diode bar (12), a forward-biased diode (14), a heat sink (18), and a lid (16) which may have fusible links (86). The laser diode bar (12) and the forward-biased diode (14) are electrically connected in parallel between the heat sink (18) and the lid (16). The emitting region of the laser diode bar (12) is aligned to emit radiation away from the forward-biased diode (14). Several packages can be stacked together to form a laser diode array (42). The forward-biased diode (14) allows current to pass through it when an open-circuit failure has occurred in the corresponding laser diode bar (12), thus preventing an open-circuit failure from completely disabling the array (42). The fusible links (86), if used on the lid (16), prevent damaged active regions (90) in a laser diode bar (12) from short-circuiting and drawing more electrical current than the other active regions (90).

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International Search Report dated Apr. 25, 2001 4 pages.

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