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).