Temperature control type semiconductor laser device
AssigneeNEC Corporation
InventorHaruhito Shimizu
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Abstract
A Peltier cooler includes a plurality of Peltier elements, first and second ceramic substrates that are disposed to hold the Peltier elements through metallized electrodes formed inside the ceramic substrates and to electrically connect the Peltier elements in series, and first and second metal substrates respectively fixed to the first and second ceramic substrates by brazing, so as to hold them. The metal substrates are fixable to a substrate on which optical components are mounted and a semiconductor laser package, by yttrium-aluminum-garnet (YAG) laser welding. The YAG laser welding and the brazing operation eliminate the use of low-temperature solder, where creeps may occur.
Claims16
A temperature control semiconductor laser device comprising:
- electronic temperature control means comprising:
- a temperature control element for performing temperature control based on a control signal that is externally supplied at electrodes thereof;
- holding means for holding the temperature control element;
- and
- fixing means, coupled to the holding means by brazing, for fixing said holding means;
- a package having a bottom portion to which welding portions of the fixing means are fixed by welding;
- and
- a semiconductor laser that is subjected to the temperature control by the electronic temperature control means.
Dependencies are inferred from the claim text.