Temperature-controlling laser diode assembly

A laser diode assembly, comprising:

• a base member;
• a Peltier device mounted on said base member;
• a carrier mounted on said Peltier device;
• a laser diode chip fixedly mounted on said carrier;
• a thermistor fixedly mounted on said carrier;
• a terminal extended through said base member for connecting said thermistor to an external circuit;
• a relay block provided between said thermistor and said terminal, said relay block comprising a block body formed of an electrical insulator having good heat conductivity and a metal film formed on said relay block, said relay block being in contact with said carrier;
• first connecting means for connecting said thermistor to said relay block;
• second connecting means for connecting said relay block to said terminal;
• a cap fixed to said base member for sealingly enclosing said Peltier device, said carrier, said laser diode chip, said thermistor, and said relay block;
• and
• means for detecting a resistance of said thermistor and controlling a driving current for said Peltier device contacting with said carrier to maintain said resistance at a constant value.

A laser diode assembly, comprising:

• a base member;
• a Peltier device mounted on said base member;
• a carrier mounted on said Peltier device;
• a laser diode chip fixedly mounted on said carrier;
• a thermistor fixedly mounted on said carrier;
• a terminal extended through said base member for connecting said thermistor to an external circuit;
• a relay block provided between said thermistor and said terminal, said relay block comprising a block body formed of a heat insulating material and a metal film formed on said block body, said relay block being in contact with said carrier;
• first connecting means for connecting said thermistor to said relay block;
• second connecting means for connecting said relay block to said terminal;
• a cap fixed to said base member for sealingly enclosing said Peltier device, said carrier, said laser diode chip, said thermistor, and said relay block;
• and
• means for detecting a resistance of said thermistor and controlling a driving current for said Peltier device contacting with said carrier to maintain said resistance at a constant value.

A laser diode assembly, comprising:

• a base member;
• a Peltier device mounted on said base member;
• a carrier mounted on said Peltier device;
• a laser diode chip fixedly mounted on said carrier;
• a thermistor fixedly mounted on said carrier;
• a terminal extended through said base member for connecting said thermistor to an external circuit;
• a relay block provided between said thermistor and said terminal, said relay block comprising a plurality of blocks provided in contact with said carrier, said blocks being connected together by wire bonding;
• first connecting means for connecting said thermistor to said relay block;
• second connecting means for connecting said relay block to said terminal;
• a cap fixed to said base member for sealingly enclosing said Peltier device, said carrier, said laser diode chip, said thermistor, and said relay block;
• and
• means for detecting a resistance of said thermistor and controlling a driving current for said Peltier device contacting with said carrier to maintain said resistance at a constant value.