Packaged laser thermal control system
AssigneeBoreal Laser Inc.
InventorJohn Tulip
Life of this patent
Estimating the term…
Abstract
A thermal stabilization system for a packaged diode laser. An outer thermoelectric cooler (TEC) stabilizes the temperature of the laser package and an inner TEC stabilizes the temperature of the laser diode element of the packaged laser. The inner and outer TECs may be controlled by electronics which is also stabilized in temperature, for example using resistive heating. The packaged laser may be mounted on a heat spreader mounted on the outer TEC and may be surrounded by an insulated covering on all sides other than the surface mounted on the heat spreader. There may also be a thermally conductive cap over the packaged laser, with the insulation arranged outside the cap if both are present.
Claims22
A thermal control system for a packaged laser diode, the packaged laser diode having a laser package and a diode within the laser package, the thermal control system comprising:
- an outer Peltier element located exterior to and thermally mounted in relation to the laser package;
- a controller connected to the outer Peltier element and connected to receive a signal indicative of a temperature of the laser package to control the outer Peltier element according to the signal indicative of a temperature of the laser package;
- and
- a further controller connected to an inner Peltier element located within the laser package, the further controller connected to receive a signal indicative of a temperature of the diode to control the inner Peltier element according to the signal indicative of a temperature of the diode.
A thermal control system for a packaged laser diode, the packaged laser diode having a laser package and a diode within the laser package, the thermal control system comprising:
- an outer Peltier element located exterior to and thermally mounted in relation to the laser package;
- a controller connected to the outer Peltier element and connected to receive a signal indicative of a temperature of the laser package to control the outer Peltier element according to the signal indicative of a temperature of the laser package;
- a heat conductive element mounted between the outer Peltier element and the laser package;
- and
- a heat conductive cap arranged around the laser package and connected thermally to the heat conductive element.
A thermal control system for a packaged laser diode, the packaged laser diode having a laser package and a diode within the laser package, the thermal control system comprising:
- an outer Peltier element located exterior to the laser package, and arranged to influence a temperature of the laser package;
- a controller connected to the outer Peltier element and connected to receive a signal indicative of the temperature of the laser package to control the outer Peltier element according to the signal indicative of the temperature of the laser package;
- and
- a further controller connected to an inner Peltier element located within the laser package, the further controller connected to receive a signal indicative of a temperature of the diode to control the inner Peltier element according to the signal indicative of a temperature of the diode.
A thermal control system for a packaged laser diode, the packaged laser diode having a laser package and a diode within the laser package, the thermal control system comprising:
- an outer Peltier element located exterior to and thermally mounted in relation to the laser package;
- a controller connected to the outer Peltier element and connected to receive a signal indicative of a temperature of the laser package to control the outer Peltier element according to the signal indicative of a temperature of the laser package;
- a further controller connected to an inner Peltier element located within the laser package, the further controller connected to receive a signal indicative of a temperature of the diode to control the inner Peltier element according to the signal indicative of a temperature of the diode;
- and
- a temperature controlled circuit board and a laser driver mounted on the temperature controlled circuit board, the laser driver connected to drive the diode, and the laser driver including the controller and further controller.
Dependencies are inferred from the claim text.