Laser heater assembly
AssigneeScientific-Atlanta, Inc.
InventorsBryant Best, William Mahoney
Life of this patent
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Abstract
A heated laser assembly for maintaining a set point temperature of a laser. A common transistor external to the laser is positioned in thermal proximity to the laser. A thermal transfer member is positioned in thermal contact between the laser and the transistor. The transistor heats the thermal transfer member, and thus heats the laser, when the ambient temperature drops below a set point temperature. Therefore, the overall temperature range the laser must operate over is reduce through the use of a common transistor.
Claims20
A heater assembly for heating when ambient temperature drops below a set point temperature, said heater assembly comprising:
- a laser;
- a heater external to said laser;
- a thermal transfer member positioned at least partially in thermal contact with said laser and said heater, wherein said heater heats said thermal transfer member and said laser to maintain said set point temperature for said laser when ambient temperature is below said set point temperature;
- and
- a temperature sensor in thermal contact with said thermal transfer member for sensing the temperature of said thermal transfer member wherein said temperature sensor is mounted on a printed circuit board of a fiber optic transmitter.
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A heated laser assembly for heating a laser to maintain a set point temperature, said heated laser assembly comprising:
- a transistor external to said laser;
- a thermal transfer member in thermal contact with said laser and said transistor, wherein said transistor heats said thermal transfer member to maintain said set point temperature for said laser when ambient temperature is below said set point temperature;
- and a temperature sensor in thermal contact with said thermal transfer member for sensing the temperature of said thermal transfer member wherein said temperature sensor is mounted on a printed circuit board of a fiber optic transmitter.
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Dependencies are inferred from the claim text.