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US 12,464,855 B1Granted
Photodiode heater
OwnerLong Cheninventor
Life of this patent
Estimating the term…
Abstract
An apparatus and system, including a chip including a photodetector, wherein the photodetector includes a semiconductor photodiode and a heater proximate to the photodiode; wherein the heater is enabled to increase a temperature of the photodiode and a temperature sensing device to determine the temperature of the photodiode.
Claims22
An apparatus comprising:
- a temperature sensing device;
- a chip including a photodetector;
- wherein the photodetector includes a germanium-based photodiode, an electrode connected to the top of the germanium-based photodiode, and an integrated heater embedded in the chip;
- wherein the integrated heater is proximate to and above at least a portion of the electrode connected to the germanium-based photodiode;
- wherein the integrated heater is surrounded on all sides by an insulator material;
- wherein the integrated heater is enabled to increase a temperature of the germanium-based photodiode during operation of the germanium-based photodiode to detect an optical signal;
- wherein the temperature sensing device is enabled to determine the temperature of the germanium-based photodiode;
- and
- control logic to keep the temperature of the germanium-based photodiode at a temperature range to maintain high responsivity in detecting light throughout a range between 1525 nm and 1610 nm by controlling the heater using a temperature from the temperature sensing device.
6 more elements
A system comprising:
- a chip including a photodetector;
- wherein the photodetector includes a germanium-based photodiode, an electrode connected to the top of the germanium-based photodiode, and an integrated heater embedded in the chip;
- wherein the integrated heater is proximate to and above at least a portion of the electrode connected to the germanium-based photodiode;
- wherein the integrated heater is surrounded on all sides by an insulator material;
- wherein the integrated heater is enabled to increase a temperature of the germanium-based photodiode during operation of the germanium-based photodiode to detect an optical signal;
- and
- a temperature sensing device to determine the temperature of the germanium-based photodiode;
- and
- control logic;
- wherein the control logic enables:
- detecting the temperature of the germanium-based photodiode using the temperature sensing device;
- comparing the temperature to a threshold;
- and
- adjusting power to a heater power to control a temperature of the germanium-based photodiode to keep the temperature of the germanium-based photodiode at a temperature range to maintain high responsivity in detecting light throughout a range between 1525 nm and 1610 nm.
11 more elements
Dependencies are inferred from the claim text.