Light source control system
AssigneeOZ Optics Ltd.
InventorGordon David Youle
Life of this patent
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Abstract
A system and method for controlling an optical light source is provided. A current source drives the light source, while the voltage across and the current through the light source is measured. The voltage and current are converted to digital signals and sent to a neural network, which generates a modeled optical output power of the light source and a modeled value of the optical wavelength. A control circuit receives the modeled optical output power and wavelength and sends a control signal to the current source to minimize the difference between the desired power output and the modeled output power. In addition, a control signal is sent to a Peltier driver to control the temperature of a Peltier cooler in order to increase or decrease the wavelength emitted by a laser diode.
Claims8
An apparatus for controlling an optical light source, comprising:
- a light source;
- a current source for driving the light source;
- means for measuring voltage across the light source;
- means for measuring current through the light source;
- means for converting the voltage and current to digital signals;
- a neural network receiving the digital signals as inputs, the neural network generating a modeled optical output power of the light source;
- and
- a control circuit for receiving the modeled optical output power as an input, and for sending a first control signal to the current source to minimize a difference between a desired power output and the modeled output power.
A method for controlling an optical light source controlled by a current source, comprising the following steps:
- generating a set of data through a training period;
- training a neural network to develop a model with the set of data;
- measuring a voltage across the light source;
- measuring a current through the light source;
- converting the voltage and current to digital signals;
- sending the digital signals to a neural network that generates a modeled optical output power of the light source;
- comparing the modeled optical output power with a desired power output;
- and
- sending a control signal to the current source to minimize a difference between the desired power output and the modeled optical output power.
Dependencies are inferred from the claim text.