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US 12,638,387 B2Granted
Cat's-eye swept source laser for oct and spectroscopy
AssigneeKineoLabs, Inc.
InventorsWalid A. Atia, Dale C. Flanders
Life of this patent
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Abstract
A tunable or swept laser architecture that is appropriate for swept source optical coherence tomography and other applications including spectroscopy employing a cat's-eye configuration with a preferably transmissive tilt tuned interference thin film filter.
Claims16
A tunable laser, comprising:
- a gain chip for amplifying light in a laser cavity;
- a collimating lens for collimating light from the gain chip;
- an end reflector of the laser cavity;
- a focusing lens for focusing the collimated light on the end reflector;
- a thin film bandpass filter between the collimating lens and the focusing lens;
- and
- at least one angle control actuator for changing the angle of the thin film filter to the collimated light;
- wherein a cone half angle of the collimated light is less than 0.04×0.02 degrees.
5 more elements
A control method for a tunable laser, comprising:
- amplifying light in a laser cavity with a gain chip;
- generating collimated light from the gain chip with a cone half angle of the collimated light being less than 0.04×0.02 degrees;
- focusing the collimated light on an end reflector;
- controlling an angle of a thin film bandpass filter in the collimated light with a servo mechanism.
1 more element
Dependencies are inferred from the claim text.