Patent ID: 9312701
Filing Date: 2016-04-12
CPC Classification: H02J,H04B

Claim Text:
1. A system for optical wireless power transmission to a power receiving apparatus comprising: an optical resonator having end reflectors and adapted to emit an optical beam; a gain medium positioned inside said optical resonator and having a first bandgap energy, said gain medium being thermally attached to a cooling system and configured to amplify light passing through it; a driver supplying power to said gain medium, and controlling the small signal gain of said gain medium; a beam steering apparatus configured to direct said optical beam in at least one of a plurality of directions; an optical-to-electrical power converter configured to convert said optical beam into electrical power having a voltage, said optical-to-electrical power converter having a second bandgap energy; an electrical voltage converter, adapted to convert the voltage of said electrical power generated by said optical-to-electrical power converter into a different voltage, said electrical power converter comprising an inductor, an energy storage device and a switch; at least one surface associated with said optical-to-electrical power converter and optically disposed between said gain medium and said optical-to-electrical power converter, a detector configured to provide a signal indicative of said optical beam impinging on said optical-to-electrical power converter; and a controller adapted to control at least one of the status of said beam steering apparatus and said driver, said controller receiving a control input signal from at least said detector, wherein: (i) diffusively, or (ii) such that said reflected light has a virtual focus positioned remotely from said optical resonator relative to said surface, or (iii) such that said reflected light has a real focus positioned at least 1 cm. in the direction of said optical resonator relative to said surface; where R is measured in Ohms, Egain is the first bandgap energy measured in Joules, and Plaser driver is the power supplied by the laser driver to the gain medium, measured in Watts, and