Picosecond optical radiation systems and methods of use
AssigneeCynosure, Inc.
InventorsMirko Georgiev Mirkov, Rafael Armando Sierra
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Abstract
Methods, systems and apparatus are disclosed for delivery of pulsed treatment radiation by employing a pump radiation source generating picosecond pulses at a first wavelength, and a frequency-shifting resonator having a lasing medium and resonant cavity configured to receive the picosecond pulses from the pump source at the first wavelength and to emit radiation at a second wavelength in response thereto, wherein the resonant cavity of the frequency-shifting resonator has a round trip time shorter than the duration of the picosecond pulses generated by the pump radiation source. Methods, systems and apparatus are also disclosed for providing beam uniformity and a sub-harmonic resonator.
Claims34
An apparatus for delivery of pulsed treatment radiation comprising:
- a pump radiation source generating pumping pulses at a first wavelength,
- a wavelength-shifting oscillator defining a resonant cavity comprising a first laser gain material, and
- an optical amplifier comprising a second laser gain material that is different from the first laser gain material, wherein the oscillator output wavelength varies in response to controlled temperature changes, wherein the oscillator temperature is controlled to emit a maximum energy amplified output pulse from the optical amplifier at a second wavelength.
A method of delivering pulsed treatment radiation comprising:
- generating pumping pulses, using a pump radiation source, wherein one or more pumping pulses are at a first wavelength and a first pulse duration;
- transmitting the pumping pulses to a wavelength-shifting oscillator and then from the oscillator to an optical amplifier, the oscillator comprising a first laser gain material;
- varying the temperature of the first laser gain material such that the oscillator output wavelength varies;
- controlling the temperature of the first laser gain material to emit a maximum energy output from the optical amplifier;
- and
- emitting pulsed treatment radiation at a second wavelength from the optical amplifier, the optical amplifier comprising a second laser gain material that is different from the first laser gain material.
A system for generating picosecond pulses, the system consisting essentially of:
- a pump radiation source generating pumping pulses at a first wavelength,
- a wavelength-shifting oscillator defining a resonant cavity comprising a first laser gain material, and
- an optical amplifier comprising a second laser gain material that is different from the first laser gain material, wherein the oscillator output wavelength varies in response to controlled temperature changes, wherein the oscillator temperature is controlled to emit a maximum energy amplified output pulse from the optical amplifier at a second wavelength.
Dependencies are inferred from the claim text.