Picosecond Optical Radiation Systems and Methods of Use
AssigneeCynosure, Inc.
InventorsRafael Armando Sierra, Mirko Georgiev Mirkov
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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.
Claims41
An apparatus for delivery of pulsed treatment radiation comprising:
- a pump radiation source generating picosecond pulses at a first wavelength, and
- a wavelength-shifting resonator having a lasing medium and resonant cavity configured to receive the picosecond pulses from the pump radiation source at the first wavelength and to emit radiation at a second wavelength in response thereto,
- wherein the resonant cavity of the wavelength-shifting resonator has a round trip time shorter than the duration of the picosecond pulses generated by the pump radiation source.
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A method for shifting the wavelength of a picosecond optical radiation pulse, the method comprising:
- generating a pulse of optical radiation at a first wavelength and having a duration less than 1000 picoseconds,
- pumping a wavelength-shifting resonator with the pulse of optical radiation at the first wavelength, the wavelength-shifting resonator comprising a laser crystal with a high absorption coefficient at the first wavelength,
- wherein the round trip time of the wavelength-shifting resonator is shorter than the pumping laser pulse duration;
- and
- extracting a pulse of radiation at a second wavelength emitted by the wavelength-shifting resonator, wherein the pulse at the second wavelength also has a duration of less than 1000 picoseconds.
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A method for treating tattoos or skin pigmentation disorders using a picosecond optical radiation source, the method comprising:
- employing a pump radiation source to generate a pulse of optical radiation at a first wavelength, wherein the pulse has a duration of less than 1000 picoseconds,
- pumping a wavelength-shifting resonator with the pulse of optical radiation at the first wavelength, the wavelength-shifting resonator comprising a laser crystal with high absorption coefficient at the first wavelength,
- wherein the round trip time of the wavelength-shifting resonator is shorter than the pumping laser pulse duration;
- extracting a pulse of radiation at a second wavelength emitted by the wavelength-shifting resonator, wherein the pulse at the second wavelength also has a duration of less than 1000 picoseconds;
- and
- delivering the pulse of radiation at the second wavelength to a frequency-doubling waveguide so as to generate a pulse of radiation at a third wavelength, wherein the pulse at the third wavelength also has a duration of less than 1000 picoseconds
- directing the pulse at the third wavelength to a tattoo pigment or a skin pigmentation target to disrupt the target and promote clearance thereof.
A method for removing a tattoo or treating a skin pigmentation disorders, the method comprising:
- applying pulses having a duration less than 1000 picoseconds to an area of a patient's skin comprising a tattoo pigment or skin pigmentation so as to generate photomechanical disruption of the tattoo pigment or skin pigmentation, wherein the pulses have a wavelength in a range of about 400 nm to about 550 nm.
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Dependencies are inferred from the claim text.