摘要:
A cataract surgical system includes a laser source to generate a first set of laser pulses; a guiding optic to guide the first set of laser pulses to a cataract target region in an eye; a laser controller to generate an electronic representation of a target scan pattern, and to control the guiding optic to scan the first set of laser pulses according to a portion of the target scan pattern to create a first photo-disrupted region in the cataract target region; and a Swept-Source Optical Coherence Tomographic (SS-OCT) imaging system to generate an image of a portion of the first photo-disrupted region. The laser controller can generate an electronic representation of a modified scan pattern in relation to the image generated by the SS-OCT imaging system, and control the guiding optic to scan a second set of laser pulses according the modified scan pattern.
摘要:
A laser surgical system for fragmenting lens tissue of an eye, the system comprises a pulsed laser (302) adapted to generate a pulsed laser beam; an optics module (310) adapted to direct the laser beam towards a target region in the lens tissue; wherein the system control module (320) is adapted to control the optics module to form a regular array of cells in the target region by creating layers of photodisrupted bubbles to generate cell boundaries, wherein the layers of photodisrupted bubbles are curved.
摘要:
A laser oscillator to generate a pulsed light beam includes an output coupler mirror, configured to reflect a reflected portion of the pulsed light beam back into the laser oscillator, and to couple an outputted portion of the pulsed light beam out from the laser oscillator; an end-mirror, configured to return the pulsed light beam into the laser oscillator; a gain material, positioned between the output coupler mirror and the end-mirror along an optical path, configured to amplify the pulsed light beam; a self-starting saturable absorber, configured to self-start a pulsed mode-locking operation of the laser oscillator; and a pulse-shaping saturable absorber, configured to shape pulses of the pulsed light beam into laser pulses with a pulse length of less than 1,000 femtoseconds.
摘要:
A laser adjustment system can include an adjustable seed-beam restrictor (230), configured to be attachable to a stretcher-compressor (200) in a transverse-adjustable manner, and to restrict an incidence of a seed beam (101), generated by an oscillator (100), on the stretcher-compressor (200), wherein the stretcher-compressor (200) is configured to be integrated into a chirped pulse amplification laser engine (1), and to stretch a duration of seed pulses (lOlp) of the seed beam (101).
摘要:
Designs and techniques for constructing and operating femtosecond pulse lasers are provided. One example of a laser engine includes an oscillator that generates and outputs a beam of femtosecond seed pulses, a stretcher-compressor that stretches a duration of the seed pulses, and an amplifier that receives the stretched seed pulses, amplifies an amplitude of selected stretched seed pulses to create amplified stretched pulses, and outputs a laser beam of amplified stretched pulses back to the stretcher-compressor that compresses their duration and outputs a laser beam of femtosecond pulses. The amplifier includes a dispersion controller that compensates a dispersion of the amplified stretched pulses, making the repetition rate of the laser adjustable between procedures or according to the speed of scanning. The laser engine can be compact with a total optical path of less than 500 meters, and have a low number of optical elements, e.g. less than 50.