The present disclosure provides a method and system for distinguishing between a stone and a tissue based on fluorescence from the stone or the tissue. Multiple reference beams are projected on a target to determine the distance to the target. The intensity of a fluorescence excitation beam is measured in conjunction with the determined distance to calculate the luminescence of the target and therefore it is a valid target for therapeutic lasing. In case a valid target for therapeutic lasing is detected and a switch is actuated, the therapeutic lasing will be enabled. In case a valid target for therapeutic lasing is not detected and the switch is actuated, the therapeutic lasing will be immediately disabled. The fluorescence excitation beam is pulsed at a high intensity and low duty cycle to avoid blinding an endoscopic imager used in the procedure.

Systems, devices, and methods for automatic control of laser treatment of target structure in a body of a subject based on acoustic feedback in response to delivery of laser energy to the target are disclosed. An exemplary laser energy delivery system comprises a laser system to direct laser energy at a body target, and a controller circuit to receive an acoustic signal in response to delivery of laser energy to the target, and to measure acoustic properties from the acoustic signal. The control circuit may generate control signals for controlling the laser system to adjust laser energy output, or for controlling an actuator to adjust a position of a laser fiber distal end relative to the target to achieve a desired therapeutic effect.

Present application relates to field of lasers, provides an integrated laser and a wavelength control method, integrated laser includes a light source, a resonant cavity and an annular mirror; light source is connected with a head end of first optical waveguide through a first coupler; a tail end of first optical waveguide is connected with a second coupler; second coupler is connected with a first end of resonant cavity; second coupler is also provided with a light output end which is used for outputting light waves input by resonant cavity to an object; second end of resonant cavity is connected with a third coupler; third coupler is connected with annular mirror through a second optical waveguide; at least one of resonant cavity, first optical waveguide and second optical waveguide is made of phase-change device. Integrated laser is used for outputting laser of which wavelength can be continuously tuned.

Systems, devices, and methods for automatic control of laser treatment of target structure in a body of a subject based on acoustic feedback in response to delivery of laser energy to the target are disclosed. An exemplary laser energy delivery system comprises a laser system to direct laser energy at a body target, and a controller circuit to receive an acoustic signal in response to delivery of laser energy to the target, and to measure acoustic properties from the acoustic signal. The control circuit may generate control signals for controlling the laser system to adjust laser energy output, or for controlling an actuator to adjust a position of a laser fiber distal end relative to the target to achieve a desired therapeutic effect.

An optical resonator for a medical laser system is provided. The optical resonator comprises a lasing medium, an optical pump, and a high-reflective (HR) and an optical coupling (OC) reflector. The HR and OC reflectors are disposed symmetrically relative to the lasing medium and the HR mirror, the OC mirror, or both the HR mirror and the OC mirror are flat mirrors. The optical resonator also includes a doped insert in which the lasing medium is disposed.

A fractional handpiece and systems thereof for skin treatment include a passively Q-switched laser assembly operatively connected to a pump laser source to receive a pump laser beam having a first wavelength and a beam splitting assembly operable to split a solid beam emitted by the passively Q-switched laser assembly and form an array of micro-beams across a segment of skin. The passively Q-switched laser assembly generates a high power sub-nanosecond pulsed laser beam having a second wavelength.

An ophthalmological device for processing a curved treatment face in eye tissue comprises a scanner system with a plurality of scan axes configured to move the focal spot to target locations in the eye tissue. A circuit is configured control the scanner system to move the focal spot to target locations along a processing path, defined by treatment control data, to process the curved treatment face in the eye tissue. The circuit is further configured to perform a feasibility check, using the treatment control data and scan capabilities of the scanner system, defined by scan performance characteristics of each particular scan axis. In case the feasibility check indicates that moving the focal spot along the processing path exceeds the scan capabilities of the scanner system, the circuit adjusts the treatment control data.