Laser ablation with electromagnetic energy feedback

At least one machine readable medium comprising a plurality of instructions that in response to being executed by circuitry of a controller for a surgical laser-system, cause the circuitry to:

• send a control signal to a laser source of the surgical laser system, the control signal to cause the laser source to generate a laser energy at one or more first wavelengths, wherein the surgical laser system is configured to be optically coupled to a proximal end of a laser fiber such that the laser energy can be discharged from a distal end of the laser fiber toward an object as part of a lithotripsy procedure;
• receive, from a photodetector of the surgical laser system, an indication of an intensity of a feedback, wherein the photodetector is configured to be optically coupled to the proximal end of the laser fiber and wherein the feedback is at a plurality of second wavelengths different from the one or more first wavelengths;
• determine a first intensity of the feedback in a first portion of the plurality of second wavelengths;
• determine a second intensity of the feedback in a second portion of the plurality of second wavelengths different from the first portion;
• and
• determine whether the object is a targeted object or a non-targeted object based on the first intensity relative to a first threshold intensity and the second intensity relative to a second threshold intensity different from the first threshold intensity,
• wherein the feedback is responsive to the laser energy being incident on the object,
• wherein the feedback is received at the distal end of the laser fiber and transmitted to the proximal end of the laser fiber.

A surgical laser system, comprising:

• a laser source configured to generate laser energy having one or more first wavelengths;
• a laser fiber coupler to couple the laser energy to a proximal end of a laser fiber, wherein the laser energy can be discharged from a distal end of the laser fiber toward an object during a lithotripsy procedure;
• a photodetector optically coupled to the proximal end of the laser fiber;
• a filter disposed in an optical path between the proximal end of the laser fiber and the photodetector, wherein the filter is configured to transmit laser energy having one or more second wavelengths different from the one or more first wavelengths;
• and
• a controller comprising a processor and a memory, wherein the memory comprises instructions, which when executed by the processor cause the processor to:
• send a control signal to the laser source to cause the laser source to generate the laser energy;
• receive, from the photodetector, an indication of an intensity of a feedback signal, wherein the feedback is at the one or more plurality of second wavelengths different from the one or more first wavelengths;
• determine a first intensity of the feedback in a first portion of the plurality of second wavelengths;
• determine a second intensity of the feedback in a second portion of the plurality of second wavelengths different from the first portion;
• and
• determine whether the object is a targeted object or a non-targeted object based on the first intensity relative to a first threshold intensity and the second intensity relative to a second threshold intensity different from the first threshold intensity;
• determine whether the object is a targeted object or a non-targeted object based on the indication of the intensity relative to a threshold intensity,
• wherein the feedback is responsive to the laser energy being incident on the object.