Laser system with short pulse characteristics and its methods of use

  • US 7,771,417 B2
  • Filed: 02/24/2005
  • Issued: 08/10/2010
  • Est. Priority Date: 02/24/2005
  • Status: Active Grant
First Claim
Patent Images

1. A laser system, comprising:

  • a diode pump source; and

    a frequency doubled solid state visible laser pumped by the diode pump source, the frequency double solid state visible laser producing an output of a train of pulses;

    a photodetector generating a signal; and

    a controller including a software control loop that, in response to the signal from the photodetector, alters drive current to the diode pump source within about a millisecond, and a hardware control loop that, in response to the signal from the photodetector, controls timing of the train of pulses to within a microsecond so that the controller provides instructions for the output of the train of pulses with on times of 25 microseconds to 10 milliseconds per pulse such that the train of pulses is sufficient for photoactivation of a therapeutic healing response in tissue at a target site, and off times of 75 to 100,000 microseconds such that the train of pulses is insufficient to induce traditional photocoagulation of the tissue at the target site, the photodetector coupling the controller to the pulsed output so that a power of the pulsed output is within less than 10% of a desired power.

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