Laser control method, laser apparatus, laser treatment method used for the same, laser treatment apparatus
AssigneePanasonic Corporation
InventorsKatsuichi Ukita, Hidehiko Karasaki, Daisuke Yokohagi
Life of this patent
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Abstract
A laser controlling method can generate laser of stable laser pulses, and eliminate useless time from a machining procedure. The method uses a gain medium and a Q-switch, and emits exciting light to the gain medium, thereby setting the Q-switch in a continuous oscillation mode, and prepares a given Q-switch pause time before a laser pulse is generated. When the continuous oscillation is kept going longer than a given time, the control method sets a Q-switch pause time for obtaining a first laser pulse to be different from a Q-switch pause time for obtaining a second laser pulse and onward.
Claims6
A method for controlling a laser, comprising:
- setting an OFF time value,
- initializing a counter to cause a laser to emit N laser pulses,
- continuously irradiating a gain medium with light,
- turning a Q-switch ON for a first ON time duration,
- determining a first OFF time duration and a second OFF time duration, the second OFF time duration being equal to said OFF time value, and the first OFF time duration being of a different duration than the second OFF time duration;
- turning the Q-switch OFF for said first OFF time duration to increase a gain of the laser when the first ON time duration is longer than said OFF time value, and turning the Q-switch OFF for said second OFF time duration to increase a gain of the laser when the first ON time duration is shorter than said OFF time value,
- turning the Q-switch ON to cause said laser to emit a first of said N laser pulses, and
- turning the Q-switch OFF and ON for N−1 successive cycles to emit N−1 laser pulses, wherein the Q-switch is turned OFF for the second OFF time duration to obtain each of the N−1 laser pulses.
Dependencies are inferred from the claim text.