Discharge excitation type pulse laser apparatus
First Claim
1. A discharge excitation type pulse laser apparatus, comprising:
- a pair of first and second main discharge electrodes disposed in opposition to each other for generating a main discharge therebetween;
an auxiliary discharge electrode disposed in the vicinity of said second main discharge electrode for generating a corona discharge between said second main discharge electrode and said auxiliary discharge electrode;
a first pulse generating circuit connected to said first and second main discharge electrodes for applying a pulse-like voltage for generating the main discharge between said first and second main discharge electrodes;
a second pulse generating circuit connected to said second main discharge electrode and said auxiliary discharge electrode for applying a pulse-like voltage for generating the corona discharge between said second main discharge electrode and said auxiliary discharge electrode;
switching means for controlling application and interruption of the voltage applied to said first and second main discharge electrodes from said first pulse generating circuit and the voltage applied to said second main discharge electrode and said auxiliary discharge electrode from said second pulse generating circuit;
a first saturable reactor connected between said switching means and said first pulse generating circuit; and
a second saturable reactor connected between said switching means and said second pulse generating circuit.
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Accused Products
Abstract
A discharge excitation type pulse laser apparatus includes main discharge electrodes and and an auxiliary discharge electrode. In order to make a voltage pulse applied to the auxiliary discharge electrode rise up steeply without incurring any appreciable time lag, a reactor connected in series to a first charging capacitor is constituted by a first saturable reactor 19 with a second saturable reactor being additionally inserted in series to a second charging capacitor. After stray inductance and resistance components of a switch become minimum, inductance of the saturable reactor is first decreased, which is then followed by decreasing of inductance of the first saturable reactor. Degree of steepness of the voltage rise-up for corona and main discharges can set at high values, respectively, whereby preionization is accelerated to allow the main discharge to occur uniformly. The energy injected into the main discharge is increased. Laser output power and oscillation efficiency are enhanced.
19 Citations
12 Claims
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1. A discharge excitation type pulse laser apparatus, comprising:
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a pair of first and second main discharge electrodes disposed in opposition to each other for generating a main discharge therebetween; an auxiliary discharge electrode disposed in the vicinity of said second main discharge electrode for generating a corona discharge between said second main discharge electrode and said auxiliary discharge electrode; a first pulse generating circuit connected to said first and second main discharge electrodes for applying a pulse-like voltage for generating the main discharge between said first and second main discharge electrodes; a second pulse generating circuit connected to said second main discharge electrode and said auxiliary discharge electrode for applying a pulse-like voltage for generating the corona discharge between said second main discharge electrode and said auxiliary discharge electrode; switching means for controlling application and interruption of the voltage applied to said first and second main discharge electrodes from said first pulse generating circuit and the voltage applied to said second main discharge electrode and said auxiliary discharge electrode from said second pulse generating circuit; a first saturable reactor connected between said switching means and said first pulse generating circuit; and a second saturable reactor connected between said switching means and said second pulse generating circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A discharge excitation type pulse laser apparatus, comprising:
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a pair of first and second main discharge electrodes disposed in opposition to each other for generating a main discharge therebetween; an auxiliary discharge electrode disposed in the vicinity of said second main discharge electrode for generating a corona discharge between said second main discharge electrode and said auxiliary discharge electrode; a first pulse generating circuit connected to said first and second main discharge electrodes for applying a pulse-like voltage for generating the main discharge between said first and second main discharge electrodes; a second pulse generating circuit connected to said second main discharge electrode and said auxiliary discharge electrode for applying a pulse-like voltage for generating the corona discharge between said second main discharge electrode and said auxiliary discharge electrode; switching means for controlling application and interruption of the voltage applied to said first and second main discharge electrodes from said first pulse generating circuit and the voltage applied to said second main discharge electrode and said auxiliary discharge electrode from said second pulse generating circuit; and a saturable transformer inserted between said switching means and said first and second pulse generating circuits and having a primary winding connected between said switching means and said first pulse generating circuit and a secondary winding connected to said second pulse generating circuit. - View Dependent Claims (9, 10)
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11. A discharge excitation type pulse laser apparatus, comprising:
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a pair of first and second main discharge electrodes disposed in opposition to each other for generating a main discharge therebetween; an auxiliary discharge electrode disposed in the vicinity of said second main discharge electrode for generating a corona discharge between said second main discharge electrode and said auxiliary discharge electrode; a first pulse generating circuit connected to said first and second main discharge electrodes for applying a pulse-like voltage for the main discharge between said first and second main discharge electrodes; a second pulse generating circuit connected to said second main discharge electrode and said auxiliary discharge electrode for applying a pulse-like voltage for generating the corona discharge between said second main discharge electrode and said auxiliary discharge electrode; switching pulse generating means for controlling application and interruption of a voltage applied to said first and second main discharge electrodes from said first pulse generating circuit and a voltage applied to said second main discharge electrode and said auxiliary discharge electrode from said second pulse generating circuit; a saturable transformer connected between said pulse generating means and said first and second pulse generating circuits; and a first charging capacitor connected across both ends of said switching pulse generating means. - View Dependent Claims (12)
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Specification