Laser apparatus
AssigneeKimmon Koha Co., Ltd.
InventorsYasushi Fujimoto, Paul Binun, Shinji Motokoshi, Masamori Nakahara, Takeshi Hamada
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Abstract
A laser apparatus includes: a laser oscillator that includes a mirror and emits a laser beam; and an external resonator that includes a nonlinear optical crystal that functions as a phase conjugate mirror. The phase conjugate mirror reflects the laser beam and produces a phase conjugate wave that reaches the mirror of the laser oscillator, and the mirror of the laser oscillator and the phase conjugate mirror cause laser oscillation such that a wavelength and a phase of the laser beam oscillated by the laser oscillation are automatically fixed.
Claims11
A laser apparatus comprising:
- a laser oscillator that comprises a mirror and emits a laser beam;
- and
- an external resonator that comprises a nonlinear optical crystal that functions as a phase conjugate mirror, wherein
- the phase conjugate mirror reflects the laser beam and produces a phase conjugate wave that reaches the mirror of the laser oscillator, and
- the mirror of the laser oscillator and the phase conjugate mirror cause laser oscillation such that a wavelength and a phase of the laser beam oscillated by the laser oscillation are automatically fixed.
A laser apparatus comprising:
- a laser oscillator that comprises a mirror and emits a laser beam;
- and
- an external resonator that increases a light intensity of the laser beam and comprises a nonlinear optical crystal, wherein
- the nonlinear optical crystal functions as a phase conjugate mirror on which the laser beam is reflected to travel along a reverse optical path to reach the mirror of the laser oscillator,
- the mirror of the laser oscillator and the phase conjugate mirror cause laser oscillation such that a wavelength and a phase of the laser beam oscillated by the laser oscillation are automatically fixed, and
- the nonlinear optical crystal produces a higher harmonic wave of the laser beam oscillated by the laser oscillation and outputs the higher harmonic wave from the external resonator.
A laser oscillating method using a laser oscillator that comprises a mirror, and an external resonator that comprises a nonlinear optical crystal, the method comprising:
- emitting from the laser oscillator a laser beam that reaches the external resonator that increases a light intensity of the laser beam, wherein
- the nonlinear optical crystal functions as a phase conjugate mirror on which the laser beam is reflected to travel along a reverse optical path to reach the mirror of the laser oscillator, and
- once the mirror of the laser oscillator and the phase conjugate mirror cause laser oscillation, outputting from the external resonator a higher harmonic wave of the laser beam oscillated by the laser oscillation, wherein
- the higher harmonic wave is generated by the nonlinear optical crystal.
Dependencies are inferred from the claim text.