| 摘要 |
A laser light generating apparatus in which the laser light from a laser light source is intensified by an optical resonator arranged outside the laser light source and outputted after wavelength conversion by a non-linear optical crystal element arranged within the optical resonator. The laser light generating apparatus includes a laser light source for radiating the laser light, an optical resonator for resonating the laser light radiated from the laser light source, a non-linear optical crystal element having an anti-reflection film formed on its laser light incident surface and an aperture for interrupting the light reflected by the non-linear optical crystal element within the optical resonator. The non-linear optical crystal element is arranged in the optical resonator so that a line drawn normal to the laser light incident surface will be obliquely inclined relative to the optical axis of the laser optical resonated within the optical resonator. With the present laser light generating apparatus, the reflected light from the non-linear optical crystal element responsible for reverse traveling wave is interrupted by the aperture for suppressing generation of the reverse traveling wave in the light resonator, so that return optical to the laser light source is suppressed to eliminate the necessity for providing an optical isolator.
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