| 摘要 |
PURPOSE:To provide a laser apparatus capable of highly effectually generating a second harmonic wave with reduced variations without increasing the number of optical elements in an optical resonator. CONSTITUTION:A title laser apparatus is constructed with a thermistor 5, a Peltier element 6, and a second harmonic generation(SHG) unit which serve together to control the temperature of a nonlinear optical crystal 4 such that the phase shift of a fundamental wave when it passes through the nonlinear optical crystal 4 is an integral multiple of 2pi in order to generate a type 2 second harmonic wave. |
