| 摘要 |
Desired nonlinear optical effects are induced by light having high peak power through the use of light pulses from a semiconductor laser, but without the use of light pulses from a titanium-sapphire laser or other large-scale solid-state laser having high mean power. A semiconductor laser pulse beam (with a repetition rate of 1 MHz, for example) that has a wavelength of 1550 nm [and is emitted] by a semiconductor laser (laser diode (LD)) 15 is efficiently amplified in a two-stage (pre and main) EDFA 20, 40. An optical filter 30 removes the optical noise component caused by spontaneous emissions. Second-harmonic light pulses, which are generated by the nonlinearity of an optical device (periodic polarization-inverting Mg-doped LiNbO 3 (PPMgLN)) 50, are extracted from the amplified pulsed light by an optical filter 60, and supercontinuum light in the 800 nm wavelength range is generated from a photonic crystal fiber (PCF) 70.
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