Spectral Entrainment in Second Harmonic Coherent Light Generated by Semiconductor Laser Diodes
The phenomena of mutual entrainment have been recognized as a pulling effect of a group of oscillators in various fields. This paper demonstrates the possibility of the mutual entrainment in optical second harmonic generation (SHG) in a semiconductor laser diode , which gives a dipping and pullimg structure in the harmonic spectra, while there are no shuck structures in the fundamental spectra. The coexisting fundamental polarization and second harmonic polarization may pick up noises independently, giving rise to the quadratic randomness needed in the Wiener’s theory of nonlinear random processes.
KeywordsCoherent State Second Harmonic Generation Harmonic Generation Phase Fluctuation Harmonic Spectrum
- IL Matsueda, “Physical Basis of Optoelectronic Integration”,Chap.2 of ‘Optoclectronic Integration’,ed. O. Wada (Kluwer Academic Publishers, Boston ).17–60, 199–1.Google Scholar
- N. Wiener, “Nonlinear Problems in Random Theory”,(MIT press, Cambridge, Massachusetts, 1958) Chap.4 and 8.Google Scholar