| 摘要 |
PROBLEM TO BE SOLVED: To make the frequency of an optical signal high without any electrical burdening. SOLUTION: An optical pulse with a comparatively wide wavelength width is emitted from a light source and is entered into an incident side optical waveguide of a wavelength filtering device having no wavelength selectivity (S10), and modulated light with a periodical wavelength interval is generated by a microring resonator (S12). The optical pulse is input into a wavelength dispersing device and is subjected to a processing, the speed of which varies according to the wavelength so as to be separated into independent time pulses for every wavelength (S16). From the wavelength dispersing device an optical pulse string (a time intensity modulating signal) the intensity of which is modulated in a time-axis direction of a frequency higher than that of incident light, is output. Because the wavelength filtering device and the wavelength dispersing device are passive components, the optical pulse string with a higher frequency is obtained without any electrical burdening. COPYRIGHT: (C)2009,JPO&INPIT |
