Multi-wavelength generating method and apparatus based on flattening of optical spectrum

An optical-spectrum flattening apparatus comprising:

• first means for obtaining a discrete spectrum of a mode spacing corresponding to a repetition frequency Δf using an output light obtained by modulating an amplitude or phase of a continuous wave (CW) output from a single wavelength light source using the repetition frequency Δf;
• and
• second means for modulating said discrete spectrum of the mode spacing Δf with a frequency Ω, while Ω<2 fm, when a band of said discrete spectrum is 2 fm.

An optical-spectrum flattening method comprising:

• a first step of obtaining a discrete spectrum of a mode spacing corresponding to a repetition frequency Δf using an output light from a pulse light source or an optical pulse output circuit for outputting a pulsed light of the repetition frequency Δf;
• and
• a second step of modulating said discrete spectrum of the mode spacing Δf by frequency Ω, while Ω<2 fm, when a band of said discrete spectrum is 2 mn.

An optical-spectrum flattening apparatus comprising:

• first means for obtaining a discrete spectrum of a mode spacing corresponding to a repetition frequency Δf using an output light output from a pulse light source or an optical pulse output circuit for outputting a pulsed light of the repetition frequency Δf;
• and
• second means for modulating said discrete spectrum of the mode spacing Δf with a frequency Ω, while Ω<2 fm, when a band of said discrete spectrum is 2 fm.