| 摘要 |
PROBLEM TO BE SOLVED: To provide a wavelength multiplex optical transmission system whose configuration can be easily simplified. SOLUTION: A periodic filter 1 periodically separates a wavelength multiplexed light comprising multiplexed wavelength lights λ1, λ2, etc., into wavelength groups comprising wavelength lights of (λ1, λp+1, λ2p+1, etc.), (λ2, λp+2, λ2+2, etc.), etc. Then an optical exchange section 3 selects an wavelength group, Differentiating the period (p) of the periodic optical filter 1 from the period (q) of a periodic optical filter 2 can output the wavelength lights included in each wavelength group from different separate ports of the periodic optical filter 2 so as to completely separately the wavelength light. |
