Single sideband optical modulator for lightwave systems

Details Single sideband optical modulator for lightwave systems Single sideband optical modulator for lightwave systems

G - Physics

02

F

G02F 1/035 (2006.01) G02F 1/03 (2006.01) H04B 10/04 (2006.01) H04B 10/18 (2006.01)

Patent

CA 2058638

90-3-822 SINGLE SIDEBAND OPTICAL MODULATOR FOR LIGHTWAVE SYSTEMS Abstract Optical communication methods and apparatus are disclosed for transmitting two or more optical signals with different optical carrier frequencies on a single optical fiber with high spectral efficiency. Each optical carrier is typically modulated with multiple modulated subcarriers. In one embodiment, an optical phase modulator provides cancellation of second order intermodulation products in each optical signal, thereby permitting the optical carrier frequencies to be spaced by 2fmax, where fmax is the maximum modulation frequency. In another embodiment, a single sideband optical phase modulator provides cancellation of second order intermodulation products and one signal sideband, thereby permitting the optical carrier frequencies to be spaced by fmax.

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