| 摘要 |
An optical tunable filter/wavelength converter comprises an input for multiple wavelength traffic carrying signals g <SB>1</SB>- g <SB>m</SB>, an output for convened wavelength carrying signals ( g <SB>1</SB>'- g <SB>m</SB>'), means (20) for routing each of the traffic carrying signals through a demultiplexer to an individual semiconductor optical amplifier (SOA) (22) or to an interferometer arrangement. A laser source (26) provides a further input wavelength to the SOAs, or to the interferometer arrangements, to enable cross-gain or cross-phase modulation from the input signal which thereby provides the converted signal. Means is provided for selectively routing the converted signal to the output. |
