A novel Optical Add/Drop Multiplexer(OADM) based on the tunable F-P cavity filter is presented.Its crosstalk characteristics are analyzed and calculated in detail and measures for improvement proposed.In the experiment
the spectral line width and insertion loss of the downloaded wavelength are only 0.18 nm and 4.2 dB respectively;the channel isolation is greater than 26.5 dB and the Free Spectral Range(FSR) wider than 33 nm.The OADM is characteristic of simple structure
high isolation
precision tuning
small insertion loss
low cost and low power consumption and can be widely used in the existing DWDM systems.