In order to recover tributary clock signals from Optical Time Division Multiplexing（OTDM） signals and demultiplex them

and realize the interface between high speed optical signals and relatively lower speed electronic signals

we for the first time demonstrate an experimental scheme on the basis of a commercially available Mach-Zehnder Modulator（MZM） and Polarization Modulator（PolM）-cascaded Optoelectronic Oscillator（OEO） for tributary clock recovering and demultiplexing.Using this improved OEO

we recover 40 GHz electrical clock from 2×40 GBaud/s optical signals in the OTDM DQPSK modulation format.The phase noise of this clock reaches-98.62 dBc/Hz at 10 kHz frequency offset

almost equivalent to that of the microwave source（Agilent Technologies

E8267D）.Simultaneously

we use this OEO to demultiplex the functions of two tributary signals

i.e.demultiplexing 160 Gbit/s PRBS OTDM signals into two high quality 80 Gbit/s tributary signals.