| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To separate a low-speed optical pulse signal from an ultra high-speed optical pulse signal. <P>SOLUTION: A clock regenerating device 16 regenerates a base rate clock pulse from an input optical pulse signal. A short pulse light source 18 outputs a photonic clock with a wavelengthλp in accordance with an output clock of the device 16. An output photonic clock of a short pulse light source 18 is made incident on a saturable absorbing optical element 14 via a variable optical delay device 20, an optical amplifier 22, and an optical circulator 24. The saturable absorbing optical element 14 separates a base rate optical pulse signal from input pulse signal light with reciprocal absorption modulating effect. An optical pulse signal with a wavelengthλs output from the saturable absorbing optical element 14 is made incident on nonlinear waveform shapers 32, 34, 36 via the optical circulator 24 and an optical bandpass filter 32 which transmits light with the wavelengthλs and cuts off light with the wavelengthλp. The nonlinear waveform shapers suppress other remaining channel components. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
