Patent ID: 7583868

Claim:
A full 3R (re-timing, re-shaping, re-amplifying) recovery system comprising: a self-pulsating laser diode (SP-LD) outputting a recovered optical clock signal from an inputted distorted optical signal; an electroabsorption modulator (EAM) receiving the recovered optical clock signal and the inputted distorted optical signal and recovering an optical signal based on the recovered optical clock signal, and a passive waveguide having a first output terminal and a second output terminal, the passive waveguide connecting the SP-LD and EAM, wherein all of the SP-LD for 3R recovery, the EAM for 3R recovery, and the passive waveguide connecting the SP-LD and EAM are integrated and disposed on a same surface of a semiconductor substrate, wherein the inputted distorted optical signal is inputtable directly to the integrated full 3R recovery system to obtain an optical clock signal and a 3R-recovered signal without electrical optical transformation such that optical coupling loss is less than in the case where separate elements are combined, and wherein the EAM is formed in and integrated with the first output terminal of the passive waveguide and the SP-LD is formed in and integrated with the second output terminal of the passive waveguide to reduce the optical coupling loss.