Double-efficiency photonic channelization enabling optical carrier power suppression

A novel double-efficiency photonic channelization scheme with optical carrier power suppression (OCS) is proposed for the first time, to the best of our knowledge. In this scheme, a tunable optical frequency comb generator is used to efficiently generate radio-frequency (RF) carriers, and a Fabry-Perot filter (FPF) is introduced to split a broadband signal into multiple narrowband signals. With the well-designed frequency of RF carriers, the wavelength spacing of optical carriers, and the free spectrum range of the FPF, double-channelized efficiency can be obtained. A proof-of-concept system is demonstrated to verify the feasibility of this double-efficiency channelization scheme, in which a 5 GHz baseband signal is channelized into five 1 GHz sub-channels, and about 35 dB OCS is obtained. Moreover, the performance of the double-efficiency channelization scheme is analyzed based on a 5 Gbit/s baseband signal with an on-off keying (OOK) format in which the influence of the 3rd order term interference is discussed.