We propose and experimentally demonstrate a novel scheme to generate multichannel optical frequency-locked multicarrier by using multichannel recirculating frequency shifter (MC-RFS) loop. By using MC-RFS loop, we can generate N channels subcarriers each round trip without interference. These subcarriers of each channel are stable and frequency-locked, which can be used for a multichannel WDM source. Finally, the double channels RFS loop is carried out for demonstration in our experiment with double-carriers source. Using this scheme, we successfully generate 54 frequency-locked subcarriers with 25 GHz frequency spacing in two channels and each channel has 27 tones.
[Show abstract][Hide abstract] ABSTRACT: We propose and experimentally demonstrate an improved scheme to generate optical frequency-locked multi-channel multi-carriers (MCMC), using a gain-independent multi-channel recirculating frequency shifter (MC-RFS) loop based on single sideband (SSB) modulation. We re-build the RFS structure with better performance. By using MC-RFS loop, we can generate N-channel subcarriers each round trip without interference. These subcarriers of each channel are stable and frequency-locked, which can be used for multi-channel WDM source. The dual-channel RFS loop is carried out for demonstration in our experiment with dual-carrier source. Using this scheme, we successfully generate 62 frequency-locked subcarriers with 25-GHz frequency spacing in 2 channels and each channel has 31 tones.
[Show abstract][Hide abstract] ABSTRACT: A novel scheme by inserting an Asymmetry Mach-Zehnder Interferometer (AMZI) in Recirculating Frequency Shifter (RFS) loop is proposed. Using this scheme, tone-to-noise ratio (TNR) of Optical Frequency Comb can be enhanced by suppressing the accumulated amplified spontaneous emission (ASE) noise. An optical frequency comb with 49 tones based on this method was generated. The experimental results are in good accordance with the theoretical and numerical analyses. It is shown that TNR of the optical frequency comb generated by the improved scheme can be as high as 37.5dB.
2013 6th International Conference on Advanced Infocomm Technology (ICAIT); 07/2013
[Show abstract][Hide abstract] ABSTRACT: In this paper, a novel wired/wireless access integrated radio-over-fiber passive optical network (RoF-PON) system that utilizes scalable multiple-frequency millimeter-wave (MF-MMW) generation based on tunable optical frequency comb (TOFC) is proposed. The TOFC is performed by cascading a phase modulator (PM) and two intensity modulators (IMs), and with proper selection of the peak-to-peak voltage of the PM, a flat and effective optical comb with tens of frequency lines is achieved. The MF-MMWs are generated by beating the optical comb line pairs with an interval about 60GHz. The feasibility and scalability of the proposed wired/wireless access integrated RoF-PON scheme are confirmed by the simulations of simultaneous distribution of wired and wireless data with the proposed multiple frequency MMW generation technology.
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