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A low-frequency electrical spectrum analysis method is researched for evaluating broadband characteristics of high-speed dual-parallel Mach-Zehnder modulators (DPMZMs) based on dual-frequency modulation and fixed-frequency bias. The method enables the broadband and high-resolution evaluation for the modulation depth and half-wave voltage of a high-speed DPMZM by using a low-frequency photodetector...
An on-wafer and self-calibrated scheme is proposed and demonstrated for self-referenced microwave characterization of a silicon integrated optical transceiver. The proposed self-calibration method enables on-wafer selective extraction of microwave characteristic parameters of high-speed modulators and photodiodes in the integrated optical transceiver, without the need for extra electrical-to-optical...
Optical modulators are central to a large number of applications in photonics particularly in the area of communication as they provide the function of writing electrical data onto an optical carrier. Silicon photonics provides a route to the realisation of low cost photonic integrated circuits through fabrication which is synonymous with CMOS electronic fabrication, i.e., high volume and high yield...
Two different CS-SSB modulators based on Mach-Zehnder structure used in carrier-distributed long-reach passive optical networks are investigated and compared. The Rayleigh-backscattering beat noise tolerance and transmission performance are also discussed.
The crosstalk of rival RoF and GPON subscribers on a RoF signal in converged RoF-WDM-TDM-GPONs with SOA as reach extender is studied. SOA nonlinear crosstalk can be mitigated by control of subscriber launch power.
We demonstrate using single-sideband-carrier-suppressed (SSB-CS) signal to suppress the Rayleigh-Backscattering (RB) in a carrier-distributed PON. The SSB signal is generated by a dual-parallel Mach-Zehnder modulator (DP-MZM). The split-ratio and reach are also investigated and analyzed.
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