Title :
Charge–Discharge Digital/Analog Microring Modulator With No Intrinsic Speed Limitation
Author :
Kodanev, Anna ; Orenstein, Meir
Author_Institution :
Dept. of Electr. Eng., Technion - Israel Inst. of Technol., Haifa, Israel
Abstract :
Coupling modulation in microring resonators substantiates a compact and high bandwidth silicon photonics modulation scheme. In this letter, we present large-signal analysis elucidating that the main drawback of this scheme is the cavity energy decay during analog and digital modulation. Then, we propose a solution, charge-discharge configuration, having two optical inputs to compensate for the power drainage from the ring. This new modulator exhibits RF-bandwidth and extinction ratio not limited by Q-factor with virtually unlimited modulation bandwidth. We emphasize an Orthogonal Frequency-Division Multiplexing (OFDM) modulation format at 50 GHz and show it is feasible on a silicon photonics platform.
Keywords :
OFDM modulation; Q-factor; digital-analogue conversion; discharges (electric); elemental semiconductors; integrated optics; micromechanical resonators; optical modulation; silicon; Q-factor; RF-bandwidth; Si; analog modulation; cavity energy decay; charge-discharge configuration; charge-discharge digital/analog microring modulator; digital modulation; extinction ratio; frequency 50 GHz; large-signal analysis; orthogonal frequency-division multiplexing modulation format; power drainage; silicon photonics platform; Cavity resonators; Couplings; Optical coupling; Optical modulation; Optical resonators; Optical waveguides; Amplitude modulation; electrooptic modulators; microring resonators; photonic integrated circuits;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2326038
