A Ring-Based 25 Gb/s DAC-Less PAM-4 Modulator | Zendy

Mohammed Shafiqul Hai | Zendy; Monireh Moayedi Pour Fard | Zendy; Odile Liboiron-Ladouceur | Zendy

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A Ring-Based 25 Gb/s DAC-Less PAM-4 Modulator

Author(s) -

Mohammed Shafiqul Hai,

Monireh Moayedi Pour Fard,

Odile Liboiron-Ladouceur

Publication year - 2016

Publication title -

ieee journal of selected topics in quantum electronics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.131

H-Index - 159

eISSN - 1558-4542

pISSN - 1077-260X

DOI - 10.1109/jstqe.2016.2584978

Subject(s) - engineered materials, dielectrics and plasmas , photonics and electrooptics

A novel PAM-4 12.5 Gbaud/s inter-coupling modulator based on a Mach-Zehnder interferometer assisted ring resonator is demonstrated. The 25 Gb/s PAM-4 optical signal is generated by driving the modulator with two independent electrical signals with an amplitude of 3 V_pp at 2 V reverse bias. Reverse bias operation mode of the modulator enables achieving an electro-optic (EO) bandwidth of approximately 14 GHz without preemphasis of the electrical driving signals or equalization techniques. This configuration successfully simplifies the operation of the modulator in generating PAM-4 signals without the need for a digital-to-analog converter (DAC). Experimental results show proper generation of a PRBS data stream. The proposed modulator has a compact footprint of 0.48 mm² with a bandwidth density of 52.08 Gb/s/mm².

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