Ultra Linear Modulator with High Output RF Gain Using a 12 MMI Coupler

Peng YUE  Qian-nan LI  Xiang YI  Tuo WANG  Zeng-ji LIU  Geng CHEN  Hua-xi GU  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E95-C   No.12   pp.1883-1886
Publication Date: 2012/12/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E95.C.1883
Print ISSN: 0916-8516
Type of Manuscript: BRIEF PAPER
Category: Lasers, Quantum Electronics
Keyword: 
Electro-optic modulator,  multimode interference (MMI) coupler,  microring resonator,  spurious-free-dynamic-range (SFDR),  output RF gain,  

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Summary: 
A novel and compact electro-optic modulator implemented by a combination of a 12 multimode interference (MMI) coupler and an integrated Mach-Zehnder interferometer (MZI) modulator consisting of a microring and a phase modulator (PM) is presented and analyzed theoretically. It is shown that the proposed modulator offers both ultra-linearity and high output RF gain simultaneously, with no requirements for complicated and precise direct current (DC) control.