Microwave resonator-enabled broadband on-chip electro-optic frequency comb generation
Zhaoxi Chen, Yiwen Zhang, Hanke Feng, Yuansong Zeng, Ke Zhang, and, Cheng Wang

TL;DR
This paper introduces a power-efficient, on-chip electro-optic frequency comb generator using microwave resonator electrodes on a lithium niobate platform, achieving broadband combs with reduced power and no isolators.
Contribution
The authors develop a microwave resonator-enabled electro-optic comb generator with over three times power reduction and broadband span, improving practicality for integrated photonics applications.
Findings
Achieved >85 nm comb span at 740 mW power.
Reduced electrical power consumption by over three times.
Demonstrated broadband comb generation without RF isolators.
Abstract
Optical frequency combs play a crucial role in optical communications, time-frequency metrology, precise ranging, and sensing. Among various generation schemes, resonant electro-optic combs are particularly attractive for its excellent stability, flexibility and broad bandwidths. In this approach, an optical pump undergoes multiple electro-optic modulation processes in a high-Q optical resonator, resulting in cascaded spectral sidebands. However, most resonant electro-optic combs to date make use of lumped-capacitor electrodes with relatively inefficient utilization of the input electrical power. This design also reflects most electrical power back to the driving circuits and necessitates costly RF isolators in between, presenting substantial challenges in practical applications. To address these issues, we present an RF circuit friendly electro-optic frequency comb generator…
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Taxonomy
TopicsAdvanced Fiber Laser Technologies · Photonic and Optical Devices · Acoustic Wave Resonator Technologies
