Spacing and Wavelength Tunable Frequency Comb
Yijia Cai, Zhixin Liu

TL;DR
This paper presents a cavity-less optical frequency comb system with tunable wavelength and tone spacing, maintaining a stable spectral profile, high power, and broad bandwidth, suitable for advanced optical applications.
Contribution
The authors introduce a novel, tunable, cavity-less OFC system that preserves spectral shape during tuning, combining electro-optic comb generation with parametric spectral broadening.
Findings
Tone spacing tunable from 25 to 32 GHz
Wavelength tunable from 1548 to 1568 nm
High output power (>2 W) and broad bandwidth (>90 nm)
Abstract
Optical frequency combs are increasingly used in applications such as optical communications, radio signal processing, and dual-comb spectroscopy. Many of these applications require a broad, flat spectrum with tunable center wavelength and tone spacing, while maintaining a consistent spectral profile. However, most existing OFC generators either lack tunability or cannot preserve their spectral shape during tuning. In this paper, we demonstrate a cavity-less OFC system based on an electro-optic comb combined with parametric spectral broadening, achieving tone spacing tunability from 25 to 32 GHz and wavelength tunability from 1548 to 1568 nm. Our OFC features high output power (greater than 2 W), broad bandwidth (greater than 90 nm), high optical signal-to-noise ratio (OSNR greater than 25 dB), and, critically, a preserved spectral profile. We show that this consistent spectral shape…
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Taxonomy
TopicsAdvanced Fiber Laser Technologies · Photonic and Optical Devices · Advanced Fiber Optic Sensors
