Programmable Single-Bandpass Photonic RF Filter Based on Kerr Comb from a Microring

Microresonators with a high Kerr nonlinearity show great potential to generate optical frequency combs with ultrabroad spectra, high repetition rate, and high coherence between comb lines. The compact size and possibility of chip-level integration make the Kerr combs attractive for many applications...

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Bibliographic Details
Published in:Journal of lightwave technology 2014-10, Vol.32 (20), p.3557-3565
Main Authors: Xue, Xiaoxiao, Xuan, Yi, Kim, Hyoung-Jun, Wang, Jian, Leaird, Daniel E., Qi, Minghao, Weiner, Andrew M.
Format: Article
Language:English
Subjects:
Kerr effect
microwave filters
microwave photonics
Optical fiber filters
optical frequency combs
Optical imaging
Optical pulse shaping
optical resonators
Passband
Photonics
Radio frequency
Silicon nitride
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Summary:Microresonators with a high Kerr nonlinearity show great potential to generate optical frequency combs with ultrabroad spectra, high repetition rate, and high coherence between comb lines. The compact size and possibility of chip-level integration make the Kerr combs attractive for many applications, especially including photonic radiofrequency (RF) filters. In this paper we report the first demonstration of a programmable photonic RF filter based on the Kerr comb from a silicon nitride microring. A novel scheme enabled by the large frequency spacing of the Kerr comb is introduced in order to suppress unwanted RF passbands including the image and periodic passbands. As a result, a single passband is achieved. To the best of our knowledge, this is the first demonstration of a single-bandpass photonic RF filter employing a discrete-wavelength comb source.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2014.2312359