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Demonstration of optical multicasting using Kerr frequency comb lines.
Optics Letters
|August 13, 2016
Summary
Optical multicasting was achieved using silicon nitride microresonator Kerr frequency combs. Low-noise combs enabled high-quality signal multicasting, while high-noise combs degraded copy quality.
Area of Science:
- Photonics
- Optical Communications
- Materials Science
Background:
- Kerr frequency combs are crucial for optical signal processing.
- Optical multicasting is essential for high-capacity communication networks.
- Silicon nitride microresonators offer a promising platform for generating Kerr combs.
Purpose of the Study:
- To demonstrate optical multicasting using Kerr frequency combs.
- To investigate the impact of comb noise properties on multicasting performance.
- To optimize Kerr comb generation for enhanced multicasting fidelity.
Main Methods:
- Generation of Kerr frequency combs in a silicon nitride microresonator.
- Tuning pump wavelength to control comb noise properties.
- Utilizing a periodically poled lithium niobate waveguide for multicasting.
- Characterization of signal quality and wavelength conversion efficiency.
Main Results:
- Achieved seven-fold multicasting of 20 Gbaud quadrature phase-shift-keyed signals.
- Achieved four-fold multicasting of 16-quadrature amplitude modulation signals.
- Demonstrated that low-phase-noise combs yield high-quality multicast copies.
- Observed similar wavelength conversion efficiency for both low-noise and high-noise combs, but significantly degraded signal quality for high-noise combs.
Conclusions:
- Kerr frequency combs from silicon nitride microresonators are effective for optical multicasting.
- Comb phase noise critically impacts the quality of multicast signals.
- Low-noise Kerr combs are essential for high-fidelity optical multicasting.
