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physics.optics2026
All-band photonic integrated optical parametric amplification
Nikolai Kuznetsov, Zihan Li, Tobias J. Kippenberg
Optical amplifiers are ubiquitous in science and technology and are the workhorse of modern communications. Currently, virtually all amplifiers rely on atomic resonances, such as r…
physics.optics2025
Watt-level second harmonic generation in periodically poled thin-film lithium tantalate
Nikolai Kuznetsov, Zihan Li, Tobias J. Kippenberg
Second-harmonic generation (SHG) is a fundamental tool in modern laser technology, enabling coherent frequency conversion to remote optical bands, serving as the basis for self-ref…
physics.optics2024
An ultra-broadband photonic-chip-based traveling-wave parametric amplifier
Nikolai Kuznetsov, Alberto Nardi, Johann Riemensberger +4
Optical amplification, crucial for modern communication and data center interconnects, primarily relies on erbium-doped fiber amplifiers (EDFAs) to enhance signals without distorti…