Microresonator photonic wire bond integration for Kerr-microcomb generation

Microresonator photonic wire bond integration for Kerr-microcomb generation

Abstract Extremely high-Q microresonators provide an attractive platform for a plethora of photonic applications including optical frequency combs, high-precision metrology, telecommunication, microwave generation, narrow linewidth lasers, and stable frequency references. Moreover, the desire for co...

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Main Authors: Alain Yuji Takabayashi, Nikolay Pavlov, Victoria Rosborough, Galen Hoffman, Lou Kanger, Farzad Mokhtari Koushyar, Taran Huffman, Mike Nelson, Charles Turner, Leif Johansson, Juergen Musolf, Henry Garrett, Thomas Liu, Gordon Morrison, Yanne Chembo, Brian Mattis, Thien-An Nguyen, Mackenzie Van Camp, Steven Eugene Turner, Maxim Karpov, John Jost, Zakary Burkley
Format: Article
Language:English
Published: Nature Portfolio 2024-11-01
Series:Scientific Reports
Online Access:https://doi.org/10.1038/s41598-024-79945-4
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Summary:Abstract Extremely high-Q microresonators provide an attractive platform for a plethora of photonic applications including optical frequency combs, high-precision metrology, telecommunication, microwave generation, narrow linewidth lasers, and stable frequency references. Moreover, the desire for compactness and a low power threshold for nonlinear phenomena have spurred investigation into integrated and scalable solutions. Historically, crystalline microresonators with Q  $$\sim$$  109 were one of the first material platforms providing unprecedented optical performance in a small form factor. A key challenge, though, with these devices is in finding alternatives to fragile, bulky, and free-space couplers, such as tapered fibers, prisms, and cleaved fibers. Here, we present for the first time, the evanescent coupling of a photonic wire bond (PWB) to a MgF2-based microresonator to generate solitons and a pure, low-noise microwave signal based on Kerr-microcombs. These results open a path towards scalable integration of crystalline microresonators with integrated photonics. Moreover, because PWBs possess advantages over traditional coupling elements in terms of ease of fabrication, size, and flexibility, they constitute a more advanced optical interface for linear and nonlinear photonics.
ISSN:2045-2322

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