Dispersion tailoring in wedge microcavities for Kerr comb generation

Dispersion tailoring in wedge microcavities for Kerr comb generation

The shaping of group velocity dispersion in microresonators is an important component in the generation of wideband optical frequency combs. Small resonators - with tight bending radii - offer the large free-spectral range desirable for wide comb formation. However, the tighter bending usually limit...

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Veröffentlicht in:arXiv.org 2020-03
Hauptverfasser: Fujii, Laís, Marvyn Inga, Soares, Jorge H, Yovanny A V Espinel, Mayer Alegre, Thiago P, Wiederhecker, Gustavo S
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Sprache:eng
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Bend radius
Broadband
Dispersion
Group velocity
Microcavities
Optical frequency
Physics - Optics
Silicon dioxide
Wedges
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Marvyn Inga
Soares, Jorge H
Yovanny A V Espinel
Mayer Alegre, Thiago P
Wiederhecker, Gustavo S
description The shaping of group velocity dispersion in microresonators is an important component in the generation of wideband optical frequency combs. Small resonators - with tight bending radii - offer the large free-spectral range desirable for wide comb formation. However, the tighter bending usually limit comb formation as it enhances normal group velocity dispersion. We experimentally demonstrate that engineering the sidewall angle of small-radius (100 \(\mu\)m), 3 \(\mu\)m-thick silica wedge microdisks enables dispersion tuning in both normal and anomalous regimes, without significantly affecting the free spectral range. A microdisk with wedge angle of \(55^{\circ}\) (anomalous dispersion) is used to demonstrate a 300 nm bandwidth Kerr optical frequency comb.
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subjects Bend radius
Broadband
Dispersion
Group velocity
Microcavities
Optical frequency
Physics - Optics
Silicon dioxide
Wedges
title Dispersion tailoring in wedge microcavities for Kerr comb generation
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