Showing papers by "Amnon Yariv published in 2019"
TL;DR: Dual-locked counterpropagating solitons having slightly different repetition rates were used to implement a vernier spectrometer that enabled characterization of laser tuning rates as high as 10 terahertz per second, broadly step-tuned lasers, multiline laser spectra, and molecular absorption lines.
Abstract: Determination of laser frequency with high resolution under continuous and abrupt tuning conditions is important for sensing, spectroscopy, and communications. We show that a single microresonator provides rapid and broadband measurement of optical frequencies with a relative frequency precision comparable to that of conventional dual-frequency comb systems. Dual-locked counterpropagating solitons having slightly different repetition rates were used to implement a vernier spectrometer, which enabled characterization of laser tuning rates as high as 10 terahertz per second, broadly step-tuned lasers, multiline laser spectra, and molecular absorption lines. Besides providing a considerable technical simplification through the dual-locked solitons and enhanced capability for measurement of arbitrarily tuned sources, our results reveal possibilities for chip-scale spectrometers that exceed the performance of tabletop grating and interferometer-based devices.
88 citations
03 Mar 2019
TL;DR: It is demonstrated that high-coherence Si/III-V hybrid lasers are much more robust than conventional III-V DFB lasers against both coherent and incoherent optical feedback by examining the frequency noise power spectral density of the lasers.
Abstract: We demonstrate that high-coherence Si/III-V hybrid lasers are much more robust than conventional III-V DFB lasers against both coherent and incoherent optical feedback by examining the frequency noise power spectral density of the lasers.
6 citations
03 Mar 2019
TL;DR: A hybrid Si/III-V semiconductor laser is demonstrated to carry 20-Gbaud 16- and 64-QAM data signals over an 80-km fiber and the high coherence of the laser enables below FEC threshold performance after transmission.
Abstract: We have demonstrated the use of a hybrid Si/III-V semiconductor laser to carry 20-Gbaud 16- and 64-QAM data signals over an 80-km fiber. The high coherence of the laser enables below FEC threshold performance after transmission.
3 citations
05 May 2019
TL;DR: In this article, a self-locked counter-propagating soliton frequency combs in a high-Q silica microresonator were used for fast tuning laser waveforms and molecular absorption features.
Abstract: A spectrometer is demonstrated using self-locked counter-propagating soliton frequency combs in a high-Q silica microresonator. Fast tuning laser waveforms and molecular absorption features are measured with kiloHertz to MegaHertz resolution. © 2019 The Author(s)
1 citations
Patent•
11 Jul 2019TL;DR: In this article, the optical mode of a photonic device is coupled between a first region made of a semiconducting material, and a second region making of a dielectric material, where the thickness of the first region and its width are controlled to determine its effective refractive index.
Abstract: The optical mode of a photonic device is coupled between a first region made of a semiconducting material, and a second region made of a dielectric material. Photons are generated within the first region, while the optical mode is predominantly stored within the second region. The thickness of the first region and its width are controlled to determine its effective refractive index, enabling control of the optical mode.