Ivan Cardea
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View article: Limits on Atmospheric Broadening of the HBT Peak Using High-Speed Single-Photon Detectors
Limits on Atmospheric Broadening of the HBT Peak Using High-Speed Single-Photon Detectors Open
View article: QUASAR: Achieving Picosecond-Scale Time Synchronization in Distributed Optical and Cherenkov Telescopes with White Rabbit
QUASAR: Achieving Picosecond-Scale Time Synchronization in Distributed Optical and Cherenkov Telescopes with White Rabbit Open
View article: The QUASAR project: reaching 10 microarcsec in the optical to resolve accretion disks
The QUASAR project: reaching 10 microarcsec in the optical to resolve accretion disks Open
View article: QUASAR: Development of 20 picosecond resolution intensity interferometry
QUASAR: Development of 20 picosecond resolution intensity interferometry Open
View article: Probing Stellar Kinematics with the Time-Asymmetric Hanbury Brown and Twiss Effect
Probing Stellar Kinematics with the Time-Asymmetric Hanbury Brown and Twiss Effect Open
Intensity interferometry (II) offers a powerful means to observe stellar objects with a high resolution. In this work, we demonstrate that II can also probe internal stellar kinematics by revealing a time-asymmetric Hanbury Brown and Twiss…
View article: Cost-effective equalization of electro-optic frequency combs in a Sagnac interferometer
Cost-effective equalization of electro-optic frequency combs in a Sagnac interferometer Open
We present a cost-effective electro-optic frequency comb generation and equalization method using a single phase modulator inserted in a Sagnac interferometer layout. The equalization relies on the interference of comb lines generated in b…
View article: Unconventional time-bandwidth performance of resonant cavities with nonreciprocal coupling
Unconventional time-bandwidth performance of resonant cavities with nonreciprocal coupling Open
Funding: Hellenic Foundation for Research and Innovation (HFRI), General Secretariat for Research and Technology (GSRT) (No. 1819) (KLT).
View article: Probing unconventional performance of fiber resonators: light storage, generation and manipulation
Probing unconventional performance of fiber resonators: light storage, generation and manipulation Open
This thesis aims at investigating the performance of figure-9 (figure-of-nine) optical fiber resonators as a practical solution for light storage, light generation and manipulation. The first part of the thesis focuses on a theoretical and…
View article: Arbitrarily high time bandwidth performance in a nonreciprocal optical resonator with broken time invariance
Arbitrarily high time bandwidth performance in a nonreciprocal optical resonator with broken time invariance Open
View article: Theoretical and numerical study of the time-bandwidth product in resonant cavities with nonreciprocal coupling
Theoretical and numerical study of the time-bandwidth product in resonant cavities with nonreciprocal coupling Open
We present a theoretical and numerical model to show how the nonreciprocal coupling in a generalized resonator affects the balance between the reflected and intracavity power as well as the time-bandwidth product of the system.
View article: A nonreciprocal optical resonator with broken time-invariance for arbitrarily high time-bandwidth performance
A nonreciprocal optical resonator with broken time-invariance for arbitrarily high time-bandwidth performance Open
Most present-day resonant systems, throughout physics and engineering, are characterized by a strict time-reversal symmetry between the rates of energy coupled in and out of the system, which leads to a trade-off between how long a wave ca…
View article: Demonstrating a non-reciprocal optical resonator for unlimited time-bandwidth performance
Demonstrating a non-reciprocal optical resonator for unlimited time-bandwidth performance Open
Typical, reciprocal resonant systems are always limited to a time-bandwidth product of 1, causing a fundamental trade-off between long storage times and large acceptance bandwidths. A recent theory suggests that this limit may be arbitrari…
View article: Experimental and theoretical investigation of the operating principles of the Figure-9 laser
Experimental and theoretical investigation of the operating principles of the Figure-9 laser Open
We present a theoretical vectorial model, validated by experimental measurements, describing the dependence of the Figure-9 laser output power, operating in continuous wave, on the coupling ratio of the directional coupler.
View article: 496 Gb/s direct detection DMT transmission over 40 km single mode fibre using an electrically packaged silicon photonic modulator
496 Gb/s direct detection DMT transmission over 40 km single mode fibre using an electrically packaged silicon photonic modulator Open
We present the characterization of a silicon Mach-Zehnder modulator with electrical packaging and show that it exhibits a large third-order intermodulation spurious-free dynamic range (> 100 dB Hz2/3). This characteristic render…