A5052951266- Pulsars and Gravitational Waves Research
- Advanced Fiber Laser Technologies
- Geophysics and Sensor Technology
- Advanced Frequency and Time Standards
- Geophysics and Gravity Measurements
- Photonic and Optical Devices
- Gamma-ray bursts and supernovae
- Cosmology and Gravitation Theories
- Mechanical and Optical Resonators
- Spectroscopy and Laser Applications
- Astrophysical Phenomena and Observations
- Seismic Waves and Analysis
- Cold Atom Physics and Bose-Einstein Condensates
- Radio Astronomy Observations and Technology
- Atomic and Subatomic Physics Research
- Laser-Matter Interactions and Applications
- Astrophysics and Cosmic Phenomena
- Astronomical Observations and Instrumentation
- Laser Design and Applications
- Advanced Photonic Communication Systems
- Superconducting Materials and Applications
- Solid State Laser Technologies
- Scientific Research and Discoveries
- Photorefractive and Nonlinear Optics
- Force Microscopy Techniques and Applications
National Institute of Optics
2012-2021
Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
2008-2013
University of Salerno
2008-2012
University of Naples Federico II
2008-2012
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2010-2011
Istituto Nazionale di Fisica Nucleare, Sezione di Perugia
2010
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
2010
National Institute for Astrophysics
2008
Advanced gravitational wave interferometers, currently under realization, will soon permit the detection of waves from astronomical sources. To open era precision astronomy, a further substantial improvement in sensitivity is required. The future space-based Laser Interferometer Space Antenna and third-generation ground-based observatory Einstein Telescope (ET) promise to achieve required improvements frequency ranges. vastly improved third generation observatories could detailed...
Advanced gravitational wave detectors, currently under construction, are expected to directly observe signals of astrophysical origin. The Einstein Telescope (ET), a third-generation detector, has been proposed in order fully open up the emerging field astronomy. In this paper we describe sensitivity models for ET and investigate potential limits imposed by fundamental noise sources. A special focus is set on evaluating frequency band below 10 Hz where complex mixture seismic, gravity...
Large gravitational wave interferometric detectors, like Virgo and LIGO, demonstrated the capability to reach their design sensitivity, but transform these machines into an effective observational instrument for astronomy a large improvement in sensitivity is required. Advanced detectors near future third-generation observatories more than one decade will open possibility perform astronomical observations from Earth. An overview of possible science reaches technological progress needed...
The Virgo detector has now finished its first science run; a mode duty cycle of more than 80% and 4.5 Mpc horizon distance for binary neutron star inspiral sources were achieved. Commissioning breaks organized during the run which permitted improvement sensitivity robustness interferometer against environmental perturbations like bad weather earthquakes. post-run commissioning phase started, with goal preparing next upgrade step detector, Virgo+.
Continuously pumped passive nonlinear cavities can be harnessed for the creation of novel optical frequency combs. While most research has focused on third-order "Kerr" interactions, recent studies have shown that comb formation also occur via second-order effects. Here, we report quadratic combs in parametric oscillator (OPO) configurations. Specifically, demonstrate generated region around half pump a continuously driven OPO. We model OPO dynamics through single time-domain mean-field...
We experimentally demonstrate and theoretically explain the onset of optical frequency combs in a simple cavity-enhanced second-harmonic-generation system, exploiting second-order nonlinear interactions. Two are simultaneously generated around fundamental pump frequency, with spectral bandwidth up to about 10 nm, its second harmonic. observe different regimes generation, depending on phase-matching condition for second-harmonic generation. Moreover, we develop an elemental model which...
The Virgo collaboration has just concluded its first long science run (VSR1). In these four months the detector achieved a good duty cycle, larger than 80%, and an average horizon distance for binary neutron star system sources of about 4 Mpc. An intense commissioning activity was resumed after complete to further increase performances prepare Virgo+ upgrades. during last achievements are briefly discussed here.
Abstract Quadratic nonlinear processes are currently exploited for frequency comb transfer and extension from the visible near infrared regions to other spectral ranges where direct generation cannot be accomplished. However, has been directly observed in continuously pumped quadratic crystals placed inside an optical cavity. At same time, introductory theoretical description of phenomenon provided, showing a remarkable analogy with dynamics third-order Kerr microresonators. Here, we give...
We present a widely-tunable, singly-resonant optical parametric oscillator, emitting more than 1 W between 2.7 and 4.2 μm, which is phase locked to self-referenced frequency comb. Both pump signal frequencies are directly phase-locked the comb of NIR-emitting fs mode-locked fibre laser, linked, in turn, caesium primary standard. estimate for idler fractional Allan deviation ∼ 3 × 10⁻¹²τ⁻½ 200 s. To test spectroscopic performance OPO, we carried out saturation spectroscopy several transitions...
Entang-Like is an interactive game that intuitively illustrates quantum entanglement using bistable images. Designed to make mechanics more accessible, it provides a hands-on analogy for this fascinating phenomenon, turning complex concepts into engaging and funny experience.
We demonstrate continuous-wave cavity ring-down spectroscopy of a partially hydrodynamic molecular beam emerging from buffer-gas-cooling source.
Nowadays, buffer-gas cooling represents an invaluable option to produce cold stable molecules, both in view of secondary cooling/trapping strategies towards the achievement quantum degeneracy and for fundamental studies complex molecules. From this follows a demand establish pool specialized, increasingly precise spectroscopic interrogation techniques. Here, we demonstrate general approach Lamb-dip ro-vibrational spectroscopy buffer-gas-cooled The saturation intensity selected molecular...
We stabilize the idler frequency of a singly resonant optical parametric oscillator directly to resonance mid-infrared Fabry-Perot reference cavity. This is accomplished by Pound-Drever-Hall locking scheme, controlling either pump laser or signal frequency. A residual relative noise power spectral density below 10(3) Hz(2)/Hz reached on average, with Gaussian linewidth 920 Hz over 100 ms, which reveals potential for reaching purity down hertz level against cavity state-of-the-art superior...
We present a narrow-linewidth, singly-resonant cw optical parametric oscillator, emitting more than 1 W in the 2.7–4.2 µm range. The OPO is pumped by narrow linewidth (40 kHz) fibre-laser system and signal frequency locked to high-finesse Fabry–Pérot cavity order increase spectral resolution, thus obtaining residual of 70 kHz for signal. tested performance our on several transitions ν1 rovibrational band CH3I, measuring line intensities showing sub-Doppler dip detection.
We report on a widely (2.25 THz or 75 cm(-1)) and rapidly (4.5 THz/s) mode-hop-free (MHF) tunable mid-IR laser source at ~3.3 μm, consisting of 5%-MgO:LiNbO(3) singly resonant optical parametric oscillator (SRO) pumped by an automated broadly MHF extended-cavity diode (ECDL). The broad rapid tuning capability the ECDL is readily transferred to SRO idler wave owing quasi-noncritical pump spectral acceptance bandwidth quasi-phase-matching. Fast broadband high-resolution Doppler spectroscopy...
We report a thorough analysis of the spectral properties an ytterbium-doped fibre amplifier, seeded by Nd:YAG laser, whose linewidth has been narrowed down to 1 Hz locking laser ultrastable reference cavity. measured phase noise contribution from showing that it does not depend on amplification gain, nor seed linewidth. Moreover, amplifier-induced affect final linewidth, as verified heterodyne measurement within 0.2 resolution bandwidth our acquisition set-up. Preservation purity below...
Buffer gas cooling with a 4He is used to perform laser-absorption spectroscopy of the 12C2H2 (υ1 + υ3) band at cryogenic temperatures. Doppler thermometry first carried out extract translational temperatures from recorded spectra. Then, rotational down 20 K are retrieved by fitting Boltzmann distribution relative intensities several ro-vibrational lines. The potential our setup tune thermal equilibrium between and degrees freedom also demonstrated. This can be reproduce in controlled way...
Einstein gravitational-wave Telescope (ET) is a design study funded by the European Commission to explore technological challenges of and scientific benefits from building third generation gravitational wave detector. The three-year study, which concluded earlier this year, has formulated conceptual an observatory that can support implementation new technology for next two three decades. goal talk introduce audience overall aims objectives project enumerate ET's potential influence our...
The VIRGO interferometer is the largest ground based European gravitational wave detector operating at EGO Laboratory in Pisa, Italy; countryside. During last commissioning period relevant progress have been done approaching its design sensitivity all over detection bandwidth. Thanks to effort of whole Collaboration a long scientific run has collecting data for more than 4 months conjunction with LIGO detectors. results obtained from point view are: very good stability and duty-cycle as high...
In this paper, we present experimental evidence of a third-order nonlinear optical process, self-induced spin-to-orbital conversion (SISTOC) the photon angular momentum. This effect is physical mechanism at origin depolarization very intense laser beams propagating in isotropic materials. The SISTOC like self-focusing, triggered by heating leading to radial temperature gradient medium. work tested occurrence terbium-gallium-garnet rod for an impinging power about 100 W. To study process used...
The first Virgo long science run (VSR1) lasted 136 days, from 18th May 2007. During the several noise sources were identified and reduced; this significantly improved detector sensitivity between start end of run. We describe three studies, showing how data monitoring programs simple analysis tools permitted detection provided useful information regarding its origin.