A5011031321- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Orbital Angular Momentum in Optics
- Terahertz technology and applications
- Spectroscopy and Laser Applications
- Quantum optics and atomic interactions
- Advanced X-ray Imaging Techniques
- Optical Polarization and Ellipsometry
- Mechanical and Optical Resonators
- Superconducting and THz Device Technology
- Advanced X-ray and CT Imaging
- Particle Accelerators and Free-Electron Lasers
- Gyrotron and Vacuum Electronics Research
- Atomic and Subatomic Physics Research
- Neutrino Physics Research
- Geophysics and Sensor Technology
- Quantum Information and Cryptography
- Atmospheric Ozone and Climate
- Radiation Detection and Scintillator Technologies
- Particle accelerators and beam dynamics
- Laser-Plasma Interactions and Diagnostics
- Photorefractive and Nonlinear Optics
- Advancements in Photolithography Techniques
- Atomic and Molecular Physics
- Experimental and Theoretical Physics Studies
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
2020-2024
Istituto Nazionale di Fisica Nucleare
2020-2024
University of Milan
2019-2024
Istituto di Fotonica e Nanotecnologie
2019
Politecnico di Milano
2019
Single-cycle, high-power, high-repetition-rate THz pulse sources are becoming the cornerstone of several scientific and industrial applications. A promising versatile method for high-power generation is optical rectification in nonlinear crystals pumped by powerful near-infrared ultrafast laser systems. In this context, ytterbium-based particularly advantageous terms power scalability technology establishment. However, as repetition rate increases toward hundreds MHz, conversion efficiency...
We present a conceptual design for compact X-ray Source BriXS (Bright and Source). BriXS, the first stage of Marix project, is an Inverse Compton (ICS) based on superconducting cavities technology electron beam with energy recirculation laser system in Fabry-Pérot cavity at repetition rate 100 MHz, producing 20–180 keV monochromatic X-Rays devoted mainly to medical applications. An recovery scheme modified folded push-pull CW-SC twin Energy Recovery Linac (ERL) ensemble allows us sustain...
In this work we experimentally demonstrate high sensitive strictly-local identification of azimuthal index Laguerre–Gauss (LG) beams, with less than 160 photon counts. To aim, detection the LG beams is performed an innovative interferometer relying on a monolithic birefringent crystal, thus ensuring stability without need any feedback or thermal drift compensation. By first generating reference interference pattern standard TEM00 mode, then detect value beam from lateral shift respect to...
We address the use of optical parametric oscillator (OPO) to counteract phase diffusion, and demonstrate phase-noise reduction for coherent signals traveling through a suitably tuned OPO. In particular, we theoretically experimentally show that there is threshold value on noise, above which OPO can be exploited ``squeeze'' noise. The depends energy input state, relevant parameters OPO, i.e., gain input-output crystal loss rates.
We report on the dependence of frequency-to-intensity noise conversion in locking an ultrafast laser against a high-finesse optical resonator from Carrier Envelope Offset (CEO) frequency. By proper combination cavity finesse and CEO frequency it is possible to optimize signal-to-noise ratio intensity trapped into resonator. The theoretical description problem together with numerical simulations experimental results are presented aim strong suppression fluctuations field.
A general-purpose method based on the implementation of asymmetric Pound–Drever–Hall (PDH) technique is proposed to measure carrier-envelope offset (CEO) frequency a mode-locked laser using an external optical cavity. By analyzing synchronously demodulated signal spectrally filtered cavity reflection when resonator locked laser, discriminating depending relative between and comb-like spectra obtained. For given geometry group delay dispersion (GDD) parameters (i.e., known mode offset), this...
We report on a novel and general measurement technique to characterize the finesse of optical resonators. The method retrieves cavity transmission profile coefficient by using an amplitude modulation probe beam synchronous detection scheme. Both real imaginary parts can be accurately measured. Validation is performed two different configurations, linear ring resonator, probed both continuous-wave mode-locked laser sources. A comparison with respect conventional cavity-ring-down scheme shows...
In this work, we study the generation of THz radiation using a GaP crystal inside an enhancement cavity, simulating effect high power on cavity modes, and calculating expected performances.
We report on GaP crystal characterization for the generation of milliwatt-level THz radiation inside an enhancement resonator pumped by near-infrared pulses, with aim overcoming high-average power and nonlinear absorption limits.
In the field of rare event physics, it is common to have huge masses organic liquid scintillator as detection medium. particular, they are widely used study neutrino properties or astrophysical neutrinos. Thanks its safety (such low toxicity and high flash point) easy scalability, linear alkyl benzene most solvent produce scintillators for large mass experiments. The knowledge refractive index a pivotal point understand detector response, this quantity (and wavelength dependence) affects...
In the field of rare event physics, it is common to have huge masses organic liquid scintillator as detection medium. particular, they are widely used study neutrino properties or astrophysical neutrinos. Thanks its safety (such low toxicity and high flash point) easy scalability, linear alkyl benzene most solvent produce scintillators for large mass experiments. The knowledge refractive index a pivotal point understand detector response, this quantity (and wavelength dependence) affects...
We design and demonstrate a novel technique for the active stabilization of relative phase between seed pump in an optical parametric oscillator (OPO). show that two error signals OPO frequency, based on Pound-Drever-Hall (PDH), seed-pump can be obtained just from reflected beam cavity, without necessity different modulation demodulation stages. also analyze effect cavity configurations, resulting offset PDH signal, which has to compensated. Finally, application our reliable generation...
We propose an innovative monolithic interferometer to distinguish the topological charge of radiation carrying orbital angular momentum. Remarkably, our method requires access only a small portion entire wavefront. The proposed scheme relies on birefringent crystal, and as such it is intrinsically stable does not require any feedback or thermal drift compensation. An experimental setup has been realized prove effectiveness down photon counting regime.
We address the use of a calcite crystal-based local detector to discrimination orbital angular momentum quantum radiation produced by parametric down conversion. demonstrate that can be obtained exploiting introduction fine and controlled spatial shift between two replicas state in crystals. believe this technology could used for future development long-distance communication techniques, where information encoding is based on momentum.
We propose an experimental method for the generation of coherent terahertz radiation in spec-tral region between 0.2 THz and 2 THz, with a high repetition rate nearly 100 MHz, average power at milliwatt level. An Ytterbium-doped mode locking laser is amplified to 60 W, pulses are stacked into optical cavity up 750 W. There, they interact Gallium Phosphide crystal producing via rectification. With enhanced configuration, we show that more than one order magnitude can be gained respect simply...
We report on the dependence of frequency-to-intensity noise conversion in locking an ultrafast laser against a high-finesse optical resonator from Carrier Envelope Offset (CEO) frequency. By proper combination cavity finesse and CEO frequency it is possible to optimize signal-to-noise ratio intensity trapped into resonator. The theoretical description problem together with numerical simulations experimental results are presented aim strong suppression fluctuations field.
We propose an innovative method to shift the transversal position of focal point optical cavity keeping it actively stabilized. Our is a 4 mirrors bow-tie and spatial resonant mode obtained by properly rotating two curved piezo actuators. This allows us move $135 μm$ in time $50 ms$, resonance condition means Pound-Drever-Hall technique. use this technique for generation 2-color X-rays via Inverse Compton Scattering (ICS). exploits large average power stored high finesse shifting laser beam...