7 research outputs found
Low frequency-to-intensity noise conversion in a pulsed laser cavity locking by exploiting carrier envelope offset
We report on the dependence of the frequency-to-intensity noise conversion in the locking of an ultrafast laser against a high-finesse optical enhancement resonator from the carrier envelope offset frequency. By a proper combination of the cavity finesse and laser carrier envelope offset frequency, it is possible to optimize the signal-to-noise ratio of the laser intensity trapped into the optical resonator. In this paper, we describe the effect of the laser-enhancement cavity coupling on the intracavity power relative noise, and we demonstrate both theoretically and experimentally its reduction
A new method for spatial mode shifting of stabilized optical cavities for the generation of dual-color X-rays
We propose an innovative method to shift the transversal position of the focal point of an optical cavity keeping it actively frequency stabilized. Our cavity is a 4 mirrors bow-tie cavity and the spatial shift of the resonant mode is obtained by properly rotating the two curved mirrors by piezo actuators. This method allows us to move the transversal position of the cavity focal point of 135 µm in a time of 50 ms, keeping the resonance condition of the cavity by means of the Pound–Drever–Hall technique. We propose to use this technique for the generation of 2-color X-rays via Inverse Compton Scattering (ICS). This technique exploits the large average power stored in the high finesse cavity by shifting the laser beam with respect to the electron beam trajectory, hence controlling the spatial superposition of the electron and photon beams in the interaction region. Arranging two cavities assembled one on top of the other, with different collision angle with the electron beam, allows the generation of X-ray bursts of different energies just by swiftly moving the two cavities, switching the two focal points onto the electron beam trajectory, thus activating in sequence two different ICS spectral lines
Local discrimination of orbital angular momentum in entangled states
We address the use of a calcite crystal-based local detector to the
discrimination of orbital angular momentum of quantum radiation produced by
parametric down conversion. We demonstrate that a discrimination can be
obtained exploiting the introduction of a fine and controlled spatial shift
between two replicas of the state in the crystals. We believe that this
technology could be used for future development of long-distance quantum
communication techniques, where information encoding is based on orbital
angular momentum
BriXs ultra high fluxinverse compton source based on modified push-pull energy recovery linacs
We present a conceptual design for a compact X-ray Source BriXS (Bright and compact
X-ray Source). BriXS, the first stage of the Marix project, is an Inverse Compton Source (ICS) of
X-ray based on superconducting cavities technology for the electron beam with energy recirculation
and on a laser system in Fabry-Pérot cavity at a repetition rate of 100 MHz, producing 20–180 keV
monochromatic X-Rays devoted mainly to medical applications. An energy recovery scheme based on
a modified folded push-pull CW-SC twin Energy Recovery Linac (ERL) ensemble allows us to sustain
an MW-class beam power with almost one hundred kW active power dissipation/consumption
BriXs Ultra High Flux Inverse Compton Source Based on Modified Push-Pull Energy Recovery Linacs
We present a conceptual design for a compact X-ray Source BriXS (Bright and compact X-ray Source). BriXS, the first stage of the Marix project, is an Inverse Compton Source (ICS) of X-ray based on superconducting cavities technology for the electron beam with energy recirculation and on a laser system in Fabry-Pérot cavity at a repetition rate of 100 MHz, producing 20–180 keV monochromatic X-Rays devoted mainly to medical applications. An energy recovery scheme based on a modified folded push-pull CW-SC twin Energy Recovery Linac (ERL) ensemble allows us to sustain an MW-class beam power with almost one hundred kW active power dissipation/consumption