Sumários
Quantum optics – E-field quantization
26 Maio 2025, 14:00 • José Manuel Rebordão
Theoretical
regimes, semiclassical and full quantum descriptions.
Classical
E-field representations. Quadratures. Phasor description. Modes of light.
Energy
of a light beam, Hamiltonian.
Classical
canonical-conjugated variables.
Procedures
for canonical quantization (Dirac).
1D
quantum harmonic oscillator, number, creation and annihilation operators.
Quantization
of the E-field, with a similar Hamiltonian and different quadrature operators.
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States
of light
GWO – additional subsystems
23 Maio 2025, 09:00 • José Manuel Rebordão
Laser
system and components.
Mode
cleaning, input and output. Examples.
Radiation
pressure.
Additional
elements of the control system to control the position of the end mirrors.
Squeezing
source: basic elements, analysis of different layout sharing the same architecture.
Injection of the squeezed beam into the interferometer.
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Quantum
optics: basics
Michelson Interferometry (class 2 of 3)
21 Maio 2025, 17:00 • Bachar Wehbe
Setup
of a Michelson Interferometer (MI), using amplitude splitting, and analysis of
the generated interferograms in several configurations.
Usage of cube beam splitters and polarisation optics to control laser beam
polarization.
Assessment
of how the MI can be used to measure relative displacements of one of the
mirrors, using a piezo electric stage actuator to move one of the mirrors.
Analysis
of several polarization optical elements (polarizers, polarizing beam splitters
and wave plates) using a polarimeter (an instruments that measure the
polarisation state of light).
Acquisition of interferograms using a CMOS 2D camera for post processing.
Michelson interferometry (class 2 of 3)
21 Maio 2025, 15:00 • Alexandre Pereira Cabral
Setup
of a Michelson Interferometer (MI), using amplitude splitting, and analysis of
the generated interferograms in several configurations.
Usage of cube beam splitters and polarisation optics to control laser beam
polarization.
Assessment of how the MI can be used to measure relative displacements of one of the mirrors, using a piezo electric stage actuator to move one of the mirrors.
Analysis of several polarization optical elements (polarizers, polarizing beam splitters and wave plates) using a polarimeter (an instruments that measure the polarisation state of light).
Assembly of a homodyne quadrature detection configuration to achieve higher resolution compared to the previous simple homodyne detection.Acquisition of interferograms using a CMOS 2D camera for post processing.
Recycling cavities
19 Maio 2025, 14:00 • José Manuel Rebordão
Double FP cavities. Analysis. Reflectivity and transmissivity. Examples.
Power recycling cavity. Analysis.
Signal recycling cavity. Analysis.
Frequency response. Tuning the observatory with the SRC
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GWO
observatories additional subsystems