Sumários

LIGO Analysis of optical subsystems

17 Março 2023, 12:00 • José Manuel Rebordão

Architecture: how the carrier, RF sidebands and science signal circulate throughout the LIGO system.

Analysis of optical elements using the scattering matrix: beam-splitter, Michelson interferometer (simple configuration), SYM and ASY ports, common and differential signals, gray and dark fringe conditions.

 

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Analysis of a FP and two FP’s in sequence. Power Recycling Cavity (PRC)

Spectroscopy (2 in 3)

15 Março 2023, 11:00 • Alexandre Pereira Cabral

Analysis and operation of spectrometers and monochromators to have an introductory approach to spectral decomposition of polychromatic light.

Study of the dispersion of light, the properties of diffracting elements and how they are used in monochromators and spectrographs, and the concepts of spectral resolution and resolving power.

Characterization of non-monochromatic light.

LIGO initial mode cleaner

13 Março 2023, 10:00 • José Manuel Rebordão

Modification of gaussian beam parameters by lenses / mirrors (Saleh)

The concept of mode-matching.

Optical architecture of LIGO: PSL (pre-stabilised laser system and IO (Input Optics).

Presentation of Nuno Covas: LIGO Input Mode Cleaner: main functions of the IMC, design of the resonant cavity, most relevant parameters. How the IMC can be used to filter out high-order Hermite Laguerre modes.

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LIGO Power Recycling Cavity (PRC)

Pound-Drever-Hall (PDH) control technique

FALTA

10 Março 2023, 12:00 • José Manuel Rebordão

Falecimento de familiar

Spectroscopy (1 in 3)

8 Março 2023, 11:00 • Alexandre Pereira Cabral

Analysis and operation of spectrometers and monochromators to have an introductory approach to spectral decomposition of polychromatic light.

Study of the dispersion of light, the properties of diffracting elements and how they are used in monochromators and spectrographs, and the concepts of spectral resolution and resolving power.

Characterization of non-monochromatic light.