Michelson interferometry (class 2 of 3)

29 Abril 2026, 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.

---

JWST IR detectors

27 Abril 2026, 14:00 • José Manuel Rebordão

JWST detectors (by Manuel Abreu)
CCD and CMOS image sensors: comparison.
IR semiconductor sensors. Overview. Types Hybrids.
Examples of JWST specifications of detectors.
 
NEXT CLASS
GWO basic concepts

---

Gravitational Wave Observatories (GWO)

24 Abril 2026, 09:00 • José Manuel Rebordão

Introduction to Gravitational Wave (GW) Observatories: history, identification of main systems, general architecture. Links with General relativity: typical frequencies, strain.
ET - example of most relevant specifications.
 
NEXT CLASS
JWST detectors (by M. A. Abreu)

---

Dia de Ciências - Não houve aula

22 Abril 2026, 17:00 • Bachar Wehbe

Dia de Ciências - Não houve aula

---

Dia de Ciências - Não houve aula

22 Abril 2026, 15:00 • Alexandre Pereira Cabral

Dia de Ciências - Não houve aula

---