A5087957907- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Optical Coatings and Gratings
- Astronomical Observations and Instrumentation
- Molecular Junctions and Nanostructures
- Astronomy and Astrophysical Research
- Analytical Chemistry and Sensors
Polytechnic University of Turin
2024
We show that each polarization state on the Poincaré sphere (PS) can be accessed on-demand (Poincaré tailoring) by a semiconductor-based vertical-cavity surface-emitting laser (VCSEL) with two tilted sub-wavelength gratings (SWGs). develop vectorial Barkhausen criterion answers question: what conditions must cavity fulfill to support given desired state? Addressing this inquiry leads completely different strategy based entangled interplay between SWGs, resulting in an overall chiral cavity,...
In May 1997 a consistent part of the services and structures committed to industry had already been released commissioning group. The telescope itself was, with exception Nasmyth derotators, motors all optics groups, basically ready in its mechanical parts accept integration control equipment. Also verification cabling (interlocks, data-nets, power controls) mounted was started same period. Starting from June 1998 (telescope first-light date) went gradually use, several nights per week,...
The present paper describes the construction, installation and operation of Optical Imager Galileo (OIG), a scientific instrument dedicated to 'imaging' in visible. OIG was first installed on focal plane Telescopio Nazionale (TNG) it has been extensively used for functional verification several parts telescope (as an example optical quality, rejection spurious light, active optics tracking), same way also TNG informatics system (instrument commanding, telemetry data archiving) have verified...