Multi-pass probing for high-sensitivity tomographic interferometry

0546964 - FZÚ 2022 RIV GB eng J - Článek v odborném periodiku
Karatodorov, Stefan - Lera, Roberto - Raclavský, Marek - Lorenz, Sebastian - Chaulagain, Uddhab P. - Nejdl, Jaroslav
Multi-pass probing for high-sensitivity tomographic interferometry.
Scientific Reports. Roč. 11, č. 1 (2021), č. článku 15072. ISSN 2045-2322. E-ISSN 2045-2322
Grant CEP: GA MŠMT EF16_019/0000789; GA MŠMT EF15_003/0000449; GA MŠMT LM2015065
Grant ostatní: OP VVV - ADONIS(XE) CZ.02.1.01/0.0/0.0/16_019/0000789; OP VVV - HiFi(XE) CZ.02.1.01/0.0/0.0/15_003/0000449
Výzkumná infrastruktura: ELI Beamlines III - 90141
Institucionální podpora: RVO:68378271
Klíčová slova: laser * phase * algorithm
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 4.997, rok: 2021
Způsob publikování: Open access

Optical probing is an indispensable tool in research and development. In fact, it has always been the most natural way for humankind to explore nature. However, objects consisting of transparent materials with a refractive index close to unity, such as low-density gas jets, are a typical example of samples that often reach the sensitivity limits of optical probing techniques. We introduce an advanced optical probing method employing multiple passes of the probe through the object to increase phase sensitivity, and relay-imaging of the object between individual passes to preserve spatial resolution. An interferometer with four-passes was set up and the concept was validated by tomographic characterization of low-density supersonic gas jets.
Trvalý link: http://hdl.handle.net/11104/0323344