Multi-pass probing for high-sensitivity tomographic interferometry

0546964 - FZÚ 2022 RIV GB eng J - Journal Article
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
R&D Projects: GA MŠMT EF16_019/0000789; GA MŠMT EF15_003/0000449; GA MŠMT LM2015065
Grant - others: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
Research Infrastructure: ELI Beamlines III - 90141
Institutional support: RVO:68378271
Keywords : laser * phase * algorithm
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 4.997, year: 2021
Method of publishing: 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.
Permanent Link: http://hdl.handle.net/11104/0323344