Applications of Spectral Interferometry in sub-THz, Infrared and Optical Frequency Ranges

Author(s)

Lukin, Konstantin ; Tatyanko, Dmytro ; Lukin, Sergii ; IEEE

• Document type: Journal article
• Source: 2023 INTERNATIONAL CONFERENCE ON OPTICAL MEMS AND NANOPHOTONICS, OMN AND SBFOTON INTERNATIONAL OPTICS AND PHOTONICS CONFERENCE, SBFOTON IOPC; v. N/A, p. 2-pg., 2023-01-01.

Abstract

The paper presents some results of the noise spectral interferometry (SI) for precise distance measurements in sub-THz Infra-Red and optical bands using low-coherence optical sources beyond their coherence zone. It is shown that when the path difference in Michelson interferometer exceeds the coherence length of the light-emitting diode radiation, the pattern of interference in spectral domain enables to perform absolute measurements of micro- and nano-distances due to its dependence on both time delay and relative phase of the signals. (AU)

• FAPESP's process: 22/11397-8 - Drone-borne SAR with noise pulse and stepped frequency and delay for surface and tomographic mapping of soil and human body
• Grantee: Hugo Enrique Hernández Figueroa
• Support Opportunities: Research Grants - Visiting Researcher Grant - International