Wavelength detection method using vortices

B. Saucedo; A. Dávila; J. A. Rayas

doi:10.1117/12.2568686

20 August 2020 Wavelength detection method using vortices

B. Saucedo, A. Dávila, J. A. Rayas

Proceedings Volume 11488, Optical System Alignment, Tolerancing, and Verification XIII; 114880Q (2020) https://doi.org/10.1117/12.2568686
Event: SPIE Optical Engineering + Applications, 2020, Online Only

Conference Poster

Abstract

An optical system is proposed for wavelength measurement and detection using phase vortices produced by an integrating glass disc. This optical system is based on a modified digital holographic configuration used previously for measurement in Particle Image Velocimetry (PIV) but adapted here for the detection of phase vortices generated by an integrating glass disc. Phase vortices are detected from speckle patterns that are produced using a tunable light with a wavelength of 632 ± 2 nm emitted by a Littrow monolithic tunable external cavity laser, and after multiple reflections in the integrating disc combined with a reference beam and a speckle interferogram is obtained that recorded by a CCD camera. The Fourier transform method is used for speckle phase generated in the proposed optical configuration and analyzed with a vortex detection method that produces a singularities pattern for each wavelength.

Citation Download Citation

B. Saucedo, A. Dávila, and J. A. Rayas "Wavelength detection method using vortices", Proc. SPIE 11488, Optical System Alignment, Tolerancing, and Verification XIII, 114880Q (20 August 2020); https://doi.org/10.1117/12.2568686

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