Design of a Photonic Integrated Circuit for Swept-Source OCT for Simultaneous Operation in Two Distinct Wavelength Ranges

Ivan V. Stepanov; Vladimir S. Lyubopytov; Anton A. Ivanov; Elizaveta P. Grakhova

doi:10.18287/JBPE25.11.010301

Design of a Photonic Integrated Circuit for Swept-Source OCT for Simultaneous Operation in Two Distinct Wavelength Ranges

Ivan V. Stepanov (Login required)
Ufa University of Science and Technology, Russian Federation

Vladimir S. Lyubopytov
Ufa University of Science and Technology, Russian Federation

Anton A. Ivanov
Ufa University of Science and Technology, Russian Federation

Elizaveta P. Grakhova
Ufa University of Science and Technology, Russian Federation

Paper #9190 received 20 Nov 2024; revised manuscript received 18 Dec 2024; accepted for publication 19 Dec 2024; published online 31 Jan 2025.

DOI: 10.18287/JBPE25.11.010301

Abstract

The paper presents a photonic integrated circuit (PIC) concept for the swept-source optical coherence tomography (SS-OCT) systems operating within two distinct wavelength ranges: 820−880 nm and 1260−1360 nm. The PIC features two interferometric schemes connected through a joint splitter that delivers a single output for tissue scanning. The proposed PIC concept is developed for the silicon nitride platform, which offers low losses compared to another photonic integrated platform. The numerical simulations were conducted using the Ansys Lumerical software to verify the PIC concept. The simulation results indicate that the focal length of the proposed SS-OCT system is approximately 2.9 mm for both wavelength ranges, and there is no interference between the optical signals from the adjacent interferometric systems.

Keywords

optical coherence tomography; photonic integrated circuits; swept-source OCT; dual-band OCT

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