Broadband Wavelength Swept Laser With Bidirectional Photonic Resonance for High Resolution Optical Coherence Tomography

IEEE Photonics Journal

Jinyong Ha¹  Seungwan Lee¹  Long Cui¹  Asim Bashir²  Ammar Javaid² 

[1] Electrical Engineering Department, Sejong University, Seoul, South Korea;Graduate School of Optical Engineering, Sejong University, Seoul, South Korea;

关键词: Optical coherence tomography;    polygon scanner tunable filter;    semiconductor optical amplifier;    wavelength-swept laser;   

DOI  :  10.1109/JPHOT.2022.3140319

来源: DOAJ

【 摘 要 】

A light source with extended spectral bandwidth applied in optical coherence tomography (OCT) systems produces highly accurate micro-scale imaging structures owing to the attainable high-axial resolution. This study presents a wide tuning range of a wavelength-swept laser to improve the axial resolution. Linear cavity configuration was performed for bidirectional photonic resonance using two semiconductor optical amplifiers placed parallelly. A polygon scanner-based tunable filter produced a broad scanning range of 155 nm from 917 nm to 1072 nm and an axial resolution of 3.4 μm in air. Bench-top imaging of a phantom made of food wraps was performed with 22.6 μm transverse resolution to evaluate the performance of the swept laser for high-resolution OCT.

【 授权许可】

Unknown