Abstract

This work presents an optical fiber negative/reflective axicon probe that generates an energy-efficient quasi-Bessel beam (QBB) having a central spot (CS) possessing ${\sim}{{20}}\%$ of the QBB power. With silver coating around the axicon, the CS power has been increased by ${\sim}{{45}}\%$. The QBB possesses a large depth of field, ${\sim}{{400}}\;{{\unicode{x00B5}{\rm m}}}$, with a micron order spot size as obtained experimentally. The probe has further been explored for common-path optical coherence tomography. The probe length has been optimized to minimize the path length difference between the reference and sample signal. With a divergence angle of just 0.013°, the beam provides a lateral resolution of ${\sim}{2.5}$ to ${\sim}{{16}}\;{\rm{\unicode{x00B5}{\rm m}}}$ for an axial distance of 0.1 to 1.0 mm. The imaging results are presented for standard samples such as onion and Scotch tape.

© 2023 Optica Publishing Group

Miniature all-fiber axicon probe with extended Bessel focus for optical coherence tomography

Wei Wang, Guangying Wang, Jun Ma, Linghao Cheng, and Bai-Ou Guan
Opt. Express 27(2) 358-366 (2019)

Modeling, optimization, and validation of an extended-depth-of-field optical coherence tomography probe based on a mirror tunnel

Chukwuemeka Okoro, Charles R. Cunningham, Aaron R. Baillargeon, Andreas Wartak, and Guillermo J. Tearney
Appl. Opt. 60(8) 2393-2399 (2021)

Generation of extremely high-angle Bessel beams

Valeria V. Belloni, Luc Froehly, Cyril Billet, Luca Furfaro, and Francois Courvoisier
Appl. Opt. 62(7) 1765-1768 (2023)

Extended depth of focus for coherence-based cellular imaging

Biwei Yin, Chulho Hyun, Joseph A. Gardecki, and Guillermo J. Tearney
Optica 4(8) 959-965 (2017)

Extending the depth of focus of fiber-optic optical coherence tomography using a chromatic dual-focus design

Jinhan Li, Yuemei Luo, Xianghong Wang, Nanshuo Wang, En Bo, Si Chen, Shufen Chen, Shi Chen, Meng-Tsan Tsai, and Linbo Liu
Appl. Opt. 57(21) 6040-6046 (2018)