Title

Bessel beam spectral-domain high-resolution optical coherence tomography with micro-optic axicon providing extended focusing range

Authors

Authors

K. S. Lee;L. P. Rolland

Comments

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Abbreviated Journal Title

Opt. Lett.

Keywords

LENS; DEPTH; Optics

Abstract

Endoscopic imaging in tubular structures, such as the tracheobronchial tree, could benefit from imaging optics with an extended depth of focus (DOF) to accommodate the varying sizes of tubular structures across patients and along the tree within the same patient. Yet the extended DOF needs to be accomplished without sacrificing resolution while maintaining sufficient sensitivity and speed of imaging. In this Letter, we report on the measured resolution and sensitivity achieved with a custom-made micro-optic axicon lens designed to theoretically achieve an 8 rum DOE A measured invariant resolution of similar to 8 mu m is demonstrated across a 4 mm measured DOF using the micro-optic axicon while achieving an invariant sensitivity of similar to 80 dB with a 25 mW input power. Double-pass Bessel beam spectral-domain optical coherence tomography with an axicon micro-optic lens (i.e., < 1 mm in diameter) is, for the first time to our knowledge, demonstrated in a biological sample demonstrating invariant resolution and signal-to-noise ratio across a 4 mm measured DOF, which is compared to Gaussian beam imaging. (c) 2008 Optical Society of America.

Journal Title

Optics Letters

Volume

33

Issue/Number

15

Publication Date

1-1-2008

Document Type

Article

Language

English

First Page

1696

Last Page

1698

WOS Identifier

WOS:000258650200022

ISSN

0146-9592

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