Abstract

Coherent fiber bundle (CFB)–based endoscopes enable optical keyhole access in applications such as biophotonics. In conjunction with objective lenses, CFBs allow imaging of intensity patterns. In contrast, digital optical phase conjugation enables lensless holographic endoscopes for the generation of pixelation-free arbitrary light patterns. For real-world applications, however, this requires a non-invasive in situ calibration of the complex optical transfer function of the CFB with only single-sided access. We show that after an initial calibration in a forward direction, a differential phase measurement of the back-reflected light allows for tracking and compensating of bending-induced phase distortions. Furthermore, we present a novel in situ calibration procedure based on a programmable guide star, which requires access to only one side of the fiber.

© 2018 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Design of flexible multi-mode fiber endoscope

Ruo Yu Gu, Reza Nasiri Mahalati, and Joseph M. Kahn
Opt. Express 23(21) 26905-26918 (2015)

Transmission of independent signals through a multimode fiber using digital optical phase conjugation

Jürgen W. Czarske, Daniel Haufe, Nektarios Koukourakis, and Lars Büttner
Opt. Express 24(13) 15128-15136 (2016)

Two-photon lensless micro-endoscopy with in-situ wavefront correction

Uri Weiss and Ori Katz
Opt. Express 26(22) 28808-28817 (2018)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (9)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription