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Towards focusing broad band light through a multimode fiber endoscope
Author(s): Johanna Trägårdh; Tomáš Pikálek; Stephen Simpson; Petr Jákl; Martin Šiler; Tomáš Tyc; Tomáš Čižmár
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Paper Abstract

When using multimode fibers as high-resolution endoscopes, advanced adaptive optics is needed to overcome the modal dispersion which scrambles the image. Additionally, for non-linear imaging methods, all the wavelengths of a femtosecond laser pulse must be simultaneously focused at the sample plane, with appropriate dispersion compensation, that might vary across the sample area. We investigate the bandwidth of the focused spot for a graded index fiber used as a point scanning imaging device. We demonstrate that with proper compensation for the dispersion of the spatial light modulator this can be <45 nm. We also measure the spectral phase at the sample plane, and demonstrate that this does not vary substantially with spot position.

Paper Details

Date Published: 20 February 2019
PDF: 8 pages
Proc. SPIE 10886, Adaptive Optics and Wavefront Control for Biological Systems V, 108860J (20 February 2019); doi: 10.1117/12.2510449
Show Author Affiliations
Johanna Trägårdh, Institute of Scientific Instruments of the CAS, v.v.i. (Czech Republic)
Tomáš Pikálek, Institute of Scientific Instruments of the CAS, v.v.i. (Czech Republic)
Stephen Simpson, Institute of Scientific Instruments of the CAS, v.v.i. (Czech Republic)
Petr Jákl, Institute of Scientific Instruments of the CAS, v.v.i. (Czech Republic)
Martin Šiler, Institute of Scientific Instruments of the CAS, v.v.i. (Czech Republic)
Tomáš Tyc, Institute of Scientific Instruments of the CAS, v.v.i. (Czech Republic)
Masaryk Univ. (Czech Republic)
Tomáš Čižmár, Institute of Scientific Instruments of the CAS, v.v.i. (Czech Republic)
Leibniz Institute of Photonic Technology (Germany)


Published in SPIE Proceedings Vol. 10886:
Adaptive Optics and Wavefront Control for Biological Systems V
Thomas G. Bifano; Sylvain Gigan; Na Ji, Editor(s)

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