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Proceedings Paper

Continuum generation in optical fibers for high-resolution holographic coherence domain imaging application
Author(s): Linghui Li; Vitaly Gruzdev; Ping Yu; J. K. Chen
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Paper Abstract

High pulse energy continuum generation in conventional multimode optical fibers has been studied for potential applications to a holographic optical coherence imaging system. As a new imaging modality for the biological tissue imaging, high-resolution holographic optical coherence imaging requires a broadband light source with a high brightness, a relatively low spatial coherence and a high stability. A broadband femtosecond laser can not be used as the light source of holographic imaging system since the laser creates a lot of speckle patterns. By coupling high peak power femtosecond laser pulses into a multimode optical fiber, nonlinear optical effects cause a continuum generation that can be served as a super-bright and broadband light source. In our experiment, an amplified femtosecond laser was coupled into the fiber through a microscopic objective. We measured the FWHM of the continuum generation as a function of incident pulse energy from 80 nJ to 800 μJ. The maximum FWHM is about 8 times higher than that of the input pulses. The stability was analyzed at different pump energies, integration times and fiber lengths. The spectral broadening and peak position show that more than two processes compete in the fiber.

Paper Details

Date Published: 23 February 2009
PDF: 9 pages
Proc. SPIE 7197, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VIII, 71971E (23 February 2009); doi: 10.1117/12.809865
Show Author Affiliations
Linghui Li, Univ. of Missouri, Columbia (United States)
Vitaly Gruzdev, Univ. of Missouri, Columbia (United States)
Ping Yu, Univ. of Missouri, Columbia (United States)
J. K. Chen, Univ. of Missouri, Columbia (United States)

Published in SPIE Proceedings Vol. 7197:
Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VIII
Peter E. Powers, Editor(s)

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