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Fibers 2016, 4(2), 14; doi:10.3390/fib4020014

Electro-Optic Swept Source Based on AOTF for Wavenumber-Linear Interferometric Sensing and Imaging

1
Department of Cogno-Mechatronics Engineering, Pusan National University, Busan 609-735, Korea
2
Department of Advanced Circuit Interconnection, Pusan National University, Busan 609-735, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Stephen C. Bondy
Received: 7 January 2016 / Accepted: 15 April 2016 / Published: 26 April 2016
(This article belongs to the Special Issue Fiber Lasers)
View Full-Text   |   Download PDF [2796 KB, uploaded 26 April 2016]   |  

Abstract

We demonstrate a novel electro-optic swept source for wavenumber-linear interferometric sensing and imaging applications. The electro-optic swept source based on an acousto-optic tunable filter (AOTF) provides high environmental stability and arbitrary drive function sweeping because the electro-optic wavelength selection does not depend on a mechanical moving component to tune the output lasing wavelength. We show improved stability of the suggested electro-optic swept source, compared to a conventional swept source based on a fiber Fabry–Perot tunable filter (FFP-TF). Various types of wavelength sweeping are demonstrated by applying the programmed drive function to the applied radio frequency (RF) of the AOTF. We demonstrated improved image quality of optical coherence tomography (OCT) by using the wavenumber-linear drive function of a simple triangular signal, which has a high wavenumber-linearity with an R-square value of 0.99991. View Full-Text
Keywords: fiber laser; swept source; acousto-optic tunable filter (AOTF); k-linear sensing fiber laser; swept source; acousto-optic tunable filter (AOTF); k-linear sensing
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Han, G.-H.; Cho, S.-W.; Park, N.S.; Kim, C.-S. Electro-Optic Swept Source Based on AOTF for Wavenumber-Linear Interferometric Sensing and Imaging. Fibers 2016, 4, 14.

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