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Appl. Sci. 2017, 7(5), 478; doi:10.3390/app7050478

A Novel Technique for Designing High Power Semiconductor Optical Amplifier (SOA)-Based Tunable Fiber Compound-Ring Lasers Using Low Power Optical Components

1
New York City College of Technology, City University of New York, New York, NY 11201, USA
2
The City College of New York, City University of New York, New York, NY 10031, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Malte C. Kaluza
Received: 1 April 2017 / Revised: 28 April 2017 / Accepted: 3 May 2017 / Published: 5 May 2017
(This article belongs to the Section Optics and Lasers)
View Full-Text   |   Download PDF [3775 KB, uploaded 5 May 2017]   |  

Abstract

A simple, stable and inexpensive dual-output port widely tunable semiconductor optical amplifier (SOA)-based fiber compound-ring laser structure is demonstrated. This unique nested ring cavity enables high optical power to split into different branches where amplification and wavelength selection are achieved by using low-power SOAs and a tunable filter. Furthermore, two Sagnac loop mirrors, which are spliced at the two ends of the compound-ring cavity not only serve as variable reflectors but also channel the optical energy back to the same port without using any high optical power combiner. We propose and discuss how the demonstrated fiber compound-ring laser structure can be extended in order to achieve a high power fiber laser source by using low power optical components, such as N × N couplers and (N > 1) number of SOAs. A coherent beam-combining efficiency of over 98% for two parallel nested fiber ring resonators is achieved over the C-band tuning range of 30 nm. Optical signal-to-noise ratio (OSNR) of +45 dB, and optical power fluctuation of less than ±0.02 dB are measured over three hours at room temperature. View Full-Text
Keywords: semiconductor optical amplifier; beam combining; power scalability; Sagnac interferometer; laser tuning; ring laser semiconductor optical amplifier; beam combining; power scalability; Sagnac interferometer; laser tuning; ring laser
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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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Ummy, M.A.; Bikorimana, S.; Dorsinville, R. A Novel Technique for Designing High Power Semiconductor Optical Amplifier (SOA)-Based Tunable Fiber Compound-Ring Lasers Using Low Power Optical Components. Appl. Sci. 2017, 7, 478.

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