Acousto-Optic Double Side-Band Amplitude Modulation of a Fiber Bragg Grating in a Four-Holes Suspended-Core Fiber

Ricardo Ezequiel Da Silva; Martin Becker; Manfred Rothhardt; Hartmut Bartelt; Alexandre A.P. Pohl

doi:10.1109/JLT.2018.2856079

Acousto-Optic Double Side-Band Amplitude Modulation of a Fiber Bragg Grating in a Four-Holes Suspended-Core Fiber

Ricardo Ezequiel Da Silva^*, Martin Becker, Manfred Rothhardt, Hartmut Bartelt, Alexandre A.P. Pohl

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

A dynamic multiwavelength reflection filter is acoustically induced by the reflectivity modulation of a fiber Bragg grating in a suspended-core fiber. The fiber composed by four air holes is combined with a specially designed acousto-optic modulator to increase the modulation efficiency and to reduce significantly the device size. The effect of the two strongest modulator modes on the grating is evaluated at 374 and 474 kHz. The high-frequency acoustic waves are amplitude modulated by a low-frequency signal from 100 to 500 Hz, generating resonant wavelengths peaks in the grating spectrum. The modulated grating reflectivity is experimentally characterized in the spectral domain. The modulation depth, bandwidth, and number of the induced resonances are tuned by the voltage and frequency of an electrical signal. Up to 15 wavelength peaks with a spectral bandwidth of ∼5 pm and a modulation depth up to 74% are generated, indicating new possibilities for compact and fast all-fiber acousto-optic devices.

Original language	English
Article number	8410671
Pages (from-to)	4146-4152
Number of pages	7
Journal	Journal of Lightwave Technology
Volume	36
Issue number	18
Early online date	13 Jul 2018
DOIs	https://doi.org/10.1109/JLT.2018.2856079
Publication status	Published - 15 Sept 2018

Funding

Manuscript received March 22, 2018; revised June 19, 2018; accepted July 1, 2018. Date of publication July 13, 2018; date of current version August 9, 2018. This work was supported in part by the Cordenac¸ão de Aperfeic¸oamento de Pessoal de Nível Superior, in part by the Fundac¸ão Araucária de Apoio ao Desenvolvimento Científico e Tecnológico do Estado do Paraná, Brazil, and in part by the Thuringian Ministry of Education, Science and Culture through the EFRE Program, Germany. (Corresponding author: Ricardo Ezequiel da Silva.) R. E. da Silva is with the Leibniz Institute of Photonic Technology, 07745 Jena, Germany, and also with the Federal University of Technology–Paraná, Curitiba 80230-901, Brazil (e-mail:,[email protected]).

Keywords

Acousto-optic devices
fiber Bragg gratings
microstructured fibers

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10.1109/JLT.2018.2856079

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abstract = "A dynamic multiwavelength reflection filter is acoustically induced by the reflectivity modulation of a fiber Bragg grating in a suspended-core fiber. The fiber composed by four air holes is combined with a specially designed acousto-optic modulator to increase the modulation efficiency and to reduce significantly the device size. The effect of the two strongest modulator modes on the grating is evaluated at 374 and 474 kHz. The high-frequency acoustic waves are amplitude modulated by a low-frequency signal from 100 to 500 Hz, generating resonant wavelengths peaks in the grating spectrum. The modulated grating reflectivity is experimentally characterized in the spectral domain. The modulation depth, bandwidth, and number of the induced resonances are tuned by the voltage and frequency of an electrical signal. Up to 15 wavelength peaks with a spectral bandwidth of ∼5 pm and a modulation depth up to 74% are generated, indicating new possibilities for compact and fast all-fiber acousto-optic devices.",

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AU - Bartelt, Hartmut

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Acousto-Optic Double Side-Band Amplitude Modulation of a Fiber Bragg Grating in a Four-Holes Suspended-Core Fiber

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