TY - JOUR
T1 - SBS Gain Suppression in a Passive Single-Mode Optical Fiber by the Multi-Mode Acoustic Waveguide Design
AU - Tsvetkov, Sergey V.
AU - Khudyakov, Maxim M.
AU - Lobanov, Alexey S.
AU - Lipatov, Denis S.
AU - Bubnov, Mikhail M.
AU - Guryanov, Alexey N.
AU - Temyanko, Valery
AU - Likhachev, Mikhail E.
N1 - Funding Information:
Manuscript received August 30, 2020; accepted October 13, 2020. Date of publication October 16, 2020; date of current version January 15, 2021. This work was supported by the Russian Science Foundation under Project 18-19-00687. (Corresponding author: Sergey V. Tsvetkov.) Sergey V. Tsvetkov, Mikhail M. Bubnov, and Mikhail E. Likhachev are with the Prokhorov General Physics Institute of the Russian Academy of Sciences, Dianov Fiber Optics Research Center, Moscow 119333, Russia (e-mail: [email protected]; [email protected]; [email protected]).
Publisher Copyright:
© 1983-2012 IEEE.
PY - 2021/1/15
Y1 - 2021/1/15
N2 - A novel method of stimulated Brillouin scattering (SBS) gain suppression in passive single-mode optical fibers is proposed and experimentally verified. The effect is achieved due to special propagation conditions created for a number of the core-bounded acoustic modes effectively involved in the SBS, such that its gain becomes approximately evenly distributed over a wide spectral range, thereby proportionally reducing its maximum. To verify and investigate this method in depth, single-mode large-mode-area (LMA) fibers with correspondingly optimized acoustic index profiles are fabricated, experimentally tested, and analyzed. Uneven complex doping of the core with two additives, P2O5 and F, forms a high-contrast gradient acoustic index profile while maintaining a quasi-uniform optical refractive index profile. With a contrast of P2O5 of more than 6 mol.%, we achieved 8 dB of SBS suppression over conventional uniformly doped LMA fibers. Moreover, it is shown that more than 10 dB of SBS gain suppression can be achieved if the optimal dopant distribution is realized.
AB - A novel method of stimulated Brillouin scattering (SBS) gain suppression in passive single-mode optical fibers is proposed and experimentally verified. The effect is achieved due to special propagation conditions created for a number of the core-bounded acoustic modes effectively involved in the SBS, such that its gain becomes approximately evenly distributed over a wide spectral range, thereby proportionally reducing its maximum. To verify and investigate this method in depth, single-mode large-mode-area (LMA) fibers with correspondingly optimized acoustic index profiles are fabricated, experimentally tested, and analyzed. Uneven complex doping of the core with two additives, P2O5 and F, forms a high-contrast gradient acoustic index profile while maintaining a quasi-uniform optical refractive index profile. With a contrast of P2O5 of more than 6 mol.%, we achieved 8 dB of SBS suppression over conventional uniformly doped LMA fibers. Moreover, it is shown that more than 10 dB of SBS gain suppression can be achieved if the optimal dopant distribution is realized.
KW - Acoustic index profile
KW - Brillouin gain spectrum
KW - fiber acoustic modes
KW - SBS gain suppression
KW - single-mode optical fibers
KW - stimulated Brillouin scattering
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U2 - 10.1109/JLT.2020.3031726
DO - 10.1109/JLT.2020.3031726
M3 - Article
AN - SCOPUS:85098853690
SN - 0733-8724
VL - 39
SP - 592
EP - 599
JO - Journal of Lightwave Technology
JF - Journal of Lightwave Technology
IS - 2
M1 - 9226472
ER -