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Title: Multimode-pumped Raman amplification of a higher order mode in a large mode area fiber
Authors: Zhu, Sheng
Pidishety, Shankar
Feng, Yutong
Hong, Soonki
Demas, Jeff
Sidharthan, Raghuraman
Yoo, Seongwoo
Ramachandran, Siddharth
Srinivasan, Balaji
Nilsson, Johan
Keywords: Fiber Optics Amplifiers And Oscillators
Nonlinear Optics
DRNTU::Engineering::Electrical and electronic engineering
Issue Date: 2018
Source: Zhu, S., Pidishety, S., Feng, Y., Hong, S., Demas, J., Sidharthan, R., . . . Nilsson, J. (2018). Multimode-pumped Raman amplification of a higher order mode in a large mode area fiber. Optics Express, 26(18), 23295-. doi:10.1364/OE.26.023295
Series/Report no.: Optics Express
Abstract: We report the first demonstration of Raman amplification in a fiber of a single Bessel-like higher order mode using a multimode pump source. We amplify the LP08-mode with a 559-µm2 effective mode area at a signal wavelength of 1115 nm in a pure-silica-core step-index fiber. A maximum of 18 dB average power gain is achieved in a 9-m long gain fiber, with output pulse energy of 115 µJ. The Raman pump source comprises a pulsed 1060 nm ytterbium-doped fiber amplifier with V-value ~30, which is matched to the Raman gain fiber. The pump depletion as averaged over the signal pulses reaches 36.7%. The conversion of power from the multimode pump into the signal mode demonstrates the potential for efficient brightness enhancement with low amplification-induced signal mode purity degradation.
DOI: 10.1364/OE.26.023295
Schools: School of Electrical and Electronic Engineering 
Rights: © 2018 Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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