Variable optical attenuator and dynamic mode group equalizer for few mode fibers

Miri Blau; Israel Weiss; Jonathan Gerufi; David Sinefeld; Moran Bin-Nun; Robert Lingle; Lars Grüner-Nielsen; Dan M. Marom

doi:10.1364/OE.22.030520

Variable optical attenuator and dynamic mode group equalizer for few mode fibers

Miri Blau
, Israel Weiss
, Jonathan Gerufi
, David Sinefeld
, Moran Bin-Nun
, Robert Lingle
, Lars Grüner-Nielsen
, Dan M. Marom

Applied Physics Department
Hebrew University of Jerusalem
Furukawa Electric Co., Ltd.
OFS Fitel Denmark ApS

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

16 Scopus citations

Abstract

Variable optical attenuation (VOA) for three-mode fiber is experimentally presented, utilizing an amplitude spatial light modulator (SLM), achieving up to -28dB uniform attenuation for all modes. Using the ability to spatially vary the attenuation distribution with the SLM, we also achieve up to 10dB differential attenuation between the fiber's two supported mode group (LP₀₁ and LP₁₁). The spatially selective attenuation serves as the basis of a dynamic mode-group equalizer (DME), potentially gain-balancing mode dependent optical amplification. We extend the experimental three mode DME functionality with a performance analysis of a fiber supporting 6 spatial modes in four mode groups. The spatial modes' distribution and overlap limit the available dynamic range and performance of the DME in the higher mode count case.

Original language	English
Pages (from-to)	30520-30527
Number of pages	8
Journal	Optics Express
Volume	22
Issue number	25
DOIs	https://doi.org/10.1364/OE.22.030520
State	Published - 15 Dec 2014
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2014 Optical Society of America.

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abstract = "Variable optical attenuation (VOA) for three-mode fiber is experimentally presented, utilizing an amplitude spatial light modulator (SLM), achieving up to -28dB uniform attenuation for all modes. Using the ability to spatially vary the attenuation distribution with the SLM, we also achieve up to 10dB differential attenuation between the fiber's two supported mode group (LP01 and LP11). The spatially selective attenuation serves as the basis of a dynamic mode-group equalizer (DME), potentially gain-balancing mode dependent optical amplification. We extend the experimental three mode DME functionality with a performance analysis of a fiber supporting 6 spatial modes in four mode groups. The spatial modes' distribution and overlap limit the available dynamic range and performance of the DME in the higher mode count case.",

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AU - Blau, Miri

AU - Weiss, Israel

AU - Gerufi, Jonathan

AU - Sinefeld, David

AU - Bin-Nun, Moran

AU - Lingle, Robert

AU - Grüner-Nielsen, Lars

AU - Marom, Dan M.

PY - 2014/12/15

Y1 - 2014/12/15

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AB - Variable optical attenuation (VOA) for three-mode fiber is experimentally presented, utilizing an amplitude spatial light modulator (SLM), achieving up to -28dB uniform attenuation for all modes. Using the ability to spatially vary the attenuation distribution with the SLM, we also achieve up to 10dB differential attenuation between the fiber's two supported mode group (LP01 and LP11). The spatially selective attenuation serves as the basis of a dynamic mode-group equalizer (DME), potentially gain-balancing mode dependent optical amplification. We extend the experimental three mode DME functionality with a performance analysis of a fiber supporting 6 spatial modes in four mode groups. The spatial modes' distribution and overlap limit the available dynamic range and performance of the DME in the higher mode count case.

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Variable optical attenuator and dynamic mode group equalizer for few mode fibers

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