12 × 12 MIMO Transmission over 130-km Few-Mode Fiber

Ryf, Roland; Fontaine, Nicolas K.; Mestre, M. A.; Randel, Sebastian; Palou, X.; Bolle, C.; Gnauck, A.H.; Chandrasekhar, S.; Liu, Xiang; Guan, Binbin; Essiambre, René-Jean; Winzer, Peter J.; Leon-Saval, Sergio G.; Bland‐Hawthorn, J.; Delbue, R.; Pupalaikis, Peter J.; Sureka, A.; Sun, Yi; Grüner-Nielsen, L.; Lingle, Robert

doi:10.1364/fio.2012.fw6c.4

Cited by 47 publications

(40 citation statements)

References 3 publications

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“…Figures 7(a) and 7(b) confirms that after optimization, the optical mode at the fiber output is clearly dominated by the desired target, i.e., LP 01 for Fig. 7(a) and LP 11 for Fig. 7(b).…”

Section: Resultssupporting

confidence: 59%

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Adaptive control of waveguide modes in a two-mode-fiber

Lü¹,

Shipton²,

Wang³

et al. 2014

Opt. Express

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We experimentally demonstrate an adaptive-optics-based approach that allows selective excitation of waveguide modes and their mixtures in a two-mode fiber (TMF). A phase-only spatial light modulator is used for wavefront control, using feedback signals provided by the correlation between the experimentally measured field distribution and the desired mode profiles. Experimental results show the optical field within the TMF can be shaped to be pure linearly polarized (LP) modes or their combinations. Analysis shows selective mode excitation can be achieved using only 5 × 5 independent phase blocks. With proper feedback signals, this method should enable one to precisely control the optical field within any multimode fiber or other types of waveguides in real time.

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“…Figures 7(a) and 7(b) confirms that after optimization, the optical mode at the fiber output is clearly dominated by the desired target, i.e., LP 01 for Fig. 7(a) and LP 11 for Fig. 7(b).…”

Section: Resultssupporting

confidence: 59%

“…A key component of MDM is the excitation of specific waveguide mode in a MMF. In existing literature, this task can be accomplished using multiple techniques, such as stress fiber [6], spot-based coupler or spatial beam sampler [7,8], photonic lanterns [9][10][11], phase masks [12,13] or spatial light modulators (SLM) [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Adaptive control of waveguide modes in a two-mode-fiber

Lü¹,

Shipton²,

Wang³

et al. 2014

Opt. Express

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show abstract

“…6, so its overall transfer function HMUX (ω) results from the concatenation of the transfer functions describing the constituent mode-selective couplers, given by (4)- (6 …”

Section: B Modal Multiplexermentioning

confidence: 99%

“…In coherent long-haul systems, the FMF must be optimized to yield a low differential group delay (DGD) between modes, in order to reduce the memory length requirements for MIMO processing. FMF transmission supporting in 12 modes (six spatial modes) was first demonstrated in 2012 [6]. By proper design of a graded-index (GI) profile, the maximum DGD was reduced to 69 ps/km, and a capacity of 480 Gb/s over a 130-km link was achieved.…”

Section: Introductionmentioning

confidence: 99%

Performance of Direct-Detection Mode-Group-Division Multiplexing Using Fused Fiber Couplers

Gasulla

Kahn

2015

J. Lightwave Technol.

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Abstract-We present an end-to-end performance evaluation of a mode-group-division multiplexing system that uses direct detection instead of coherent detection, avoiding complex digital signal processing. The system transmits four data channels through a step-index fiber supporting six spatial modes comprising four mode groups, considering the two-fold degeneracy of the LPlm modes for l ≠ 0. Multiplexing and demultiplexing is performed using two-and three-core fused fiber couplers, each one phase-matched to a group of degenerate modes. These devices are analyzed through a field-based model that describes, for the first time to our knowledge, crosstalk between all the fiber modes. Propagation through the few-mode fiber is modeled considering differential modal attenuation, intermodal dispersion, chromatic dispersion, and both intergroup and intragroup modal coupling. The end-to-end link is described by a concatenation of matrix operators describing the optical field transfer functions for the multiplexer, fiber and demultiplexer. Error-free transmission of four 32-Gb/s OOKmodulated data channels through a 1-km link proves the feasibility of the proposed direct-detection mode-group-division multiplexing approach.Index Terms-Optical fiber communication, few-mode fibers, mode-group-division multiplexing.

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“…Received by two coherent receivers and respective 4-port oscilloscopes, a 3 mode transmission of 28GBaud QPSK,8,16, and 32QAM over 41.7km of few-mode fiber demonstrates the performance of the TDM-SDM receiver with respect to back-to-back. In addition, by using carrier phase estimation employing one digital phase locked loop per output, the frequency offset between the transmitter laser and local oscillator is shown to perform similar to previous work which employs 3 coherent receivers and 4-port oscilloscopes which are dedicated to the reception of each the three modes.…”

mentioning

confidence: 99%

Time domain multiplexed spatial division multiplexing receiver

Uden¹,

Okonkwo²,

Chen³

et al. 2014

Opt. Express

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A novel time domain multiplexed (TDM) spatial division multiplexing (SDM) receiver which allows for the reception of >1 dual polarization mode with a single coherent receiver, and corresponding 4-port oscilloscope, is experimentally demonstrated. Received by two coherent receivers and respective 4-port oscilloscopes, a 3 mode transmission of 28GBaud QPSK,8,16, and 32QAM over 41.7km of few-mode fiber demonstrates the performance of the TDM-SDM receiver with respect to back-to-back. In addition, by using carrier phase estimation employing one digital phase locked loop per output, the frequency offset between the transmitter laser and local oscillator is shown to perform similar to previous work which employs 3 coherent receivers and 4-port oscilloscopes which are dedicated to the reception of each the three modes.

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12 × 12 MIMO Transmission over 130-km Few-Mode Fiber

Cited by 47 publications

References 3 publications

Adaptive control of waveguide modes in a two-mode-fiber

Adaptive control of waveguide modes in a two-mode-fiber

Performance of Direct-Detection Mode-Group-Division Multiplexing Using Fused Fiber Couplers

Time domain multiplexed spatial division multiplexing receiver

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