Mode-division multiplexed transmission of wavelength-division multiplexing signals over a 100-km single-span orbital angular momentum fiber

Junwei Zhang; Junyi Liu; Lei Shen; Lei Zhang; Jie Luo; Jie Liu; Siyuan Yu

doi:10.1364/PRJ.394864

Journals >Photonics Research >Volume 8 >Issue 7 >Page 1236 > Article

Photonics Research
Vol. 8, Issue 7, 1236 (2020)

Mode-division multiplexed transmission of wavelength-division multiplexing signals over a 100-km single-span orbital angular momentum fiber | Spotlight on Optics

Junwei Zhang¹, Junyi Liu¹, Lei Shen², Lei Zhang², Jie Luo², Jie Liu^1、*, and Siyuan Yu^1、3、4

Author Affiliations

¹State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510006, China

²State Key Laboratory of Optical Fiber and Cable Manufacture Technology, Yangtze Optical Fiber and Cable Joint Stock Limited Company, Wuhan 430073, China

³Photonics Group, Merchant Venturers School of Engineering, University of Bristol, Bristol BS8 1UB, UK

⁴e-mail: s.yu@bristol.ac.uk

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DOI: 10.1364/PRJ.394864 Cite this Article Set citation alerts

Junwei Zhang, Junyi Liu, Lei Shen, Lei Zhang, Jie Luo, Jie Liu, Siyuan Yu. Mode-division multiplexed transmission of wavelength-division multiplexing signals over a 100-km single-span orbital angular momentum fiber[J]. Photonics Research, 2020, 8(7): 1236 Copy Citation Text

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Fig. 1. (a) Cross-sectional diagram, (b) RIP, and (c) propagation loss of the RCF used in the experiment.

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Experimental setup for OAM-MDM/WDM data transmission. The intensity profiles of MGs (i) |l|=2 and (ii) |l|=3 after 100-km RCF transmission. WDM, wavelength-division multiplexer; AWG, arbitrary waveform generator; OC, optical coupler; EDFA, erbium-doped fiber amplifier; PC, polarization controller; Col., collimator; SMF, single-mode fiber; LP, linear polarizer; SLM, spatial light modulator; MR, mirror; PBC, polarizing beam combiner; HWP, half-wave plate; BS, beam splitter; QWP, quarter-wave plate; PBS, polarizing beam splitter; VPP, vortex phase plate; PM, power meter; ICR, integrated coherent receiver; LO, local oscillator. Note that the optical switches are utilized to switch between setups for fiber characterization and data transmission.

Fig. 2. Experimental setup for OAM-MDM/WDM data transmission. The intensity profiles of MGs (i) |l|=2 and (ii) |l|=3 after 100-km RCF transmission. WDM, wavelength-division multiplexer; AWG, arbitrary waveform generator; OC, optical coupler; EDFA, erbium-doped fiber amplifier; PC, polarization controller; Col., collimator; SMF, single-mode fiber; LP, linear polarizer; SLM, spatial light modulator; MR, mirror; PBC, polarizing beam combiner; HWP, half-wave plate; BS, beam splitter; QWP, quarter-wave plate; PBS, polarizing beam splitter; VPP, vortex phase plate; PM, power meter; ICR, integrated coherent receiver; LO, local oscillator. Note that the optical switches are utilized to switch between setups for fiber characterization and data transmission.

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Fig. 3. The absolute values of complex tap weights of the 16 FIR filters in 4×4 MIMO equalizer to equalize the four modes in MGs (a) |l|=2 and (b) |l|=3 after 100-km RCF transmission.

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Fig. 4. Measured BER versus OSNR of MGs (a) |l|=2 and (b) |l|=3 at 1550.12 nm after 100-km RCF transmission; constellation diagrams of the recovered 16-GBaud QPSK signals of all simultaneously transmitted OAM mode channels of MGs (c) |l|=2 and (d) |l|=3 at an OSNR of 24 dB after 100-km RCF transmission.

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Fig. 5. (a) Measured BERs of all 80 channels after 100-km RCF transmission; (b) optical spectra of the 10 WDM channels at the transmitter side.

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RCF Types	Loss (dB/km)	Signal and MIMO DSP	Number of MDM Channels	Number of WDM Channels	Capacity (Tbit/s)	Distance (km)	Capacity-Distance Product [(Tbit/s) · km]	Refs.
Elliptical ring core	—	QPSK, MIMO free	6	1	0.384	0.9	0.3456	[17,18]
Graded index	—	OOK, MIMO free	2	1	0.02	0.1	0.002	[19]
Step index	—	OOK, MIMO free	2	1	0.02	1	0.02	[20]
Graded index	—	OOK, MIMO free	3	1	0.0375	0.36	0.0135	[21]
Graded index	0.75	16QAM/QPSK-DMT, MIMO free	3	1	0.1	1	0.1	[11]
Graded index	0.75	QPSK-DMT, MIMO free	2	1	0.04	18.4	0.736	[11]
Graded index	1	8QAM, MIMO free	2	112	8.4	18	151.2	[22]
RIP-modulated	0.31	OOK, MIMO free	2	1	0.015	50	0.75	[23]
RIP-modulated	0.21	OOK, MIMO free	2	4	0.12	100	12	[24]
Step index	0.3	16QAM, $10 \times 10$ MIMO	10	1	1.12	1	1.12	[25]
Step index	0.3	QPSK, $10 \times 10$ MIMO	10	1	0.56	24	13.44	[25]
Graded index	1	QPSK, $4 \times 4$ MIMO	8	10	5.12	10	51.2	[12]
RIP-modulated	0.31	QPSK, $4 \times 4$ MIMO	8	10	2.56	50	128	[26]
RIP-modulated	0.21	QPSK, $4 \times 4$ MIMO	8	10	2.56	100	256	This work

Table 1. Data Transmission of RCF-Based MDM Systems in Recent Works

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		$\| l \| = 0$	$\| l \| = 1$		$\| l \| = 2$		$\| l \| = 3$
$Δ n_{eff}$	( $\times 10^{- 3}$ )	0.7		1.8		2.5
Attenuation	(dB/km)	0.209	0.211		0.208		0.210
DGD	(ns/km)	0	3.2		8.5		13.1

Table 2. Characteristics of the Fabricated RCF

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	Input MG $\| l \| = 2$		Input MG $\| l \| = 3$
	Output MG $\| l \| = 2$	Output MG $\| l \| = 3$	Output MG $\| l \| = 2$	Output MG $\| l \| = 3$
Crosstalk (dB)	0	−12.495	−11.486	0