期刊
JOURNAL OF LIGHTWAVE TECHNOLOGY
卷 39, 期 15, 页码 4932-4938出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2021.3078893
关键词
Optical fiber polarization; Optical fibers; Optical fiber communication; Optical receivers; Optical polarization; Optical crosstalk; Optical fiber networks; Kramers-Kronig (KK) receiver; mode division multiplexing (MDM); vector mode (VM); wavelength division multiplexing (WDM)
资金
- National Key R&D Program of China [2018YFB1801701]
- National Natural Science Foundation of China (NSFC) [U1701661, 62022029]
- Program for Guangdong Introducing Innovative and Enterpreneurial Teams [2019ZT08X340]
- Research and Development Plan in Key Areas of Guangdong Province [2018B010114002]
- State Key Laboratory of Advanced Optical Communication Systems and Networks, China [2019GZKF1]
Vector modes, as the eigenmodes of optical fiber, have potential for high-capacity spatial division multiplexing and mode division multiplexing. Experimental demonstrations show various high-capacity signal transmission schemes, highlighting the enormous potential of VMDM technology in optical interconnects.
Vector modes (VMs) with spatially nonhomogeneous polarization patterns, combining polarization and spatial-mode degrees of freedom together, are regarded as the eigenmodes of optical fiber. Such eigenmodes have potential to be used to implement the high capacity spatial division multiplexing (SDM)/mode division multiplexing (MDM) based optical fiber communication systems. Here, we respectively demonstrate 2 VMs of the same order (l = +2, EH11o and EH11e modes) and 2 VMs of different orders (l = 0, HE11o mode and l = +2, EH11e mode) multiplexing transmissions over 5-km few-mode fiber (FMF). The mode crosstalk after FMF transmission has been minimized to prepare high capacity signal transmission without multiple-input-multiple-output (MIMO) digital signal processing (DSP). To increase the transmission capacity and decrease the system cost, the Kramers-Kronig (KK) receiver has been employed and the single-wavelength two sets of eigenmodes multiplexed 360 Gbit/s and 400 Gbit/s signal transmissions over 5-km FMF link are realized, respectively. Then, to further burst the transmission capacity, 2 vector-mode-division-multiplexing channels (HE11o and EH11e modes) in combination of 5 wavelength-division-multiplexing (WDM) channels with a total of 10 parallel channels have been demonstrated. A total data rate of 1.12 Tbit/s with 28 GBaud 16-state quadrature amplitude modulation (QAM) signal has been realized over the 5-km FMF. In all data-carrying experimental demonstrations, the bit-error rate (BER) performance of each VM channel is below the 7% hard decision forward error correction threshold (FEC) at BER of 3.8 x 10(-3). The experimental results highlight that the VMDM-based optical transmission technology could find enormous potential in huge-capacity short-reach optical interconnects.
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