Tao Hu

Peking University

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Demonstration of bidirectional PON based on mode division multiplexing

2022 IEEE Photonics Conference (IPC) (2016)

Tao Hu Juhao Li Fang Ren Ruizhi Tang Jinyi Yu

Recently, mode division multiplexing (MDM) has been introduced into optical transmission systems and networks for capacity enhancement. In this letter, we propose a bidirectional passive optical network (PON) architecture based on MDM. The bidirectional optical distribution network (ODN) of the MDM-PON consists of few-mode fiber, passive mode multiplexer/demultiplexer and few-mode circulators (FMCs), all of which are characterized by low modal-crosstalk. Signals in different modes are able to be transmitted and received independently for both downstream and upstream transmission. We experimentally demonstrate the bidirectional MDM-PON transmission over 10-km 2-mode optical fiber. 10-Gb/s on-off-keying (OOK) signals can be independently transmitted and directly detected without coherent receiver and multi-input-multiple-output (MIMO) processing. Moreover, nonlinear transmission impairments are experimentally investigated.

Time-division multiplexing

Mode (computer interface)

10.1109/ipcon.2016.7831232

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Citations (6)

Network music terminal system design and implementation based on IPTV set-top box

Zhen Guo Ying Li Weihua Xie Tao Hu

The existing music projects terminal are mostly websites that computer can access, the mobile client and rare television set-top box terminals. Under the new forms of triple play, network music system of integrated information system supports three nets four terminal and with key technology such as network music creation, transmission and display and so on. In computer, mobile phone, radio and television four terminal, this paper mainly introduces the network music terminal system based on IPTV set-top box in the design thought, system architecture and main technology and so on, and present the final test data.

IPTV

10.1109/icis.2016.7550904

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Symmetric 100-Gb/s DSP-Enhanced TWDM-PON

Asia Communications and Photonics Conference 2021 (2014)

Bangjiang Lin Juhao Li Tao Hu Duo Li Dawei Ge

We propose a 100-Gb/s DSP-enhanced TWDM-PON architecture. The RSOA are used to enhance the sensitivity of downstream OFDM signals, while SCFDE is used for upstream transmission to reduce the complexity and cost of access network.

Time-division multiplexing

10.1364/acpc.2014.ath3a.106

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Citations (0)

Wavelength-Insensitive Weakly Coupled FMFs and Components for the MDM-GPON

IEEE Photonics Technology Letters (2018)

Tao Hu Juhao Li Yichi Zhang Zhengbin Li Yongqi He

Mode division multiplexing (MDM) has been widely investigated to enhance the capacities of passive optical networks (PONs), and weakly coupled transmission schemes are highly preferred to reduce the cost and complexity. However, wavelength insensitivities are scarcely studied for such applications. In this letter, an evolution scheme of the cascaded mode division multiplexing PON (MDM-PON) and conventional Gigabit PON (GPON), which supports bidirectional 1310/1490-nm transmission, is proposed. This scheme is enabled by wavelength-insensitive weakly coupled (WIWC) few-mode fiber (FMF) and optical components. Then, the realization of both WIWC few-mode wavelength division multiplexers (FM-WMUXs) and mode-selective couplers (MSCs) is analyzed. Based on the analysis, WIWC FM-WMUXs and MSCs that support two linear polarization modes and 1310/1490-nm transmission with low modal crosstalk are designed and fabricated. Finally, the bidirectional MDM-GPON transmission scheme with 2.5 Gb/s on-off-keying modulation and simple direct detection over 10-km FMF and 10-km single-mode fiber are experimentally demonstrated. The proposed MDM-GPON evolution scheme can achieve maximum compatibility by maintaining both the optical distribution network and the optical network units.

Polarization-division multiplexing

Gigabit

10.1109/lpt.2018.2841971

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Citations (13)

Experimental Demonstration of Time- and Mode-Division Multiplexed Passive Optical Network

Asia Communications and Photonics Conference 2021 (2015)

Ruizhi Tang Juhao Li Fang Ren Tao Hu Zhongying Wu

We propose time- and mode-division multiplexed passive optical network (TMDM-PON in which ONUs operate with both different time slots and switched modes. We experimentally demonstrate 10 km 2-mode TMDM-PON transmission without multi-input-multi-output (MIMO) processing.

Time-division multiplexing

Mode (computer interface)

Optical Transport Network

Optical cross-connect

10.1364/acpc.2015.as3h.2

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Citations (0)

Recent progress in mode-division multiplexed passive optical networks with low modal crosstalk

Optical Fiber Technology (2016)

Juhao Li Fang Ren Tao Hu Zhengbin Li Yongqi He

Time-division multiplexing

Optical line termination

Polarization-division multiplexing

Crosstalk

Optical add-drop multiplexer

10.1016/j.yofte.2016.08.001

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Citations (24)

Demonstration of Bidirectional PON Based on Mode Division Multiplexing

IEEE Photonics Technology Letters (2016)

Tao Hu Juhao Li Fang Ren Ruizhi Tang Jinyi Yu

Recently, mode division multiplexing (MDM) has been introduced into optical transmission systems and networks for capacity enhancement. In this letter, we propose a bidirectional passive optical network (PON) architecture based on MDM. The bidirectional optical distribution network of the MDM-PON consists of few-mode fiber, passive mode multiplexer/demultiplexer, and few-mode circulators, all of which are characterized by low modal-crosstalk. Signals in different modes are able to be transmitted and received independently for both downstream and upstream transmission. We experimentally demonstrate the bidirectional MDM-PON transmission over 10-km two-mode optical fiber. The 10-Gb/s ON–OFF-keying signals can be independently transmitted and directly detected without coherent receiver and multiple-input multiple-output processing. Moreover, nonlinear transmission impairments are experimentally investigated.

Demultiplexer

Optical add-drop multiplexer

Time-division multiplexing

Optical cross-connect

Polarization-division multiplexing

Optical line termination

10.1109/lpt.2016.2530663

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Citations (39)

Three-mode mode-division-multiplexing passive optical network over 12-km low mode-crosstalk FMF using all-fiber mode MUX/DEMUX

Optics Communications (2016)

Fang Ren Juhao Li Zhongying Wu Tao Hu Jinyi Yu

Demultiplexer

Optical line termination

Optical add-drop multiplexer

Crosstalk

10.1016/j.optcom.2016.09.051

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Citations (30)

Hybrid passive optical network enabled by mode-division-multiplexing

2022 20th International Conference on Optical Communications and Networks (ICOCN) (2015)

Juhao Li Tao Hu Fang Ren Paikun Zhu Qi Mo

Future passive optical network (PON) should combine various multiplexing method to realize larger-scale access. In this paper, mode division multiplexed (MDM) as a new multiplexing dimension is proposed, in which both the transmission few-mode fiber and the mode multiplexer/demultiplexer have low mode-crosstalk so that no multi-input-multi-output (MIMO) digital signal processing is required at the receiver. We show by experiments the feasibility of MDM-PON and hybrid MDM-TDM-PON. 10-Gb/s on-off keying (OOK) signals are successfully transmitted over 1.8-km 2-mode fiber without MIMO processing.

Demultiplexer

Time-division multiplexing

Optical add-drop multiplexer

Crosstalk

10.1109/icocn.2015.7203680

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Citations (5)

Experimental Demonstration of Mode-Division-Multiplexing and Time-Division-Multiplexing Passive Optical Network

Asia Communications and Photonics Conference 2021 (2014)

Tao Hu Juhao Li Paikun Zhu Qi Mo Yili Ke

We propose and experimentally demonstrate for the first time mode-division-multiplexing and time-division-multiplexing passive optical network (MDM-TDM-PON). Both upstream and downstream transmissions with two individual linearly polarized (LP) spatial modes are investigated.

Time-division multiplexing

Optical add-drop multiplexer

Frequency-division multiplexing

10.1364/acpc.2014.af4b.7

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Citations (6)