Demonstration of all-optical MDM/WDM switching for short-reach networks

Wu, Zhongying; Li, Juhao; Ge, Dawei; Ren, Fang; Zhu, Paikun; Mo, Qi; Li, Zhengbin; He, Yongqi

doi:10.1364/oe.24.021609

Cited by 24 publications

(3 citation statements)

References 13 publications

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“…Therefore, related technologies such as wavelength division multiplexing (WDM) and mode-division multiplexing (MDM) are adopted to improve transmission capacity. Wherein, MDM technology can multiplex multiple modes in a single wavelength channel to increase transmission capacity [4][5][6] . In order to build MDM networks on silicon chips, mode converters, mode demultiplexers and multiplexers, mode filters, mode-division multiplexing switches, etc.…”

Section: Introductionmentioning

confidence: 99%

Mode multiplexing 1×4 waveguide optical switch based on phase-change materials

Cui,

Zhang,

Wang

et al. 2023

Optical Design and Testing XIII

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With the explosive data growth over internets and communications, traditional optoelectronic switching technologies meet many challenges, such as the lower switching speed, insufficient capacity and excessive power consumption et al. The optical interconnect technologies have developed and present very good advantages, e.g. the expanded bandwidth, high switching speed, low energy consumption, small sizes and high integration. Optical switch is a kind of very critical components for optical interconnect technologies. In this paper, we propose a mode multiplexing 1×4 waveguide optical switch structure, which is a silicon based integrated switch with non-volatile chalcogenide optical phase-change material (C-OPCM) thin films. The optical mode transmission characteristics of the switching paths analyzed and calculated by the supermode coupling theory. The optical switch device is theoretically modeled and analyzed by using a threedimensional finite-difference time-domain (3D-FDTD) method. The 1×4 optical switch device can transmit different optical modes by switching different phase states of C-OPCM films. As inputting a TE0 mode, the outputs are four different order modes of TE0, TE1, TE2, and TE3. Different switching channels select different transmission modes. Such a 1×4 optical waveguide switch presents low insertion losses (ILs) and relative high extinction ratios (ERs). The insertion losses are respectively as low as 0.7 dB, 0.27 dB, 0.15 dB, and 0.54 dB for TE0 mode at output portO1, TE1 mode at output port O2, TE2 mode at output port O3, and TE3 mode at port output O4. The extinction ratios are separately as high as 20.3 dB, 23.29 dB, 17.55 dB, and 18.63 dB . This kind of phase-change optical switch devices exhibit excellent transmission characteristics, non-volatility, and smart structures and high integration, which have potential application values in the fields of photonic integration and photonic networks.

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Section: Introductionmentioning

confidence: 99%

Mode multiplexing 1×4 waveguide optical switch based on phase-change materials

Cui,

Zhang,

Wang

et al. 2023

Optical Design and Testing XIII

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“…As one category of SDM, mode division multiplexing (MDM) has also been studied recently [19]. For example, orbital angular momentum (OAM) [20], linearly polarized mode (LPM) [21] and cylindrical vector beam (CVB) [22] have been demonstrated in MDM-based shortreach optical interconnection as the individual channels. Among of them, CVBs are distinguished by their spatially inhomogeneous states of polarization, such as radial and azimuthal polarization, which could be used to increase the transmission data rate [23], [24].…”

Section: Introductionmentioning

confidence: 99%

Demonstration of Low-Cost EML Based 240 Gbit/s DFT-Spread DMT Signal Transmission Over Few-Mode Fiber With Cylindrical Vector Beam Multiplexing

Sun

Zou

et al. 2019

IEEE Access

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In this paper, we experimentally demonstrated the high-speed low-cost mode-divisionmultiplexed (MDM) discrete multi-tone (DMT) signal transmission based on cylindrical vector beam (CVB) multiplexing over few-mode fiber (FMF) with intensity modulation and direct detection (IM/DD) utilizing electro-absorption modulated laser (EML). Two CVBs (TM01 and TE01 modes) are employed for signal transmission simultaneously with the minimum mode isolation of 16.7 dB between them after transmission over 5 m 4-mode FMF. The digital discrete Fourier transform-spread (DFT-spread) and pre-equalization techniques are implemented in transmitter to improve the system performance. By adopting the proposed schemes, the 240 Gbit/s DFT-spread DMT signal has been transmitted successfully over 5 m FMF below the bit-error-ratio (BER) of 3.8×10 −3 which is the hard-decision forward-error-correction (HD-FEC) threshold. The required received optical powers (ROPs) of the two CVBs (TM01 and TE01 modes) are −7.27 dBm and −7.15 dBm, respectively. The experimental results show that CVB-based multiplexing technology combined with advanced modulation format could be a potential candidate for high-speed low-cost server backplane optical interconnection. INDEX TERMS High-speed backplane, optical interconnection, cylindrical vector beam (CVB), few-mode fiber, mode division multiplexing.

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“…Multi-wavelength fiber lasers have been widely discussed because of their potential applications in wavelength division multiplexing (WDM) optical communication systems [1,2], optical fiber sensing [3], optical spectroscopy [4] and microwave generation [5]. Meanwhile, erbium-doped fiber (EDF) as a gain medium has been widely employed in multiwavelength fiber lasers due to its low intensity noise, high output power and high compatibility [6].…”

Section: Introductionmentioning

confidence: 99%

Spatial-mode switchable, multi-wavelength all-fiber erbium-doped fiber (EDF) laser based on low modal crosstalk mode multiplexer/demultiplexer (MUX/DEMUX)

Ren¹,

Zhangsun²,

Lu³

et al. 2019

Laser Phys.

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We experimentally demonstrate an all-fiber erbium-doped fiber ring laser based on a Sagnac interferometer with a low modal crosstalk mode multiplexer/demultiplexer (MUX/DEMUX). Three linearly polarized (LP) modes are generated by mode MUX/DEMUX, which consists of cascaded mode-selective couplers. The proposed fiber laser can simultaneously achieve spatial-mode switching and multi-wavelength tuning. In the experiment, single-, dual-, and triple-wavelength lasing outputs for LP 01 , LP 11 , LP 21 and hybrid modes are obtained. The stabilities for LP 01 , LP 11 , LP 21 and hybrid modes are investigated in more than 20 min, 16 min, 12 min and 16 min, respectively. Moreover, the mode intensity profiles, the OSNRs of the lasing output and the slope efficiencies are also measured.

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Demonstration of all-optical MDM/WDM switching for short-reach networks

Cited by 24 publications

References 13 publications

Mode multiplexing 1×4 waveguide optical switch based on phase-change materials

Mode multiplexing 1×4 waveguide optical switch based on phase-change materials

Demonstration of Low-Cost EML Based 240 Gbit/s DFT-Spread DMT Signal Transmission Over Few-Mode Fiber With Cylindrical Vector Beam Multiplexing

Spatial-mode switchable, multi-wavelength all-fiber erbium-doped fiber (EDF) laser based on low modal crosstalk mode multiplexer/demultiplexer (MUX/DEMUX)

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