125-µm-Cladding 8-Core Multi-Core Fiber Realizing Ultra-High-Density Cable Suitable for O-Band Short-Reach Optical Interconnects

Hayashi, Tetsuya; Nakanishi, Tetsuya; Hirashima, Kaoru; Shimakawa, Osamu; Sato, Fumiaki; Koyama, Koichi; Furuya, Akira; Murakami, Yasunori; Sasaki, Takashi

doi:10.1364/ofc.2015.th5c.6

Cited by 25 publications

(8 citation statements)

References 8 publications

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“…The optical source is a 4-channel thermally tuned external cavity laser (ECL, LaserBlade, coherent solutions) with a maximum output power of 13.6 dBm. An arbitrary waveform generator (AWG, 65 GSa/s, M8195A, Keysight) and a 40-GHz Mach-Zehnder modulator (MZM, MX-LN-40, photline) are used to generate 10 GBaud PAM-4 optical signals with PRBS length of 2 17 . A raised cosine pulse shaping filter with a roll-off factor of 0.18 is used for pulse shaping.…”

Section: Measurement Of Crosstalk Induced Carrier Beating Impairmentmentioning

confidence: 99%

“…For short-reach IM/DD systems, many types of homogeneous [15]- [17] or heterogeneous [18] WC-MCF have been optimized with different XT threshold. For different kinds of WC-MCF based systems, the XT threshold has been studied, such as adaptive direction-detection orthogonal frequencydivision multiplexing (DD-OFDM) signals [19], the on-off key (OOK) signal [20], [21], the 4-level pulse amplitude modulation (PAM-4) signal [22] and the PAM-8 signal [23].…”

Section: Introductionmentioning

confidence: 99%

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Carrier Beating Impairment in Weakly Coupled Multicore Fiber-Based IM/DD Systems

Zhao

Gan

et al. 2020

IEEE Access

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Weakly coupled multicore fiber (WC-MCF) is promising for use in short-reach fiber telecommunication systems in the near future. Intercore crosstalk (XT) plays an important role in WC-MCF-based short-reach intensity-modulation/direct-detection (IM/DD) systems, because XT can significantly degrade system performance. For the first time, the combined effect of intercore XT and the frequency offset between optical carriers, which is defined as the carrier beating impairment (CBI), is measured and characterized by experiments and numerical simulations. The experimental results show that the CBI causes large fluctuations in the signal-to-noise ratio (SNR) with a normally tolerable XT level. Such SNR fluctuations can additionally reduce the system's XT tolerance (at worst 1-dB SNR degradation) by as much as 20 dB for 4-level pulse amplitude modulation (PAM-4) transmission. The simulation results show that the CBI is mainly affected by the specific properties of the laser source and the modulation depth of the transmitted signals. These results suggest that the XT should be designed to be much smaller for WC-MCF-based short-reach IM/DD systems when there is the CBI. II. WC-MCF-BASED SHORT-REACH IM/DD SYSTEMS A. LASER SHARED SCHEME AND LASER NON-SHARED SCHEME We introduce two types of transmitter schemes for the WC-MCF-based short reach IM/DD systems, namely, the

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Section: Measurement Of Crosstalk Induced Carrier Beating Impairmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Carrier Beating Impairment in Weakly Coupled Multicore Fiber-Based IM/DD Systems

Zhao

Gan

et al. 2020

IEEE Access

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“…In addition, an 8-core MCF for O-band short-reach application was also proposed [140,141]. This MCF maintained a cladding diameter of 125 m, which is the same as that in a conventional SMF, to reduce the overhead of manufacturing equipment.…”

Section: Short Reach/datacommentioning

confidence: 99%

Review of Space-Division Multiplexing Technologies in Optical Communications

Awaji¹

2019

IEICE Trans. Commun.

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SUMMARYThe potential transmission capacity of a standard single-mode fiber peaks at around 100 Tb/s owing to fiber nonlinearity and the bandwidth limitation of amplifiers. As the last frontier of multiplexing, space-division multiplexing (SDM) has been studied intensively in recent years. Although there is still time to deploy such a novel fiber communication infrastructure; basic research on SDM has been carried out. Therefore, a comprehensive review is worthwhile at this time toward further practical investigations.

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“…Meanwhile, SDM fibers are actively explored to scale up system capacity through spatial efficiency [2]. A combination of high bandwidth devices and spatial efficiency through multicore fibers (MCFs) seems to be a viable solution to enable high bandwidth-density, having enormous potential to increase the throughput per single-wavelength and single-fiber to 1 Tb/s for short-reach optical interconnects [4,9,10].…”

Section: Introductionmentioning

confidence: 99%

7×149 Gbit/s PAM4 Transmission over 1 km Multicore Fiber for Short-Reach Optical Interconnects

Ozoliņš

Pang

Udaļcovs

et al. 2018

Conference on Lasers and Electro-Optics

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125-µm-Cladding 8-Core Multi-Core Fiber Realizing Ultra-High-Density Cable Suitable for O-Band Short-Reach Optical Interconnects

Cited by 25 publications

References 8 publications

Carrier Beating Impairment in Weakly Coupled Multicore Fiber-Based IM/DD Systems

Carrier Beating Impairment in Weakly Coupled Multicore Fiber-Based IM/DD Systems

Review of Space-Division Multiplexing Technologies in Optical Communications

7×149 Gbit/s PAM4 Transmission over 1 km Multicore Fiber for Short-Reach Optical Interconnects

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