Low cost TWDM by wavelength-set division multiplexing

Pohlmann, W.; Deppisch, B.; Pfeiffer, Thomas; Ferrari, C.; Earnshaw, Mark; Duque, Alex; Farah, Robert; Galaro, Joe; Kotch, James; Lau, Man Fai; Veen, D.T. van; Vetter, Peter

doi:10.1002/bltj.21633

Cited by 9 publications

(3 citation statements)

References 9 publications

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“…The ONU-Tx's ER is 9 dB. Under TWDM-operation [12][13][14], the ONU-Tx's can be thermally tuned to different wavelength channels. The OLT-Rx's (R3) comprise a preamplifier SOA (16 dB smallsignal gain, 7 dB noise figure, and −2 dBm saturation input power [−3 dB]), a 20 nm wide ASE filter, a wavelength-set (WS) filter, APDs, and a ParBERT for BER evaluation.…”

Section: Burst-mode Investigation For Rx Configuration (R3)mentioning

confidence: 99%

Beneficial OLT Transmitter and Receiver Concepts for NG-PON2 Using Semiconductor Optical Amplifiers [Invited]

Bonk¹,

Schmuck²,

Poehlmann³

et al. 2015

J. Opt. Commun. Netw.

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Optical line termination transmitter (Tx) and receiver (Rx) concepts using a semiconductor optical amplifier (SOA) for the next generation of passive optical networks (NG-PON2) are experimentally compared. In general, a single SOA per wavelength channel at the Tx and a configuration comprising a single SOA followed by avalanche photodiodes (APDs) at the Rx are beneficial in terms of signal quality and power dynamic range. Additionally, we introduce a cost-effective bi-directional SOA approach for simultaneous upstream preamplification and downstream boosting. Our results indicate its feasibility for mid-class loss budget classes of NG-PON2.Index Terms-Next-generation passive optical network (NG-PON2); Passive optical network (PON); Semiconductor optical amplifier (SOA); Time-and-wavelength-division multiplexing passive optical network (TWDM-PON).

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Section: Burst-mode Investigation For Rx Configuration (R3)mentioning

confidence: 99%

Beneficial OLT Transmitter and Receiver Concepts for NG-PON2 Using Semiconductor Optical Amplifiers [Invited]

Bonk¹,

Schmuck²,

Poehlmann³

et al. 2015

J. Opt. Commun. Netw.

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“…A research is adopted by Full Service Access Network (FSAN) Group to design a Next Generation Passive Optical Network (NG-PON2) system, which it can support a high bandwidth optical network systems to saturate and handle the current hungry for higher bandwidth. The aim is to deliver bandwidth of at minimum 40 Gbit/s downlink and 10 Gbit/s uplink [22]. A conducted research [23] adopting SCM-OCDMA by using simulations of a subcarrier multiplexing optical code-division multiple-access (SCM-OCDMA) system in conjunction with selective mode excitation of LP01 and LP02 modes in multimode fiber, have demonstrated the achieved delivery of data at 2.4 GHz for two users over optimized bandwidth and bit error rate (BER) of six channels.…”

Section: Optical Multiplexing For Scm In Rofmentioning

confidence: 99%

Radio Subcarrier Spacing Effect on SCM-MDM Using HG Modes in Radio-Over-Fiber

2015

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In this paper, a radio-over-fiber (RoF) design for wireless local area networks (WLANs) on the 5GHz radio frequency band is proposed as an effort to alleviate radio frequency spectrum scarcity and allow frequency re-use. The design incorporates two multiplexing schemes, subcarrier multiplexing (SCM) for increasing the efficiency of radio frequency in the last mile, and MDM for converging several sets of radio subcarriers from different locations into a high-speed optical signal through a single multimode fiber backbone. The effects of different radio channel spacing on the system performance were investigated. A total throughput of 19.5 Gb/s is achieved, 6.5Gb/s per each of the three radio channels.

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“…A wavelength-set division multiplexing (WSDM) scheme was recently developed by Bell Labs as the preferred solution for cost reasons [18]. In this scheme, an ONU uses a DFB-LDbased Tx without a wavelength selection and with an on-chip heater for the wavelength tuning.…”

mentioning

confidence: 99%

Effects of Upstream Incoherent Crosstalk Caused by ASE Noise from Tx-Disabled ONUs in XG-PONs and TWDM-PONs

Lee¹,

Rhy²,

Lee³

et al. 2016

ETRI J

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A large incoherent crosstalk (IC) caused by amplified spontaneous emission (ASE) noise power from Txdisabled optical network units and a differential path loss has been shown to degrade upstream transmission performance in time-division multiplexing passive optical networks. This paper considers the IC-induced power penalty of an upstream signal both in an XG-PON and in a TWDM-PON. We investigate the degradation of the extinction ratio and relative intensity noise through a simulation and experiments. For the XG-PON case, we observe a 9.6 dB difference in the level of ASE noise power from Tx-disabled ONUs (hereafter known simply as ASE noise) between our result and the ITU-T XG-PON PMD recommendation. We propose an optical filtering method to mitigate an IC-induced power penalty. In the TWDM-PON case, the IC-induced power penalty is naturally negligible because the ASE noise is filtered by a wavelength multiplexer at the optical line terminal. The results provide design guidelines for the level of ASE noise in both XG-PONs and TWDM-PONs.

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Low cost TWDM by wavelength-set division multiplexing

Cited by 9 publications

References 9 publications

Beneficial OLT Transmitter and Receiver Concepts for NG-PON2 Using Semiconductor Optical Amplifiers [Invited]

Beneficial OLT Transmitter and Receiver Concepts for NG-PON2 Using Semiconductor Optical Amplifiers [Invited]

Radio Subcarrier Spacing Effect on SCM-MDM Using HG Modes in Radio-Over-Fiber

Effects of Upstream Incoherent Crosstalk Caused by ASE Noise from Tx-Disabled ONUs in XG-PONs and TWDM-PONs

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