Athermal operation of a multi-section laser for optical communications

  • Bello F.
  • Donegan J.
  • Enright R.
  • M-J-Wallace
  • Meehan R.

Two distinct athermal bias current control procedures are demonstrated for a low-cost, monolithic, three section slotted single mode laser, achieving wavelength stability of ±0.01 nm over a temperature range of 10â?"85°C. This is the first time that athermal performance has been demonstrated for a three-section slotted laser with simple fabrication, ...

Distributed rate-adaptive staircase codes for connectionless optical metro networks

  • Gebhard U.
  • Schmalen L.
  • Zhang L.

We demonstrate a multipoint-to-point network architecture for optical metro networks with distributed FEC encoding based on modified staircase codes. We present a simple rate-adaptation scheme and demonstrate throughput maximization on the network.

Spectral efficiency estimation in periodic nonlinear Fourier transform based communication systems

  • Kamalian M.
  • Le S.
  • Prilepsky J.
  • Turitsyn S.

We evaluate, for the first time, the achievable spectral efficiency of periodic nonlinear Fourier transform based communication systems with hard decision FEC and modulated perturbed plane waves with high order QAM formats, e.g 32QAM-512QAM.

24 Tb/s unrepeatered C-band transmission of real-time processed 200 Gb/s PDM-16-QAM over 349 km

  • Bastide C.
  • Bissessur H.
  • Dupont S.
  • Etienne S.

We present a record unrepeatered experiment with 120 PDM-16-QAM channels at 200 Gb/s over 349.2 km, applying a high-power booster and a ROPA with third-order Raman pumping from the receiver end.

Nonlinear mitigation using probabilistically shaped real-valued modulation formats

  • Buchali F.
  • Eriksson T.
  • Schmalen L.

We experimentally demonstrate probabilistically-shaped modulation formats with increased spectral efficiency and nonlinear mitigation capabilities compared to phase-conjugated twin-waves QPSK at 54.2 Gbaud, yielding 21 % increased reach.

Experimental analysis of the modal evolution in photonic lanterns

  • Alvarado-Zacarias J.
  • Antonio-Lopez J.
  • Chen H.
  • Correa R.
  • Eznaveh Z.
  • Fontaine N.
  • Huang B.
  • Ryf R.

We experimentally analyze the modal evolution in a 10 mode-selective photonic lantern along the tapered transition using a swept-wavelength interferometer. Mode conversion to HOMs occurs closer to the beginning of the photonic lantern taper.

Trans-Atlantic field trial using probabilistically shaped 64-QAM at high spectral efficiencies and single-carrier real-time 250-Gb/s 16-QAM

  • Adamiecki A.
  • Burrows E.
  • Chandrasekhar S.
  • Chen X.
  • Cho J.
  • Correa D.
  • Corteselli S.
  • Dar R.
  • Grubb S.
  • Mckay B.
  • Pan Y.
  • Raybon G.
  • Schmalen L.
  • Winzer P.
  • Zsigmond S.

We transmitted probabilistically shaped 64-QAM at 7.46 b/s/Hz over a 5,523-km inservice EDFA-only amplified trans-Atlantic cable (5.68 b/s/Hz over a looped-back 11,046 km). Using real-time processing we achieve single-carrier 250-Gb/s 16-QAM at 4 b/s/Hz.

Mode-dependent gain characterization of erbium-doped multimode fiber using C2 imaging

  • Alvarado J.
  • Amezcua Correa R.
  • Chen H.
  • Eznaveh Z.
  • Fontaine N.
  • Gonnet C.
  • Huang B.
  • Li G.
  • Lopez J.
  • Ryf R.
  • Schiilzgen A.
  • Sillard P.

We characterize the mode profiles, delays and mode-dependent gains of an erbium-doped step-index multimode fiber using C2 imaging based on a swept-wavelength interferometer. Space-to-time mapping is used to reduce measurement time.

10-Mode photonic lanterns using low-index micro-structured drilling preforms

  • Alvarado-Zacarias J.
  • Amezcua Correa R.
  • Antonio-Lopez J.
  • Chen H.
  • Fontaine N.
  • Hayes J.
  • Huang B.
  • Li G.
  • Poletti F.
  • Ryf R.

We demonstrate low mode-dependent loss 10-mode photonic lanterns using low-index micro-structured drilling preforms. The adiabaticity requirement for lantern tapering can be alleviated by the proposed solution leading to improved performances.

800 Gbit/s dual channel transmitter with 1.056 Tbit/s gross rate

  • Altenhain L.
  • Buchali F.
  • Dumler U.
  • Eriksson T.
  • Idler W.
  • Moller M.
  • Schmid R.
  • Schuh K.
  • Templ W

We demonstrate generation of a 44 Gbaud 64 QAM dual polarization dual channel signal from one laser achieving a gross rate of 1.056 Tbit/s. Fiber transmission reach of 730 km over SSMF is also demonstrated.

Experimental estimation of optical nonlinear memory channel conditional distribution using deep neural networks

  • Estaran J.
  • Renaudier J.
  • Rios-Muller R.

We demonstrate that neural networks can approximate the conditional distribution of non-linear channels with memory. This distribution then feeds the BCJR algorithm to detect transmitted data in experimental IM/DD 3.2-km transmission of 64 GBd PAM4.

Signal processing for spectrally efficient systems

  • Charlet G.
  • Ghazisaeidi A.
  • Muller R.
  • Renaudier J.
  • Schmalen L.

Signal processing for spectrally efficient coherent systems will be presented, including phase estimation, timing estimation, forward error correction coding and nonlinear mitigation techniques which are particularly challenging for high order constellations.

Energy efficiency measures for future core networks

  • Dong X.
  • El-Gorashi T.
  • Elmirghani J.
  • Hinton K.
  • Klein T.
  • Lawey A.
  • Musa M.
  • Nonde L.

We summarize the various techniques developed by the GreenTouch consortium over the past 5 years to minimize core network power consumption. Adopting GreenTouch techniques can potentially improve the energy efficiency by 316× in a 2020 reference network compared to the state of the art in 2010.

QoS-aware protection in flexgrid optical networks

  • Bigo S.
  • Bisson A
  • Dupas A.
  • Layec P

We propose a protection scenario for flexgrid networks whereby premium traffic survives cuts with just-enough bandwidth. We demonstrate a novel two-wavelength Baudrate-switchable optical transmitter reconfiguring in <2.8ms. We compute typical spectral usage boosted by 80%.

Quasi frequency drift suppression for burst mode operation in low-cost thermally-tuned TWDM-PON

  • Barbet S.
  • Bonk R.
  • Borkowski R.
  • Brenot R.
  • Debregeas H.
  • Pfeiffer T.
  • Poehlmann W.
  • Provost J.

To solve the problem of thermally-induced frequency drift in burst-mode transmitters for TWDM access networks, we propose a laser with reduced self-heating, and a simple counter-heating method that demonstrates clear improvement in burst-mode BER measurements.

5Tb/s transmission over 2.2 km of multimode OM2 fiber with direct detection thanks to wavelength and mode group multiplexing

  • Barre N.
  • Benyahya K.
  • Charlet G.
  • Ghazisaeidi A.
  • Jian P.
  • Labroille G.
  • Morizur J.
  • Renaudier J.
  • Sillard P.
  • Simonneau C.

We demonstrate 5Tb/s bidirectional transmission (2.5Tb/s in each direction) over 2.2km of OM2 fiber using selective excitation of 4 mode groups and WDM multiplexing with DMT modulation and direct detection.

Small form factor hybrid Ill-V/Si wavelength-tunable push-pull microring based transmitter

  • Brenot R.
  • Chang C.
  • Chen Y.
  • De Valicourt G.
  • Dong P.
  • Eggleston M.
  • Kim K.
  • Lee J.
  • Maho A.

We demonstrate a compact low-chirp and energy-efficient integrated hybrid Ill-V/Si transmitter based on a Vernier tunable laser that covers the entire C-band, and a low drive voltage push-pull ring modulator that provides large extension ratio and low chirp.

80Gb/s PDM-QPSK PIC-to-PIC transmission based on integrated hybrid silicon/III-V wavelength-tunable transmitter and monolithic silicon coherent receiver

  • Brenot R.
  • Chang C.
  • Chen Y.
  • De Valicourt G.
  • Dong P.
  • Eggleston M.
  • Kim K.
  • Lee J.
  • Maho A.
  • Sinsky J.
  • Zhu C.

We reported the first hybrid Ill-V/Si integrated QPSK wavelength-tunable transmitter based on high-speed ring modulators (BWâ?¼23GHz). 80 Gbit/s PDM-QPSK signal transmission over 100 km with said integrated hybrid transmitter as well as a fully packaged silicon-based coherent receiver is demonstrated.

Switching and multiplexing technologies for mode-division multiplexed networks

  • Ryf R.

¢ Mode-multiplexing over multimode fibers has the potential to scale WDM networks by a factor of 10 or more â?¢ Multimode components like wavelength selective switches and optical amplifiers can scale to large number of modes â?¢ Wavelength selective switches, which are the basic building block for WDM network can ...

A high loss budget 400-Gbps WDM-OFDM long-reach PON over 60 km transmission by 10G-class EAM and PIN without in-line or pre-amplifier

  • Chen J.
  • Chen Y.
  • Chuang C.
  • Liu J.
  • Lu S.
  • Nguyen H.
  • Wang C.
  • Wei C.
  • Wu H.

A 400-Gbps WDM-OFDM LR-PON over 60-km SMF is demonstrated with a 10G-class EAM and PIN. 25-dB loss budget is realized without in-line or pre-amplifier to economically support 128 ONUs with 3.1-Gbps/ONU capacity.