We report on the development of a two-channel digital coherent optics (DCO) module, based on a monolithic InP photonic integrated circuit (PIC) transceiver and SiGe application-specific integrated circuit (ASIC), paired with a real-time 7 nm digital signal processing (DSP) ASIC. The high-performance coherent optical engine, which utilizes digital Nyquist subcarriers and probabilistic constellation shaping (PCS) techniques, enables long-haul and ultra-long-haul transmission distances over mixed fiber and amplifier types. This work discusses the performance of a DCO unit operating at multiple data rates over three practical real-world-like network distances. 800 Gb/s data transmission over a 1,000 km standard single mode fiber link was achieved using a 96 GBd, PCS-64QAM modulation format. Results of extended reaches of over 2,400 km and 5,000 km are also presented with data rates of 600 Gb/s and 400 Gb/s, respectively.

1.6 Tb/s optical engine is enabled through vertical integration of a 2-channel monolithic InP PIC with SiGe electronics and a real-time DSP ASIC operating at 100 Gbaud for 800 Gb/s transmission.

We report on the development of a $2\times 800$ Gbps/wave coherent module based on a monolithic InP transceiver PIC and real-time 7nm DSP ASIC capable of 800Gbps data transmission over record 1000km SMF-28 link using a 96Gbaud, PCS-64QAM modulation format.

We present our recent progress in coherent transmitters (Tx) and receivers (Rx) based on Photonic Integrated Circuits (PIC) on the InP platform. We demonstrate signal generation and transmission at 800 Gbit/s per optical channel.

We present a 1.6Tbps coherent transceiver delivering 800Gbps/wave transmission using integrated Tx/Rx functions with 50GHz bandwidth and 50kHz linewidth tunable lasers on a single 2-channel InP PIC, paired with a SiGe Driver and TIA ASIC.

Vertical optimization of DSP algorithms, analog electronics, optical components and PCB design is critical to maximize the SNR limit of the digital coherent MODEM. We demonstrate a record net ISD of 10.82b/s/Hz for a vertically optimized 256QAM transceiver operating at a symbol rate >50GBd.

We present multi-channel monolithically integrated InP based photonic integrated circuits emitting in both the C and L bands with 200 Gbps transmission per wavelength, enabling long haul links with up to 57.6 Tbps capacity.

We present monolithically integrated multi-channel coherent L-band transmitter (Tx) and receiver (Rx) photonic integrated circuits (PICs) on InP substrates. The L-band PICs are able to provide post-forward error correction (FEC), error-free operation for dual-polarization (DP) 16-QAM coherent transmission at 33 Gbaud. These transceivers operate at 200 Gbps per channel and support 1.2 Tbps aggregate capacity per 6 channel PIC. We also demonstrate in this work a C + L band communication system with two C-band superchannels (2 x 6λ) and three L-band superchannels (3 x 6λ) over a 600 km link. The received signals all have Q > 7.7 dB, which is well above the error-free threshold of the FEC used in this work.

The information rate (IR) of a digital coherent transceiver is constrained by the inherent practical signal-tonoise ratio (SNR) limit. Coded modulation, which is the combination of multi-level modulation and forward error correction, aims to maximize the IR within this SNR envelope. While probabilistic constellation shaping has enhanced this methodology by providing an increase in IR over conventionally employed square quadrature amplitude modulation (QAM) formats, it is the ability to eloquently tune the per wavelength IR by varying the symbol probabilities that has gained this scheme significant traction within optical communications in recent years. As commercial line cards continue their evolution towards 100 GBd and to modulation formats beyond 64QAM, we discuss the merits of probabilistic shaping for high symbol rate digital coherent transceivers in the presence of a practical SNR limit.

We show 100 GBd 32QAM transmission enabled by hybrid integration of InP PICs featuring 40 kHz linewidth widely tunable lasers and SiGe electronics. A mean Q-factor of 6.2 dB after 500 km transmission is measured, demonstrating the feasibility of 800 Gbit/s waves for extended-reach applications.

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text R. Going, S. Wolf, R. Maher, P. Studenkov, V. Lal, H. Tsai, S. Corzine, J. Zhang, B. Behnia, C. Di Giovanni, T. Vallaitis, J. Yan, J. Osenbach, M. Kuntz, T. Frost, H. Mousavi, S. Porto, S. Buggaveeti, H. Hodaei, Z. Wang, X. Xu, P. Evans, J. Rahn, T. Butrie, M. Ziari, D. Welch, and F. Kish, "InP-based Coherent PICs for 100 Gbaud Operation," in OSA Advanced Photonics Congress (AP) 2019 (IPR, Networks, NOMA, SPPCom, PVLED), OSA Technical Digest (Optica Publishing Group, 2019), paper SpM4E.3. Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article

We demonstrate multi-channel InP-based coherent transmitter and receiver photonic integrated circuits hybrid integrated with SiGe driving and amplifying electronics both capable of operating at 880 Gb/s and the transmitter alone up to 1 Th/s per wave. These hybrid assemblies demonstrate optical transmissions across a commercial line system at distances from 200 to 1400 km, with symbol rates between 66-100 GBd, utilizing 16-, 32-, and 64-QAM modulation formats. Additionally, we demonstrate a back-to-back transmission from the TxPIC assembly to a reference receiver at 100 GBd x 32QAM, a 1 This per wavelength capability.

Key advances which enabled the InP photonic integrated circuit (PIC) and the subsequent progression of InP PICs to fully integrated multichannel DWDM system-on-chip (SOC) PICs are described. Furthermore, the current state-of-the-art commercial multichannel SOC PICs are reviewed as well as key trends and technologies for the future of InP-based PICs in optical communications.

InP-based $4\times 600$ Gb/s capable coherent transmitter and receiver assemblies with hybrid integrated SiGe drivers operate at 66GBd, 64QAM over a 200km link. Additionally, a fully packaged pair of modules with real-time DSP ASIC operates error free at 600Gb/s with 69GBd, DP-64QAM.

We report InP-based coherent transmitter PICs with hybrid integrated SiGe drivers operating at 100GBd, 32QAM back-to-back (1 Tb/wave capable), and at 100GBd, 16QAM over 1400km. Coherent Tx (Rx) PICs with hybrid integrated drivers (amplifiers) operate at 66GBd, 64QAM over 200km.

Fully integrated monolithic, multi-channel InP-based coherent receiver PICs and transceiver modules with extended C-band tunability are described. These PICs operate at 33 and 44 Gbaud per channel under dual polarization (DP) 16-QAM modulation. Fourteen-channel monolithic InP receiver PICs show integration and data rate scaling capability to operate at 44 Gbaud under DP 16-QAM modulation for combined 4.9 Tb/s total capacity. Six channel simultaneous operation of a commercial transceiver module at 33 Gbaud is demonstrated for a variety of modulation formats including DP 16-QAM for >1.2Tbit/s aggregate data capacity.

A single wavelength 66 GBd DP-1024QAM transceiver with a coded bit rate of 1.32 Tb/s is demonstrated. Constellation shaping is employed to tailor the symbol distribution to achieve a net bit rate of 680 Gb/s and spectral efficiency of 9.35 b/s/Hz after 400 km transmission.

We demonstrate 2-channel Tx and Rx PICs capable of delivering >700Gbps per channel (via 88Gbaud, 16-QAM dual-polarization modulation) over an 80km unamplified link with per channel extended C-band tunability.