Researching | DSP-free coherent receivers in frequency-synchronous optical networks for next-generation data center interconnects

Advanced Photonics Nexus, Volume. 4, Issue 3, 036013(2025)

DSP-free coherent receivers in frequency-synchronous optical networks for next-generation data center interconnects

Lei Liu^1,2,3, Feng Liu^1,3, Cheng Peng¹, Bo Xue¹, and William Shieh^1,2,3、*

Author Affiliations

¹Westlake University, School of Engineering, Hangzhou, China

²Westlake Institute for Optoelectronics, Hangzhou, China

³Westlake Institute for Advanced Study, Institute of Advanced Technology, Hangzhou, China

show less

Full Text Get PDF

Figures&Tables (4)

References (26)

Paper Information

References(26)

[1] K. Sheng et al. A 4.6-pJ/b 200-Gb/s analog DP-QPSK coherent optical receiver in 28-nm CMOS. IEEE J. Solid-State Circuits, 58, 45-56(2022). https://doi.org/10.1109/JSSC.2022.3211347

[2] T. Hirokawa et al. Analog coherent detection for energy efficient intra-data center links at 200 Gbps per wavelength. J. Lightwave Technol., 39, 520-531(2020). https://doi.org/10.1109/JLT.2020.3029788

[3] N. Nambath et al. All-analog adaptive equalizer for coherent data center interconnects. J. Lightwave Technol., 38, 5867-5874(2020). https://doi.org/10.1109/JLT.2020.2987140

[4] J. Cheng et al. Comparison of coherent and IMDD transceivers for intra datacenter optical interconnects, 1-3(2019). https://doi.org/10.1364/OFC.2019.W1F.2

[5] E. Ip et al. Coherent detection in optical fiber systems. Opt. Express, 16, 753-791(2008). https://doi.org/10.1364/OE.16.000753

[6] R. Zhang et al. Intra-data center 120Gbaud/DP-16QAM self-homodyne coherent links with simplified coherent DSP, W1G.1(2022). https://doi.org/10.1364/OFC.2022.W1G.1

[7] S.-C. Wang et al. Coherent DSP and system integration technologies for 800g, Tu3B.1(2022). https://doi.org/10.1364/OFC.2022.Tu3B.1

[8] M. Torbatian et al. Performance oriented DSP for flexible long haul coherent transmission. J. Lightwave Technol., 40, 1256-1272(2022). https://doi.org/10.1109/JLT.2021.3134155

[9] J. K. Perin, A. Shastri, J. M. Kahn. Design of low-power DSP-free coherent receivers for data center links. J. Lightwave Technol., 35, 4650-4662(2017). https://doi.org/10.1109/JLT.2017.2752079

[10] R. Ashok et al. Analog domain carrier phase synchronization in coherent homodyne data center interconnects. J. Lightwave Technol., 39, 6204-6214(2021). https://doi.org/10.1109/JLT.2021.3096605

[11] M. Morsy-Osman et al. DSP-free ‘coherent-lite’ transceiver for next generation single wavelength optical intra-datacenter interconnects. Opt. Express, 26, 8890-8903(2018). https://doi.org/10.1364/OE.26.008890

[12] M. Y. Sowailem et al. Self-homodyne system for next generation intra-datacenter optical interconnects. Opt. Express, 25, 27834-27844(2017). https://doi.org/10.1364/OE.25.027834

[13] Z. Zhou et al. Low-latency wavelength-switched clock-synchronized intra-data center interconnects enabled by hollow core fiber. Opt. Express, 31, 24739-24748(2023). https://doi.org/10.1364/OE.487320

[14] J. K. Perin, A. Shastri, J. M. Kahn. Coherent data center links. J. Lightwave Technol., 39, 730-741(2020). https://doi.org/10.1109/JLT.2020.3043951

[15] R. Ashok et al. An endless optical phase delay for harmonic-free phase/frequency shifting in coherent-lite DCIS and microwave photonics. IEEE J. Quantum Electron., 59, 1-10(2023). https://doi.org/10.1109/JQE.2023.3240735

[16] K. Matsuda, N. Suzuki. Hardware-efficient signal processing technologies for coherent pon systems. J. Lightwave Technol., 37, 1614-1620(2018). https://doi.org/10.1109/JLT.2018.2878408

[17] J. Cheng et al. Hardware efficient adaptive equalizer for coherent short-reach optical interconnects. IEEE Photonics Technol. Lett., 31, 1249-1252(2019). https://doi.org/10.1109/LPT.2019.2924465

[18] T. Zhang et al. Cost-effective digital coherent short-reach transmission system with D8QAM and low-complexity DSP. Opt. Express, 29, 11892-11902(2021). https://doi.org/10.1364/OE.422456

[19] Y. Yang et al. Cost-effective and robust DSP scheme for a short-reach coherent system in the presence of transmitter IQ skew and chromatic dispersion. Opt. Lett., 46, 4606-4609(2021). https://doi.org/10.1364/OL.434977

[20] X. Zhang et al. Real time low-complexity adaptive channel equalization for coherent optical transmission systems. Opt. Express, 28, 5058-5068(2020). https://doi.org/10.1364/OE.385370

[21] L. Liu et al. DSP-free demultiplexing for DP-QPSK reception in frequency synchronous optical networks, 1-4(2023). https://doi.org/10.1109/ACP/POEM59049.2023.10369129

[22] L. Liu et al. DSP-free coherent detection for short-reach frequency-synchronous optical networks. J. Lightwave Technol., 42, 5128-5133(2024). https://doi.org/10.1109/JLT.2024.3386700

[23] B. Nebendahl et al. Quality metrics in optical modulation analysis: EVM and its relation to Q-factor, OSNR, and BER, AF3G.2(2012). https://doi.org/10.1364/ACPC.2012.AF3G.2

[24] J. P. Costas. Synchronous communications. Proc. IRE, 44, 1713-1718(1956). https://doi.org/10.1109/JRPROC.1956.275063

[25] N. C. Harris et al. Efficient, compact and low loss thermo-optic phase shifter in silicon. Opt. Express, 22, 10487-10493(2014). https://doi.org/10.1364/OE.22.010487

[26] E. Berikaa et al. Next-generation o-band coherent transmission for 1.6 tbps 10 km intra-datacenter interconnects. J. Lightwave Technol., 42, 1126-1135(2024). https://doi.org/10.1109/JLT.2023.3307504

Tools

Get Citation

Copy Citation Text

Lei Liu, Feng Liu, Cheng Peng, Bo Xue, William Shieh, "DSP-free coherent receivers in frequency-synchronous optical networks for next-generation data center interconnects," Adv. Photon. Nexus 4, 036013 (2025)

Download Citation

EndNote(RIS)BibTex Plain Text

Set citation alerts for article

Save article for my favorites

Paper Information

Category: Research Articles

Received: Dec. 25, 2024

Accepted: Apr. 9, 2025

Published Online: May. 22, 2025

The Author Email: William Shieh (shiehw@westlake.edu.cn)

DOI:10.1117/1.APN.4.3.036013

CSTR:32397.14.1.APN.4.3.036013

Topics

laser devices and laser physics

Lasers and Laser Optics

laser manufacturing

Instrumentation, Measurement and Metrology