Stephen E. Ralph

51 papers Misc 1Journal 3Unranked 47

Year	Rank	Type	Title / Venue / Authors
2025	J	`jnl`	An Optical and mm-Wave Converged, Dual-Band, Multi-Beam Rotman Lens Antenna Array System Enabling Simplified Designs of B5G/mmW Base Stations for Ultra Dense Wireless Networks. IEEE Access Lauryn P. Smith, Charles A. Lynch, C. Alex Kaylor, L. Alberto Campos, Lin Cheng, Stephen E. Ralph, Manos M. Tentzeris
2022	—	`conf`	Behavioral PAM-4 VCSEL Model using Stochastic Multimode Rate Equations for Link Design Optimization. OFC Alirio Melgar, Varghese A. Thomas, Benjamin D. B. Klein, Itshak Kalifa, Paraskevas Bakopoulos, Elad Mentovich, Stephen E. Ralph
2022	—	`conf`	Optical Performance Monitoring for Commercial Transceivers using Constellations: Practical Considerations. OFC Daniel Lippiatt, Hyung Joon Cho, Alex Kaylor, Varghese A. Thomas, Steven Searcy, Thomas Richter, Sorin Tibuleac, Stephen E. Ralph
2021	—	`conf`	High Performance Microwave Photonic Downconversion in a Commercial InP Platform. OFC Christian G. Bottenfield, Michael T. Hoff, Varghese A. Thomas, Ardy Winoto, Yuchun Zhou, Ashish Bhardwaj, Gloria E. Hoefler, Richard DeSalvo, Stephen E. Ralph
2021	—	`conf`	Impairment Identification for PAM-4 Transceivers and Links Using Machine Learning. OFC Daniel Lippiatt, Alirio Melgar, Varghese A. Thomas, Siddharth Varughese, Pavel Zivny, Shane A. Hazzard, Stephen E. Ralph
2021	—	`conf`	Robust Topology Optimization for Foundry-Photonics Inverse Design: Examining Compact and Arbitrary Power Splitters. ECOC Alec M. Hammond, Joel Slaby, Gareeyasee Saha, Stephen E. Ralph
2021	—	`conf`	Self-Homodyne Photonic Transmitter in a Monolithic InP Platform for RF Applications. OFC Michael T. Hoff, Christian G. Bottenfield, Varghese A. Thomas, Ardy Winoto, Yuchun Zhou, Ashish Bhardwaj, Gloria E. Hoefler, Stephen E. Ralph
2021	—	`conf`	System-Level Inverse Design for Stokes Receivers on a Commercial Foundry Platform. OFC Alec M. Hammond, Stephen E. Ralph
2021	—	`conf`	Widely Tunable Apodized Bragg Grating Filter Fabricated in a Silicon Photonic Foundry. OFC Gareeyasee Saha, Stephen E. Ralph
2020	—	`conf`	168Gbps PAM-4 Multimode Fiber Transmission through 50m using 28GHz 850nm Multimode VCSELs. OFC Justin Lavrencik, Siddharth Varughese, Nikolay Ledentsov Jr., Lukasz Chorchos, Nikolay N. Ledentsov, Stephen E. Ralph
2020	—	`conf`	A Co-Integrated Silicon-Based Electronic-Photonic Wideband, High-Power Signal Source. OFC Saeed Zeinolabedinzadeh, Patrick Goley, Milad Frounchi, Sunil G. Rao, Christian G. Bottenfield, Gareeyasee Saha, Andy Stark, Stephen E. Ralph, Mehmet Kaynak, Lars Zimmermann, Stefan Lischke, Christian Mai, John D. Cressler
2020	—	`conf`	Accelerating TDECQ Assessments using Convolutional Neural Networks. OFC Siddharth Varughese, Daniel A. Garon, Alirio Melgar, Varghese A. Thomas, Pavel Zivny, Shane A. Hazzard, Stephen E. Ralph
2020	—	`conf`	Convolutional Recurrent Machine Learning for OSNR and Launch Power Estimation: A Critical Assessment. OFC Hyung Joon Cho, Siddharth Varughese, Daniel Lippiatt, Stephen E. Ralph
2020	—	`conf`	Joint Linear and Nonlinear Noise Estimation of Optical Links by Exploiting Carrier Phase Recovery. OFC Daniel Lippiatt, Siddharth Varughese, Thomas Richter, Sorin Tibuleac, Stephen E. Ralph
2020	—	`conf`	Low Complexity Soft Failure Detection and Identification in Optical Links using Adaptive Filter Coefficients. OFC Siddharth Varughese, Daniel Lippiatt, Thomas Richter, Sorin Tibuleac, Stephen E. Ralph
2020	—	`conf`	Optical Interconnects using Single-Mode and Multi-Mode VCSEL and Multi-Mode Fiber. OFC Nikolay N. Ledentsov, V. A. Shchukin, Vladimir P. Kalosha, Nikolay Ledentsov Jr., Lukasz Chorchos, Jaroslaw P. Turkiewicz, Urs Hecht, Patrick Kurth, Friedel Gerfers, Justin Lavrencik, Siddharth Varughese, Stephen E. Ralph
2020	—	`conf`	Spectrum Sensing Applications of FWM-Based Optical Cyclostationary Processor. OFC Jerrod S. Langston, Richard DeSalvo, Stephen E. Ralph
2020	—	`conf`	TDECQ Sensitivity to Algorithmic Implementation and Noise Characterization. OFC Varghese A. Thomas, Alirio Melgar, Siddharth J. Varughese, Daniel Garon, Kan Tan, Shane A. Hazzard, Maria Agoston, Pavel Zivny, Stephen E. Ralph
2019	—	`conf`	55 Gbps error free data transmission with 980 nm VCSELs across 100 m of multiple-mode optical fiber. OECC/PSC Nasibeh Haghighi, Justin Lavrencik, Stephen E. Ralph, James A. Lott
2019	—	`conf`	Error-Free 100Gbps PAM-4 Transmission Over 100m OM5 MMF using 1060nm VCSELs. OFC Justin Lavrencik, Ewa Simpanen, Siddharth Varughese, Alirio Melgar, Varghese A. Thomas, Johan S. Gustavsson, Wayne V. Sorin, Sagi Mathai, Mike Tan, Anders Larsson, Stephen E. Ralph
2019	—	`conf`	High Capacity VCSEL Links. OFC Stephen E. Ralph, Justin Lavrencik
2019	—	`conf`	Identification of Soft Failures in Optical Links using Low Complexity Anomaly Detection. OFC Siddharth Varughese, Daniel Lippiatt, Thomas Richter, Sorin Tibuleac, Stephen E. Ralph
2019	—	`conf`	Microwave Photonic Links: Optimizing SiP Modulator Design and Operation. OFC Christian G. Bottenfield, Varghese A. Thomas, Stephen E. Ralph
2018	—	`conf`	Blind Cyclostationarity-Based Format Classification for Coherent Links. ECOC Jerrod S. Langston, Siddharth Varughese, Richard DeSalvo, Stephen E. Ralph
2018	—	`conf`	Multimode VCSEL Parameter Extraction for Optical Link Models. ECOC Alirio Melgar, Varghese A. Thomas, Stephen E. Ralph
2018	—	`conf`	Optimum VCSEL Apertures for High-Speed Multimode Fiber Links. OFC Justin Lavrencik, Johan S. Gustavsson, Erik Haglund, Anders Larsson, Stephen E. Ralph
2018	—	`conf`	Parameter Extraction through Joint Optimization of Modulation Response and RIN Spectra. OFC Alirio Melgar, Varghese A. Thomas, Justin Lavrencik, Stephen E. Ralph
2018	—	`conf`	Power Efficient Modulation Formats for Error-Free VeSEL MMF Links. ECOC Justin Lavrencik, Siddharth Varughese, Johan S. Gustavsson, Erik Haglund, Anders Larsson, Stephen E. Ralph
2017	—	`conf`	4λ × 100Gbps VCSEL PAM-4 transmission over 105m of wide band multimode fiber. OFC Justin Lavrencik, Siddharth Varughese, Varghese A. Thomas, Gary Landry, Yi Sun, Roman Shubochkin, Kasyapa Balemarthy, Jim Tatum, Stephen E. Ralph
2017	—	`conf`	Error-Free 100Gbps PAM-4 Transmission over 100m Wideband Fiber using 850nm VCSELs. ECOC Justin Lavrencik, Siddharth Varughese, Johan S. Gustavsson, Erik Haglund, Anders Larsson, Stephen E. Ralph
2017	—	`conf`	Experimentally benchmarked fiber propagation model for 50Gbps PAM-4 MMF links employing multimode VCSELs. OFC Alirio A. Melgar-Evangelista, Varghese A. Thomas, Justin Lavrencik, Siddharth Varughese, Stephen E. Ralph
2017	—	`conf`	Polybinary Coding for Low Complexity High Speed Error-Free VCSEL-MMF Links. ECOC Siddharth Varughese, Justin Lavrencik, Johan S. Gustavsson, Erik Haglund, Anders Larsson, Stephen E. Ralph
2016	—	`conf`	Agile micro- and millimeter-wave communication using photonic frequency conversion. OFC Stuart Hughes, Jerrod S. Langston, Richard DeSalvo, Charles Middleton, Elliott Grafer, Stephen E. Ralph, Andrew J. Stark
2016	—	`conf`	Direct measurement of transverse mode correlation and fiber-enhanced RIN through MMF using 850nm VCSELs. OFC Justin Lavrencik, Sriharsha Kota Pavan, Alirio Melgar, Stephen E. Ralph
2016	—	`conf`	Requirements and results for practical VCSEL transmission using PAM-4 over MMF. OFC Stephen E. Ralph
2015	—	`conf`	Addition of in-band crosstalk to the Gaussian noise model. OFC Jie Pan, Pierre Isautier, Mark Filer, Sorin Tibuleac, Stephen E. Ralph
2015	—	`conf`	Agnostic software-defined coherent optical receiver performing time-domain hybrid modulation format recognition. OFC Pierre Isautier, Jerrod S. Langston, Jie Pan, Stephen E. Ralph
2015	—	`conf`	Autonomous receiver architecture for multi-gigabit photonic assisted RF signals. ECOC Pierre Isautier, Jie Pan, Stephen E. Ralph
2015	—	`conf`	Direct measurement of transverse mode correlation and MPN using 900nm VCSELs. OFC Justin Lavrencik, Sriharsha Kota Pavan, David K. Haupt, Stephen E. Ralph
2015	—	`conf`	Linearity requirements of QAM transmitters. OFC Stuart Hughes, Jie Pan, Jerrod S. Langston, Pierre Isautier, Hari Shankar, Stephen E. Ralph
2015	J	`jnl`	Robust Architecture for Autonomous Coherent Optical Receivers. JOCN Pierre Isautier, Kedar Mehta, Andrew J. Stark, Stephen E. Ralph
2014	—	`conf`	50Gbit/s PAM-4 MMF transmission using 1060nm VCSELs with reach beyond 200m. OFC Sriharsha Kota Pavan, Justin Lavrencik, Roman Shubochkin, Yi Sun, Jinkee Kim, Durgesh Vaidya, Robert Lingle, Tomofumi Kise, Stephen E. Ralph
2014	—	`conf`	Experimental demonstration of 51.56 Gbit/s PAM-4 at 905nm and impact of level dependent RIN. ECOC Sriharsha Kota Pavan, Justin Lavrencik, Stephen E. Ralph
2014	—	`conf`	Gaussian noise model aided in-band crosstalk analysis in ROADM-enabled DWDM networks. OFC Jie Pan, Pierre Isautier, Mark Filer, Sorin Tibuleac, Stephen E. Ralph
2014	—	`conf`	Robust autonomous software-defined coherent optical receiver. OFC Pierre Isautier, Jie Pan, Stephen E. Ralph
2013	—	`conf`	Autonomous software-defined coherent optical receivers. OFC/NFOEC Pierre Isautier, Andrew J. Stark, Kedar Mehta, Richard DeSalvo, Stephen E. Ralph
2013	—	`conf`	Fractionally-spaced frequency domain linear crosstalk cancellation with spectral alignment techniques for coherent superchannel optical systems. OFC/NFOEC Jie Pan, Andrew Stark, Cheng Liu, Stephen E. Ralph
2013	—	`conf`	Joint ICI cancellation for superchannel coherent optical systems in nonlinear transmission regimes. OFC/NFOEC Cheng Liu, Jie Pan, Thomas Detwiler, Andrew Stark, Yu-Ting Hsueh, Gee-Kung Chang, Stephen E. Ralph
2008	Misc	`conf`	Integrated TIA-Equalizer for High Speed Optical Link. VLSI Design Saurav Bandyopadhyay, Pradip Mandal, Stephen E. Ralph, Kenneth Pedrotti
2005	—	`conf`	Integrated mixed-signal optoelectronic system-on-a-chip sensor. ISCAS (2) Dae-Ik Kim, Mikkel A. Thomas, Jeffrey J. Lillie, Karla S. Dennis, Benita M. Comeau, Martin A. Brooke, Nan M. Jokerst, Stephen E. Ralph, Clifford L. Henderson
2004	J	`jnl`	Realization of multigigabit channel equalization and crosstalk cancellation integrated circuits. IEEE J. Solid State Circuits Cattalen Pelard, Edward Gebara, Andrew J. Kim, Michael G. Vrazel, Franklin Bien, Youngsik Hur, Moonkyun Maeng, Soumya Chandramouli, Carl Chun, Sanjay Bajekal, Stephen E. Ralph, Bruce Schmukler, Vincent M. Hietala, Joy Laskar