Article
Optics
Theodore J. Morin, Lin Chang, Warren Jin, Chenlei Li, Joel Guo, Hyundai Park, Minh A. Tran, Tin Komljenovic, John E. Bowers
Summary: The study presents a CMOS-foundry-based Si3N4 photonic platform operating at blue and violet wavelengths, achieving record-high intrinsic Q values and low waveguide propagation losses.
Article
Optics
Rakesh Ranjan Kumar, Lars Nielsen, Nicolas Volet, Martijn J. R. Heck
Summary: We present a study on the intra-cavity coherent combining of two DBR lasers on an InP platform, achieving a combining efficiency of 84%. The combined DBR lasers exhibit an on-chip power of 9.5 mW at an injection current of 42 mA in both gain sections simultaneously. This monolithic approach enables the operation of compact and high-power lasers in a single-mode regime with a side-mode suppression ratio of 38 dB, providing a promising direction for integrated photonic technologies.
Article
Chemistry, Multidisciplinary
Ivan Melnichenko, Eduard Moiseev, Natalia Kryzhanovskaya, Ivan Makhov, Alexey Nadtochiy, Nikolay Kalyuznyy, Valeriy Kondratev, Alexey Zhukov
Summary: In this study, we grew submicron-sized InP/InAsP/InP nanostructures on a Si(100) substrate using an original approach. Photoluminescence spectroscopy was used to investigate the individual nanostructures, and tuning of the emission line in the spectral range from 1200 nm to 1550 nm was achieved by adjusting the growth parameters. These results offer a potential approach for the growth of position-controlled heterojunctions based on InAs1-xPx on Si(100) substrate for nanoscale optical devices operating at the telecom band.
Article
Engineering, Electrical & Electronic
Yi Wang, Jorn P. van Engelen, Sander F. G. Reniers, Manuel B. J. van Rijn, Xuebing Zhang, Zizheng Cao, Victor Dolores-Calzadilla, Kevin A. Williams, Meint K. Smit, Yuqing Jiao
Summary: This paper proposes a method for achieving high-resolution grating antennas on SiO2 super-cladding and successfully fabricates a 2-mm long grating antenna, achieving a very narrow beam width and high spatial resolution.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Y. Durvasa Gupta, Guillaume Binet, Wouter Diels, Oliver Abdeen, Tom Gaertner, Moritz Baier, Martin Schell
Summary: This article introduces the introduction of high-speed phase modulators based on the quantum-confined Stark effect to the generic InP foundry platform at Fraunhofer HHI. It describes the technological integration of the high-speed phase Mach-Zehnder modulators (MZM) to the existing generic foundry process and discusses an electro-optical behavioral model for the high speed MZM. The presented MZM structure with a traveling wave electrode length of 5 mm has a V-p of 1.4 V and a small signal electro-optic 3 dB bandwidth of 32 GHz, demonstrating large signal RF operation up to 80 Gbps. These are the highest-performance MZMs in an InP open access integrated photonics foundry platform, to the best of our knowledge.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Liying Lin, Ying Xue, Jie Li, Wei Luo, Jie Huang, Kei May Lau
Summary: The study reports the experimental results of InP-based InAs QDash microdisk lasers grown on silicon, demonstrating their continuous-wave operation in the C and L bands, achieving the lowest threshold and highest operating temperature. Experimental results show that the dominant lasing wavelength of MDLs is influenced by the thickness and diameter of the MDLs.
Article
Optics
Alec M. Hammond, Joel B. Slaby, Michael J. Probst, Stephen E. Ralph
Summary: Density-based topology optimization is utilized to design large-scale, multi-layer grating couplers that comply with commercial foundry fabrication constraints while providing efficient coupling to a single-mode optical fiber without additional optics.
Article
Engineering, Electrical & Electronic
Desalegn Wolde Feyisa, Bin Shi, Rafael Kraemer, Nicola Calabretta, Ripalta Stabile
Summary: This paper presents a monolithically integrated, ultra-compact 8x8 optical space switch based on SOA gates, demonstrating a strictly non-blocking B&S switch architecture for improved network connectivity, bandwidth, and latency requirements.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Vuppu Vinay Pradeep, Melchi Chosenyah, Evgeniy Mamonov, Rajadurai Chandrasekar
Summary: Recent advancements in organic photonics have shown great potential for the development of diverse organic crystal optical components and circuits. This study demonstrates the use of focused ion beam (FIB) milling as a tool to shape organic single crystals into optical cavities with different geometries and dimensions. The shaped crystals exhibit sharp resonance modes in the fluorescence spectrum, confirming their ability to act as cavities. This novel single crystal processing technique enables the industrial-scale production of optical components and circuits, driving the field of crystal photonics forward.
Article
Engineering, Electrical & Electronic
Luis Gonzalez-Guerrero, Robinson Guzman, Muhsin Ali, Alberto Zarzuelo, Jessica Cesar, Devika Dass, Colm Browning, Liam P. Barry, Ilka Visscher, Robert Grootjans, Chris G. H. Roeloffzen, Guillermo Carpintero
Summary: This study demonstrates the application of optical injection locking to a frequency comb of a hybrid InP-Si3N4 dual laser source for high-purity mm-wave generation. The experiment shows that the lasers have potential for continuous locking and achieve high SMSR levels with reduced drift by minimizing bias level applied to the phase actuators.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Rui Ma, Sander Reniers, Yuya Shoji, Tetsuya Mizumoto, Kevin Williams, Yuqing Jiao, Jos van der Tol
Summary: This paper demonstrates an integrated polarization-independent device that can function as an optical isolator or optical circulator, providing high optical isolation performance and advancing towards multifunctional and high-density PICs.
Article
Optics
Pankul Dhingra, Patrick Su, Brian D. Li, Ryan D. Hool, Aaron J. Muhowski, Mijung Kim, Daniel Wasserman, John Dallesasse, Minjoo Larry Lee
Summary: Combining silicon nitride photonics technology with III-V active devices enables on-chip applications across a wide wavelength range. Red and far-red lasers monolithically grown on CMOS-compatible Si substrates show low-threshold current densities and potential applications in visible light photonics.
Article
Optics
Monica Far Brusatori, Daniel N. Duplat, Iterio Degli-Eredi, Lars Nielsen, Peter L. Tonning, Pau Castera, Nicolas Volet, Martijn J. R. Heck
Summary: The research team has achieved a narrow-linewidth laser by integrating InP active-passive platform with an integrated low-loss resonator on a generic foundry platform. This achievement opens up possibilities for hybrid integrated platforms in microwave photonics, with the potential for narrow-linewidth microwave signal generation.
Article
Engineering, Electrical & Electronic
Roberta Bimbova, Ivan Prochazka, Jan Kodet, Josef Blazej
Summary: We have developed photon counting detectors based on InGaAs/InP SPAD for space object laser ranging. Two versions of detector control electronics, passive quenching and active quenching, were developed and tested. These detectors achieved high photon detection probability, low timing jitter, stable detection delay, and low dark count rate.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2022)
Article
Computer Science, Information Systems
Hatem Khalloof, Mohammad Mohammad, Shadi Shahoud, Clemens Duepmeier, Veit Hagenmeyer
Summary: Parallelizing population-based metaheuristics, such as Evolutionary Algorithms, on a cluster computing environment can significantly enhance computational performance. This article presents a scalable software architecture that allows users to combine basic parallelization models of EAs efficiently, showing high potential for scaling up optimization speed of complex problems. Extensive evaluation combining Coarse-Grained and Global Models for solving optimization problems demonstrates the effectiveness of the approach.
INTERNET OF THINGS
(2021)
Article
Engineering, Electrical & Electronic
J. Bolk, H. Ambrosius, R. Stabile, S. Latkowski, X. Leijtens, E. Bitincka, L. Augustin, D. Marsan, J. Darracq, K. Williams
IEEE PHOTONICS TECHNOLOGY LETTERS
(2018)
Article
Engineering, Electrical & Electronic
Dzmitry Pustakhod, Kevin Williams, Xaveer Leijtens
IEEE PHOTONICS JOURNAL
(2018)
Article
Engineering, Electrical & Electronic
Dan Zhao, Stefanos Andreou, Weiming Yao, Daan Lenstra, Kevin Williams, Xaveer Leijtens
IEEE PHOTONICS JOURNAL
(2018)
Article
Engineering, Electrical & Electronic
Dan Zhao, Dzmitry Pustakhod, Kevin Williams, Xaveer Leijtens
IEEE PHOTONICS JOURNAL
(2018)
Article
Engineering, Electrical & Electronic
Marija Trajkovic, Fabrice Blache, Helene Debregeas, Kevin A. Williams, Xaveer J. M. Leijtens
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2019)
Article
Engineering, Electrical & Electronic
Sylwester Latkowski, Dzmitry Pustakhod, Michail Chatzimichailidis, Weiming Yao, Xaveer J. M. Leijtens
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2019)
Article
Engineering, Electrical & Electronic
Weiming Yao, Barry Smalbrugge, Meint K. Smit, Kevin A. Williams, Michael J. Wale
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2019)
Article
Instruments & Instrumentation
M. Beker, G. Bobbink, B. Bouwens, N. Deelen, P. Duinker, J. van Eldik, N. de Gaay Fortman, R. van der Geer, H. van der Graaf, H. Groenstege, R. Hart, K. Hashemi, J. van Heijningen, M. Kea, J. Koopstra, X. Leijtens, F. Linde, J. A. Paradiso, H. Tolsma, M. Woudstra
JOURNAL OF INSTRUMENTATION
(2019)
Article
Engineering, Electrical & Electronic
Weiming Yao, Xiao Liu, M. K. Matters-Kammerer, Arezou Meighan, Marc Spiegelberg, Marija Trajkovic, Jos J. G. M. van der Tol, Michael J. Wale, Xi Zhang, Kevin Williams
Summary: Integrating photonics with electronics is crucial for improving bandwidth, speed, and energy efficiency in information transport systems. This review focuses on a method based on wafer-scale polymer bonding, addressing challenges in circuit architecture, simulation framework, and interconnect technology. The approach introduced aims to achieve broadband high-density interconnects while simplifying complexity with DC-coupled driver connections to modulators.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Xaveer Leijtens, Rui Santos, Kevin Williams
Summary: This study presents high density multi-channel optical multiprobes for on-wafer parallel testing of photonic integrated circuits. The probes, fabricated in an oxynitride platform, demonstrated simultaneous passive alignment of 32 optical connections with low optical power variation. The concept was further validated through wavelength-dependent net modal gain measurements of integrated semiconductor optical amplifiers.
IEEE PHOTONICS JOURNAL
(2021)
Article
Optics
Lukas Puts, Xaveer Leijtens, Pavel Cheben, Jens Schmid, Sander Reniers, Daniele Melati
Summary: The study demonstrates the anti-reflection properties of lithographically defined subwavelength gratings applied to integrated waveguides on the InP membrane-on-silicon platform. The use of gradient index effect creates a smooth index transition between core material and air, achieving reflections below -30 dB at a wavelength of 1550 nm. Experimental results show that relative reflections as low as -25 dB can be achieved using Mach-Zehnder interferometers as test structures.
Proceedings Paper
Computer Science, Information Systems
A. Meighan, M. J. Wale, K. A. Williams
Summary: This paper introduces a new high-density, 27 μm wide Mach-Zehnder modulator with a new coplanar strip-line electrode, which enables velocity and impedance matching, leading to a 3.6 times increase in 3dB electro-optical bandwidth compared to a more conventional design.
2021 EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Sylwester Latkowski, Dzmitry Pustakhod, Michail Chatzimichailidis, Xaveer Leijtens, Kevin Williams
2020 22ND INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS (ICTON 2020)
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
A. Meighan, Y. Yao, M. J. Wale, Ka Williams
2020 IEEE PHOTONICS CONFERENCE (IPC)
(2020)
Proceedings Paper
Optics
K. A. Williams, M. Trajkovic, V Rustichelli, F. Lemaitre, H. P. M. M. Ambrosius, X. J. M. Leijtens
OPTICAL INTERCONNECTS XIX
(2019)
