Currently browsing: Journal Papers of the Integrated Photonics Laboratory

Co-Integration of a Temperature Tolerant Low Impedance Resonantly Enhanced Silicon Photonics Modulator

Abstract: We report on an optically wideband, resonantly enhanced Mach-Zehnder modulator co-integrated with a 4Ω output impedance, 28Gbd driver from Mellanox Technologies. Error free transmission is demonstrated, at 14Gbps (25Gbps), in 4nm (3nm) wide optical wavelength range at a 10mW

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Design of a high-speed germanium-tin absorption modulator at mid-infrared wavelengths

Abstract: We propose a high-speed electro-absorption modulator based on a direct bandgap Ge0.875Sn0.125 alloy operating at mid-infrared wavelengths. Enhancement of the Franz-Keldysh-effect by confinement of the applied electric field to GeSn in a reverse-biased junction results in 3.2dB insertion losses,

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8-channel 448 Gbit/s Silicon Photonic Transmitter Enabled by Photonic Wire Bonding

  Abstract:   We demonstrate an eight-channel hybrid multi-chip module comprising InP lasers, silicon pho-tonic modulators, and parallel single-mode fibers, all connected via photonic wire bonds. We transmit 28 GBd PAM-4 signals at a total data rate of 448 Gbit/s

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Photonic integrated circuits for multi-color laser engines

  Abstract: Photonic Integrated Circuits (PIC) will change the fundamental paradigms for the design of multi-color laser engines for life sciences. Exemplified with flow cytometry (FCM), integrated optical technology for visible wavelengths will be shown to open a new spectrum of possibilities

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Passively Biased Resonantly Enhanced Silicon Photonics Modulator with High Optical Bandwidth

  Abstract:  Ring resonator modulators reach high modulation efficiencies, are very compact and can be electrically driven as lumped elements. However, their limited optical bandwidth requires temperature stabilization, limiting their power efficiency. A novel ring assisted Mach-Zehnder modulator (MZM) aggressively reduces power

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Hybrid Silicon Photonics Flip-Chip Laser Integration with Vertical Self-Alignment

  Abstract: In this work, we have developed a flip-chip integration process in which the vertical alignment is also guaranteed by a mechanical contact between pedestals defined in a recess etched into the SiP chip and a laser or Semiconductor

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Silicon Photonics based WDM Systems: Chip and Module Level Integration

  Abstract: The implementation of compact, dense WDM transceivers in Silicon Photonics (SiP), that are sufficiently cost and power efficient for Data Centre applications, is a notably challenging endeavour. Semiconductor Mode Locked Lasers (MLL) and Resonant Ring Modulators (RRM) have

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GeSn Lasers for CMOS Integration

  Abstract:  In search of a suitable CMOS compatible light source many routes and materials are under investigation. Si-based group IV (Si)GeSn alloys offer a tunable bandgap from indirect to direct, making them ideal candidates for on-chip photonics and nano-electronics. An overview of recent

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High Speed Resonantly Enhanced Silicon Photonics Modulator with Large Operating Temperature Range

  Abstract: We present a novel resonant Mach–Zehnder modulator whose arms are each loaded with five identical resonators. Size and power consumption are aggressively reduced com- pared to conventional modulators based on linear phase shifters. At the same time, a

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CO2 laser micromachining of nanocrystalline diamond films grown on doped silicon substrates

  Abstract: We demonstrate that nanocrystalline diamond films grown on highly doped silicon substrates can be patterned using a CO2 laser operating at a wavelength of 10.6 μm, where both low doped silicon and diamond exhibit negligible optical absorption. The

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