Publications of the Integrated Photonics Laboratory

Silicon Photonics Transmitter with SOA and Semiconductor Mode-Locked Laser

Abstract: We experimentally investigate an optical link relying on silicon photonics transmitter and receiver components as well as a single section semiconductor mode-locked laser as a light source and a semiconductor optical amplifier for signal amplification. A transmitter based on

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Silicon Photonics: Modulators make efficiency leap

    Abstract: Significant improvements in the loss and drive voltage of silicon photonics-based optical phase modulators look set to benefit both short-reach and long-distance data communications. J. Witzens, “Silicon Photonics: Modulators make efficiency leap,” Nat. Phot. 11, 459-462 (2017).

Silicon nitride photonic integrated circuits for multi-color optical engines with application in flow cytometry

Abstract: We are developing a silicon nitride photonic integrated circuit to replace dichroic mirrors, acousto-optic tunable filters and fiber switches inside a multi-color laser engine aimed towards fluorescent microscopy and flow cytometry. Both the application space and design aspects will

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Reduced threshold microdisk lasers from GeSn/SiGeSn heterostructures

Abstract: We present optically pumped lasing from group IV GeSn/SiGeSn heterostructures. A comparison between double heterostructure and multi-quantum-well microdisk cavities reveals advantages of the multi-well design. Strongly reduced lasing thresholds compared to values from bulk devices are observed. D. Stange,

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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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