Publications of the Integrated Photonics Laboratory

PIX4life: photonic integrated circuits for bio-photonics

    Abstract: As key enabling technology, photonics has become critical in many fields. Advances in fabrication technologies have realized photonic integrated circuits not only for telecommunication wavelengths but also in the mid-infrared, and very importantly, in the visible. The

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Air-clad suspended nanocrystalline diamond ridge waveguides

Abstract: A hybrid group IV ridge waveguide platform is demonstrated, with potential application across the optical spectrum from ultraviolet to the far infrared wavelengths. The waveguides are fabricated by partial etching of sub-micron ridges in a nanocrystalline diamond thin film

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Integrated bio-photonics to revolutionize health care enabled through PIX4life and PIXAPP

    Abstract: Photonics has become critical to life sciences. However, the field is far from benefiting fully from photonics’ capabilities. Today, bulky and expensive optical systems dominate biomedical photonics, even though robust optical functionality can be realized cost-effectively on

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Wideband multi-stage CROW filters with relaxed fabrication tolerances

    Abstract: We present wideband and large free spectral range optical filters with steep passband edges for the selection of adjacent WDM communication channels that can be reliably fabricated with mainstream silicon photonics technology. The devices are based on

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Modification of Level Dependent ASE-Signal Beat Noise by Optical and Electrical Filtering in Optically Preamplified Direct Detection Receivers

  Abstract: We derive compact equations describing the modification of amplified spontaneous emission signal beat noise arising from optical and electrical filtering in optically preamplified direct detection receivers. In particular, we show that this modification typically results in a further

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Quantum confinement effects in GeSn/SiGeSn heterostructure lasers

  Abstract: The development of a light source on Si, which can be integrated in photonic circuits together with CMOS electronics, is an outstanding goal in the field of Silicon photonics. This could e.g. help to overcome bandwidth limitations and

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Calibrated Link Budget of a Silicon Photonics WDM Transceiver with SOA and Semiconductor Mode-Locked Laser

  Abstract: Based on the single channel characterization of a Silicon Photonics (SiP) transceiver with Semiconductor Optical Amplifier (SOA) and semiconductor Mode-Locked Laser (MLL), we evaluate the optical power budget of a corresponding Wavelength Division Multiplexed (WDM) link in which

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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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