Absorption spectroscopy of glucose based on a silicon photonics evanescent sensor

We present a silicon photonics evanescent sensor for glucose absorption spectroscopy. The important design aspects of this miniature sensor are discussed as well as the experimental challenges. We demonstrate detection of glucose down to 14 mmol/L, close to the physiological range of blood glucose in humans

Light collection from scattering media in a silicon photonics integrated circuit

We present a silicon photonics integrated circuit to efficiently couple scattered light into a single mode waveguide. By modulating the phase of N light-capturing elements, the collection efficiency can be increased by a factor N

Novel concept for a broadband co-propagative stationary Fourier transform spectrometer integrated on a Si3N4 waveguide platform

We present a novel concept for a stationary Fourier transform spectrometer integrated on a Si3N4 waveguide platform. This spectrometer can reach high resolution (similar to 1 nm) over a broad spectral band (similar to 100 nm) within an area of 0.1 mm(2)

Efficient light collection and direction-of-arrival estimation using a photonic integrated circuit

Efficient collection of light into a photonic integrated circuit is becoming increasingly important. To couple light from free-space into an integrated circuit, one needs to efficiently guide it into a photonic wire. By using multiple light capturing elements and tuning their respective phases, it is possible to efficiently guide light into a single-mode waveguide, even when the phase front is distorted. Using a similar approach, a direction-of-arrival estimation is also performed. This is useful in free-space optical links or wavefront analysis. A 16 element integrated structure that performs these functions is presented here. Increasing the number of elements and downscaling the size will further improve the performance

Silicon grating structures for optical fiber interfacing and III-V/silicon opto-electronic components

In this paper, we review our work on efficient, broadband and polarization independent interfaces between a silicon-on-insulator photonic IC and a single-mode optical fiber based on grating structures. The high alignment tolerance and the fact that the optical fiber interface is out-of-plane provide opportunities for easy packaging and wafer-scale testing of the photonic IC. Next to fiber-chip interfaces we will discuss the use of silicon grating structures in III-V on silicon opto-electronic components such as integrated photodetectors and microlasers