Spectral imaging has many applications, from methane detection using satellites to disease detection on crops. However, spectral cameras remain a costly solution ranging from 10 thousand to 100 thousand euros for the hardware alone. Here, we present a low-cost multispectral camera (LC-MSC) with 64 LEDs …

We report on the calibration and testing of a fiber Bragg grating (FBG)-based 2D-shape sensing strip for real-time monitoring of the position and orientation of the human spine during gait. The strip is evaluated for its use as an input for control of an exoskeleton for patients with spinal cord injury. …

Multiple scientific and industrial applications such as telecommunication and quantum cryptography causing a rise in the development of the superconducting nanowire single photons detectors (SNSPD). In the last decade, the characteristics of the detectors improved but run against the problem that the …

Integrated photonic sensors are promising devices for various sensing applications due to their low cost, small size, and high sensitivities that can be reached. In this thesis, ring resonators and three-port Mach-Zehnder interferometer (MZI) devices fabricated on Silicon-On-Insulator were compared for …

Abstract A setup is designed and constructed to perform specular reectance spectroscopy on an enzymatic reaction, while simultaneously monitoring the heat produced by the reaction using a FLIR camera. The spectrum of ethanol was recorded using two MCT detectors and showed clear overlap with literature …

Voor optische koppeling van glasvezels in andere optische geleiders kan een evanescent veld worden gebruikt. Een evanescent veld kan worden gestimuleerd door de glasvezels dunner te maken. Een kleine diameter resulteert in een groot veld rondom the glasvezel. Het dunner maken (tapering) kan worden …

Voor de oppervlakkige hyperthermiebehandeling is het belangrijk dat de eigenschappen van de applicator worden gereproduceerd. De patiënten krijgen gemiddeld 5 behandelingen met een tussenperiode van één week tussen de behandelingen. Hierbij is het belangrijk dat de applicator op de zelfde positie wordt …

Het KNMI is in het bezit van een Raman lidar met polarisatie ontvanger die in dit onderzoek op twee verschillende kalibratiemethoden is getest. Uit dit onderzoek moet blijken welke methode onder de gegeven omstandigheden de juiste benadering geeft voor de depolarisatie ratio. De polarisatie ontvanger …

This thesis describes how the abundance of CO2 a ects the porosity of H2O:CO2 ice mixtures deposited at di erent growth temperatures ranging from 30 - 70 K. The mixing ratios of the used ice samples H2O:CO2 = 10:1, 4:1 and 2:1 are of astrophysical relevance. Laser optical interference is used to monitor …

A laboratory test setup is built to transfer and actively stabilize an ultrastable signal, obtained from a laser with sub-Hz linewidth, trough a 5 km long fiber link. The fiber noise is measured and compensated via a feedback loop acting on an AOM that can change the frequency (and therefore the phase) …