Compact polymer components for an integrated add-drop multiplexer

A phasar and a digital thermo optic switch have been designed and processed in a high index contrast polymer technology. Both devices are small enough to fabricate two integrated add-drop multiplexers on one 4 inch wafe

Basic opto-electronics on silicon for sensor applications

A general platform for integrated opto-electronic sensor systems on silicon is proposed. The system is based on a hybridly integrated semiconductor laser, ZnO optical waveguides and monolithic photodiodes and electronic circuiry

Een modescrambler/ modefilter voor glasvezels

Bij het uitvoeren van dempings- en pulsdispersie (bandbreedte) metingen aan multimode glasvezels beïnvloedt de modeverdeling in de glasvezel in het algemeen de meetresultaten. Om betrouwbare meetresultaten te verkrijgen is het daarom gewenst de geëxciteerde modeverdeling te beheersen en wel zo, dat de zogenaamde stationaire modeverdeling zo goed mogelijk wordt benaderd. Ook is het soms gewenst dat de modeverdeling onafhankelijk is van de lichtbron. Om de bovenstaande doelstellingen te bereiken kan gebruik worden gemaakt van een modefilter/modescrambler, bestaande uit in een rij geplaatste paaltjes, waartussen de glasvezel gevlochten wordt. De bruikbaarheid van deze methode wordt aangetoond met een theoretisch model en met experimentele resultaten.Electrical Engineering, Mathematics and Computer ScienceMicrogolftechnie

Hybrid Coupling of Laser Light sources to Silicon (Oxy)Nitride Based Waveguides

An efficient method was developed to couple a diode laser to a high contrast waveguides. The laserdiodes were mounted with sub-micron precision using a thermocompression mounting technique. An AlGaAs (λ = 850 nm) laserdiode was coupled to a SiON based slab waveguide (efficiency η EQ 25 - 30%) and to a Si2N4 based ridge waveguide (efficiency η = 20%) on silicon. A start has been made with the determination of the lifetime of thermocompression mounted laserdiodes. AlGaAs (λ = 850 nm) lasers as well as AlGaInP (λ = 675 nm) lasers were tested. The first results indicate that lifetimes in the range 10 - 30 years are possible for CW operation at 30°C. The laser- waveguide coupling technique is demonstrated in a sensor platform

Hybrid integrated electro-optic sensor platform

Optical sensors are an important class of sensors. They can offer high sensitivity, high electromagnetic immunity and compactness. An important sub-class is formed by the fiber-optic based sensors. They are used among others for smart structures, where the fiber is used in a distributed sensor configuration. In these systems the light generation and sensing is done in a remote unit. Another sub-class of optic sensors receiving increased attention are the electrooptic integrated sensors. Due to the integration of electronics and optical circuitry on one and the same silicon substrate miniature smart optical sensors can be realized. The price to pay for this marriage between electronics and optics is the loss of electro-magnetic immunity. In this paper we report on the development of a toolbox for electro-optic integrated sensors. Various components, part of the toolbox, like a laser-waveguide coupling, detector-waveguide coupling, optical waveguide structures are briefly discussed. The building blocks are combined in a basic sensor platform, thus showing the maturity of the toolbox approach. By choosing appropriate building blocks from the toolbox, in combination with a specific optical sensor circuit, specialized sensors can be realized

Technological and physical compatabilities in hybrid integration of laser and monolithic integration of waveguide, photodetector and CMOS circuits on silicon

In this paper, technological and physical compatibilities in hybrid integration of AlInGaP laser and monolithic integration of ZnO monomode waveguide, pin-photodetector, CMOS circuits for laser power control and signal amplification on silicon substrate are studied. Prospective problems and their possible solutions are discussed. Also experimental results are presented