Papers by Douwe Geuzebroek
Sensors and Actuators B: Chemical, 2016
Sensors and Actuators B Chemical
IEEE Photonics Conference 2012, 2012
ABSTRACT This paper will discuss and demonstrate the advantages of laser beam combining using sin... more ABSTRACT This paper will discuss and demonstrate the advantages of laser beam combining using single mode integrated optics based on TriPleX™ waveguide technology. Color combining through integrated optics yields compact, robust an low cost devices.
[email protected] (3) KPN Royal Dutch Telecom, Netherlands, [email protected] We present t... more [email protected] (3) KPN Royal Dutch Telecom, Netherlands, [email protected] We present the FLAMINGO 1 network architecture, an all-optical wavelength-and-time-slotted Metropolitan Optical Network based on a multiple-ring topology. A couple of important aspects of this architecture include all-optical packet switching at intermediate nodes on a ring and the ability to put IP packets directly over WDM channels. The rings of the network are interconnected with intelligent bridges, architecture of which is presented. The network also enables all-optical multicasting at intermediate nodes, the architecture of which is also presented. Power budget calculations have also been dealt with and discussed in detail.
We have integrated, for the first time, multi-stage cascade and tree spectral amplitude OCDMA en/... more We have integrated, for the first time, multi-stage cascade and tree spectral amplitude OCDMA en/decoders in low loss Si 3 N 4 –SiO 2 . We show improved performance and an excellent match of optical characteristics with design and model.
For a symmetric grating structure with a defect, we show that a fully transmitted defect mode in ... more For a symmetric grating structure with a defect, we show that a fully transmitted defect mode in the band gap can be obtained as a superposition of two steady states: an amplified and an attenuated defect state. Without scanning the whole band gap by transmission calculations, this simplifies the direct calculation of the defect wavelength as the eigenvalue in a non-standard eigenvalue problem.
A ringresonator made of an electro optic (EO) polymer was designed, realized and characterized. T... more A ringresonator made of an electro optic (EO) polymer was designed, realized and characterized. The ring was made of a 4-dimethylamino-4-nitrostilbene (DANS) containing polymer and used in a vertical coupling with the waveguides. The waveguides were made of the photo-definable SU8, preventing an additional etching step in the fabrication process. Measurements were done on a ring of 100 µm radius and TE polarization was used. Thermo optic tuning of 170 pm/°C and EO modulation were measured.
When pulse lengths are shorter than the roundtrip time of a microring resonator filter, interfere... more When pulse lengths are shorter than the roundtrip time of a microring resonator filter, interference effects in the spectral response as shown with cw signals (both through and drop) are not that obvious. In order to clarify the behavior, a number of measurements have been performed on different $SiO_2/Si_3N_4$ microring resonators: a cw measurement, a measurement where the pulse length (1.8 ps) is in the order of the roundtrip time (1.9 ps) and finally a measurement where the pulse length (200 fs) is much shorter than the roundtrip time (4 ps). In all cases the spectral and time domain responses are presented.
IEEE Transactions on Intelligent Transportation Systems - TITS, 2003
This paper addresses the scalability (in terms of the number of nodes) of a packetswitched WDM al... more This paper addresses the scalability (in terms of the number of nodes) of a packetswitched WDM all-optical bi-directional ring for metropolitan area networks. The nodes enable adding/dropping packets to/from all WDM channels on the ring. The nodes are optically transparent to data packets that bypass them. At a linespeed of 2.5 Gbps using directly modulated DFB lasers separated by 400 GHz, EDFAs to compensate for optical power loss and Phasars for wavelength multiplexing/demultiplexing it has been experimentally observed that a single ring can support upto 8 transparent nodes.
Photonic integration of an all-optical packet switch (AOPS) allows a great reduction of volume, p... more Photonic integration of an all-optical packet switch (AOPS) allows a great reduction of volume, power consumption and costs. Recently a 1x4 AOPS was successfully demonstrated by using an all-optical label extractor/eraser. Nonetheless, photonic integration of the AOPS was prevented by the label extractor/eraser integration. Here, we demonstrate a photonic integrated label extractor/eraser for in-band labeling addresses and 160 Gb/s payload by using a silicon micro-ring resonator with passtrough and drop ports. By exploiting the narrow bandwidth of the drop port and passthrough port simultaneous error-free label extraction/erasing has been performed without noticeable pulse distortion.
Applied Physics B-lasers and Optics, 2005
In the last years much effort has been taken to arrive at optical integrated circuits with high c... more In the last years much effort has been taken to arrive at optical integrated circuits with high complexity and advanced functionality. For this aim high index contrast structures are employed that allow for a large number of functional elements within a given chip area: VLSI photonics. It is shown that optical microresonators can be considered as promising basic building blocks for filtering, amplification, modulation, switching and sensing. Active functions can be obtained by monolithic integration or a hybrid approach using materials with thermo-, electro- and opto-optic properties and materials with optical gain. Examples are mainly taken from work at MESA+.
IEEE Transactions on Intelligent Transportation Systems, 2001
By cascading multiple microring resonators an ultra-compact transceiver is proposed in the framew... more By cascading multiple microring resonators an ultra-compact transceiver is proposed in the framework of the European IST project NAIS. Microring resonators have been shown to perform desirable functions like filtering, multiplexing and switching of optical signals. This together with their compact size and the possibility to use wellknown fabrication technologies, make it possible to design a low-cost, multi-wavelength transceiver for the multi-gigabit optical access network. Simulations based on experimentally obtained parameters show that it is possible to cascade large numbers of resonators without significant loss in signal power.
A novel wavelength-selective switch based on thermally tunable Si3N4 microring resonators has bee... more A novel wavelength-selective switch based on thermally tunable Si3N4 microring resonators has been designed, realized and characterized. The switch has an ON/OFF ratio of 7.5 dB and is made out of two thermally tunable microrings which can be tuned over 5 nm.
We present a network architecture of an all-optical wavelength-and-time-slotted Metropolitan Opti... more We present a network architecture of an all-optical wavelength-and-time-slotted Metropolitan Optical Network. A couple of important aspects of this architecture include all-optical packet switching and the ability to put IP packets directly over WDM. Since the FLAMINGO1 network has a ring topology we focus on issues such as chromatic dispersion and network synchronisation and suggest ways and means of dealing
A novel wavelength-selective switch based on thermally tunable Si3N4 microring resonators has bee... more A novel wavelength-selective switch based on thermally tunable Si3N4 microring resonators has been designed, realized and characterized. The switch has an ON/OFF ratio of 7.5 dB and is made out of two rings which allow nearly full dropping (83%) and can thermally be tuned over 3 nm.
IEEE Photonics Technology Letters, 2005
A compact [200 200 m 2 ] wavelength-selective switch based on thermally tunable SiO 2 -Si 3 N 4 m... more A compact [200 200 m 2 ] wavelength-selective switch based on thermally tunable SiO 2 -Si 3 N 4 microring resonators has been designed and realized. The switch supports gigabit filtering applications in access networks. Spectral measurements show an ON-OFF ratio of 12 dB and a channel separation of 20 dB. The 10-Gb/s measurements on a single ring show no degradation of the modulated signal and a theoretical bit-error rate 10 12 .
Uploads
Papers by Douwe Geuzebroek