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.
a.m.j.koonen@tue.nl (3) KPN Royal Dutch Telecom, Netherlands, a.c.vanbochove@kpn.com We present t... more a.m.j.koonen@tue.nl (3) KPN Royal Dutch Telecom, Netherlands, a.c.vanbochove@kpn.com 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.
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.
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+.
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.
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.
a.m.j.koonen@tue.nl (3) KPN Royal Dutch Telecom, Netherlands, a.c.vanbochove@kpn.com We present t... more a.m.j.koonen@tue.nl (3) KPN Royal Dutch Telecom, Netherlands, a.c.vanbochove@kpn.com 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.
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.
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+.
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.
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Papers by Douwe Geuzebroek