Agrawal, N., Bornholdt, C., Franke, D., Hoffmann, D., Kappe, F.
Electro-absorptive long wavelength (Lambda = 1550 nm) semiconductor modulators with low drive voltage are indispensable components for future high bit-rate communication networks. Recently,...
Reier, F.W., Bornholdt, C., Hoffmann, D., Kappe, F., Morl, L.
In this work we have investigated the MOVPE growth of multi-period InGaAsP/InP quantum confined Stark effect (QCSE) layer structures and provide evidence that the QCSE response can be influenced by...
Hoffman, D., Bornholdt, C., Kappe, F., Morl, L., Sigmund, A.
Summary form only given. We have demonstrated for the first time in a single 1*2 space switch based on absorption and refractive index change induced by the quantum confined Stark effect (QCSE) in...
Novel digital optical switch with crosstalk below -40 dB based on absorptive switching (1995)
Hoffmann, D., Bornholdt, C., Kappe, F., Morl, L.
We report a novel space switch carried out in dilated Benes architecture. The switch makes use of absorption and refractive index change provided in MQW layers and shows an extinction ratio of 40 dB.
High-speed optical 2*2 space switch on InP with travelling wave electrodes (1994)
Kappe, F., Bornholdt, C., Mekonnen, G.G., Ehrke, H. J., Hoffmann, D.
Summary form only given. In conclusion, we have demonstrated for the first time a travelling wave driven balanced bridge modulator switch on InP with a bandwidth exceeding 15 GHz. This could be...
35 GHz bandwidth photonic space switch with travelling wave electrodes on InP (1994)
Kappe, F., Mekonnen, G.G., Bornholdt, C., Reier, F.W., Hoffman, D.
A 2*2 Mach-Zehnder interferometer based switch with a large optical bandwidth of 35 GHz is reported. The design and the characteristics of switches with travelling wave electrodes are discussed. The...
Meander-type wavelength demultiplexer with weighted coupling (1992)
Venghaus, H., Bornholdt, C., Kappe, F., Weinert, C.M.
An experimental and theoretical investigation of meander-type wavelength demultiplexers with weighted coupling is reported. Numerical simulations have been performed combining a two-dimensional...
Integrated wavelength demultiplexer-receiver on InP (1992)
Bornholdt, C., Trommer, D., Unterborsch, G., Bach, H.G., Kappe, F., Passenberg, W., ...
A detector stage comprising a photodiode, a field-effect transistor, and a load resistor, and a wavelength demultiplexer have been monolithically integrated in the GaInAsP/InP material system. Chips...
Aspects of a modern multi-media information system / (1991)
Thesis (doctoral)-Technische Universität Graz, 1991.
Meander coupler: A novel structure for WDM-applications (1990)
Kappe, F., Bornholdt, C., Reier, F., Stenzel, R., Venghaus, H., ...
The authors have realized a novel filter in GaInAsP/InP, which is a codirectional asymmetric coupler with periodic variation of the coupling constant. The transmission exhibits a sinc2-dependence,...
WDM components on the basis of InGaAsP/InP directional couplers (1990)
Bornholdt, C., Kappe, F., Nolting, H.P., Stenzel, R., Venghaus, H., Weinert, C.M.
The paper describes the production of two wavelength-selective multiplexer/demultiplexer ( lambda -muldex) components intended to become parts of an integrated optical convertor for a bidirectional...
Meander coupler, a novel wavelength division multiplexer/demultiplexer (1990)
Bornholdt, C., Kappe, F., Muller, R., Reier, F., Stenzel, R., ...
The authors have realized a novel wavelength division multiplexer/demultiplexer based on rib waveguides in GaInAsP/InP. The device is a strongly asymmetric codirectional coupler with periodic...
Picture Interchange Coding (PIC) - Functional Specification and Encoding of Profile '2D' (1989)
This documentation contains detailed specification of the Picture Interchange Coding (PIC) file format. PIC is a flexible format suitable for the encoding of graphical and related data. The PIC data...