T. Mitze

Performance of 40-Gb/s DPSK Demodulator in SOI-Technology

A silicon-on-insulator delay interferometer manufactured in 4-mum rib waveguide technology is presented. The polarization-dependent frequency shift is tuned to a value as low as 0.4 GHz. Continuous-wave device performance and polarization-independent differential phase-shift keying demodulation performance in a 40-Gb/s testbed are demonstrated.

Hybrid integrated 40 Gb/s DPSK receiver on SOI

A DPSK receiver using a flip-chip hybrid of InP photodetectors on SOI boards with waveguide delay line interferometer and SOA preamplifier on SOI boards are developed. The horizontal waveguide integration enables bandwidths exceeding 40 GHz.

CWDM Transmitter Module Based on Hybrid Integration

A simple concept for hybrid integration and packaging of III/V active devices in a multipurpose optical platform is introduced. The board could be used as a coarse wavelength-division multiplexing transmitter with four lasers or as a receiver with photodiodes, respectively. The assembly ensures ample heat dissipation, so the laser performance does not suffer after the packaging

Facet preparation of SOI waveguides by etching and cleaving compared to dicing and polishing

We compared two different techniques of facet preparation of silicon-on-insulator (SOI) waveguides: The conventional by dicing and polishing and our proposed by dry etching the facets and cleaving along anisotropically etched cleaving grooves.

Mach-Zehnder interferometer (MZI) with more than 20 dB extinction ratio on silicon-on-insulator

We have fabricated an MZI with more than 20 dB extinction ratio on SOI serving for the high demands of differential phase shift keying (DPSK) receivers with the capability of fast thermo-optic tuneability.

SOI platform for high speed all optical wavelength conversion

In this paper we present new design of an all-optical wavelength converter (AOWC) based on silicon- on-insulator platform. For that purpose we combine nonlinearities of semiconductor optical amplifiers (SOA) with high finesse Mach-Zehnder filters, available in SOI- technology.

Hybrid flip-chip integration of a 40 Gb/s DPSK receiver comprising a balanced photodetector on a DLI-SOI board

A DPSK receiver concept using flipchip hybrid integration of InP photodetectors on SOI boards with optical decoder is presented. Horizontal waveguiding enables low-cost production for high data rates.

Low Loss Star Coupler Concept for AWGs in Rib Waveguide Technology

We introduce a new concept for a tapered transition between waveguides and a free propagation region (FPR) for rib waveguide technology. The optical field is pressed downwards to the lower part of the guiding layer by tapering off the waveguide. The subsequent FPR is also etched down to the lower part of the guiding layer, which results in an adiabatic transition from the waveguide to the slab. Arrayed waveguide gratings, designed with this technique, were fabricated in silicon-on-insulator and showed a reduction in insertion loss of about 2.5 dB

A new and simple concept for self-aligned hybrid integration in silicon on insulator (SOI)

A concept for a SOI motherboard is introduced. AuSn solder technology is used for hybrid integration. The device adjustment on the board is realised by passive self-alignment. First results on fabricated boards are very encouraging.

An Optical Board Approach Based on SOI (silicon-on-insulator)

An optical board technology consisting of SOI (silicon-on-insulator) based rib-waveguides and hybrid integration of active III/V components is presented. The use of SOI as the material base for an optical motherboard offers specific advantages, such as well know processing using standard equipment for board fabrication. Examples for the application of our board and waveguide technology are given. The board technology is introduced by presenting an optical transmitter for C-WDM transmission. It consists of four discrete lasers, which are multiplexed using an arrayed waveguide grating (AWG). The waveguide technology is presented by discussing an DPSK-receiver chip, combining advanced waveguide technology with a very well controlled birefringence of the component.