Polarization independent InGaAs/lnP chopped quantum well interferometric space switch at 1.55 mum

A Mach-Zehnder Interferometric (MZI) space switch using a novel CRE grown InGaAs/InP chopped quantum well (CQW) phase section is presented. Each CQW consists of three 3IA. InGaAs strained quantum wells separated by 12A InP barriers. This structure shows a shift of the absorption edge as high as 80nm at lOV reverse bias. The heavy hole and light hole subbands cross at approximately 0.6% tensile strain. Using these chopped quantum wells, we realized MZ/'s with low attenuation and a V2.l product as low as 3.6 V2.cm. Finally, we realized full polarisation independent switching using 0.75% tensile strained CQW's

InP-based Integrated MZI Switches for Optical Communication

Applied Science

Crosstalk reduction in dilated MZI-based switches on InP by stray light removal

Dilated space switches on InP have a crosstalk level of about -28 dB, which is too low for application in large WDM networks. In this contribution the influence of stray light in the wafer on the crosstalk level of the dilated swicht is investigated. By placing titanium absorbers at both sides of the waveguiding structure of the switch, the stray light is removed from teh wafer, resulting in a crosstalk reduction of 3 dB in ths type of switch. In switches with lover crosstalk levels the reduction is even larger (6 dB

Crosstalk performance of integrated optical cross-connects

Crosstalk performance of monolithically integrated multiwavelength optical cross-connects (OXC's) depends strongly on their architecture. In this paper, a semiquantitative analysis of crosstalk in 11 different architectures is presented. Two architectures are analyzed numerically in more detail and the results of the analysis show good agreement with previously reported experimental result

Coherent Photonic Integrated Beamformer for Phased-Array Antennas

The feasibility of an extremely compact Photonic Integrated Circuit for controlling phase and amplitude of a 16-element phased-array microwave antenna has been demonstrated experimentall

Photonic Integrated Beamformer for Phased-Array Antennas

Feasibility of an extremely compact Photonic Integrated Circuit for controlling phas

Photonic integrated beamformer for a phased array antenna

Feasibility of an extremely compact photonic integrated circuit for controlling phase and amplitude of a 16-element phased-array microwave antenna has been demonstrated experimentally. We report first experiments on an extremely compact (8.5*8 mm) integrated beam-forming network for controlling phase and amplitude of an 16-element RF phased-array antenn

Dilated polarization independent WDM cross-connect on InP

A four wavelength 2*2 optical WDM-cross-connect with dilated switches is reported. The device is monolithically integrated on InP and consists of two 8-channel PHASARs combined with 16 electrooptic Mach-Zehnder interferometer switches. On-chip loss is less than -17 dB and crosstalk is better than -20 d