J Jiri Stulemeijer

Compact photonic integrated phase and amplitude controller for phased-array antennas

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.

InP-based spotsize converter for integration with switching devices

We have designed and fabricated an InGaAsP-InP based spotsize converter (SSC), which is compatible with the waveguide structure used in monolithic integrated ADMs and OXCs. In a first experiment, a total coupling loss to a cleaved fiber of 4.2 dB for TE and 3.9 dB for TM was realized with a 1.5 mm-long SSC. The 1-dB alignment tolerances improved from 0.75 /spl mu/m to 2.4 and 2.2 /spl mu/m for the horizontal and vertical direction, respectively.

Photonic chip for steering a four element phased array antenna

A polarization independent photonic integrated circuit for phase steering of a four element phased array antenna has been fabricated on InP. The chip is extremely small and suitable for packaging.

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.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/spl times/8 mm) integrated beam-forming network for controlling phase and amplitude of an 16-element RF phased-array antenna.