Siemens Aktiengesellschaft

Gustav Mueller

Lothar Stoll

Bruno Acklin

Ulrich Wolff

Meinrad Schienle

Engelbert Hartl

Martin Honsberg

Bernd Sauer

Matthias Heinbach

An arrangement is composed of at least two waveguides, which are coaxially optically coupled to one another integrated on the surface of the substrate with different degrees of wave guidance. The axis of the more weakly-guiding waveguide is straight and the axis of the more strongly-guiding waveguide comprises a curved section.

Arrangement of two integrated optical waveguides on the surface of a

An integrated optical arrangement operated as a switch composed of at least three ridge waveguides on a substrate, the third ridge waveguide is utilized for an infeed of an optical waveguide proceeding between two parallel ridge waveguides forming the first and second waveguides having either a contacted pn-junction or a contacted pin-junction. As a result of asymmetrical switching of the junctions, the optical wave is coupled over into one or the other of the first and second waveguides. The advantage over traditional directional coupler switch structures are complete symmetry of the two switch conditions, 'digital switching behavior', enhanced separation of the output waveguide, low switching losses and greater manufacturing tolerances, reduced polarization sensitivity and increased optical bandwidth.

Integrated optical arrangement of ridge waveguides on a substrate

An apparatus for converting an optical wave having a relatively smaller cross section into an optical wave having a relatively larger cross section which may be manufactured in a monolithically integrated fashion in a simple way. In this apparatus, a wave-guiding, rib-shaped taper having an end for coupling the optical wave with a small cross section into the taper is fashioned on a rib of a rib waveguide which guides the optical wave. An optical wave having a larger cross section is fashioned thereon in a longitudinal direction of the rib. The infeed end of the taper and the taper itself has a smaller breadth in comparison to the breadth of the rib of the rib waveguide. Proceeding from this end, the taper broadens and decreasingly tapers in thickness in the longitudinal direction of the rib waveguide.

Apparatus for increasing the cross section of optical waves

An integrated optical directional coupler is formed of two strip waveguides integrated on a substrate. A strip waveguide section in a coupling section of the directional coupler is designed as a controllable strip waveguide. The strip waveguides outside of this section are passive strip waveguides. In order to guarantee a largely polarization-dependent function of this coupler and of an optical switch realized therewith, the passive waveguides comprise a defined, different strip waveguide structure than the controllable strip waveguide.

Controllable integrated optical directional coupler

An arrangement for converting an optical wave having a small spot width into an optical wave having a larger spot width comprises a first integrated optical waveguide to which a semiconductor component may be coupled and is embedded in a second, larger optical waveguide to which a monomode fiber is to be coupled. The first optical waveguide preferably tapers as it extends into the second waveguide and ends at a distance from the end face of the second waveguide so that a first optical wave in the first waveguide will spread as a consequence of the first optical waveguide becoming thinner until the wave guidance is assumed by the second waveguide. The coupler enables coupling monomode fibers to optical semiconductor components without requiring microlenses for matching the various modes.

Arrangement for converting an optical wave having a small spot width

An integrated-optical interferometer is formed of two strip waveguides integrated on a substrate. A strip waveguide section of the interferometer is designed as a controllable strip waveguide, and the strip waveguides are passive strip waveguides outside of the section. In order to guarantee a largely polarization-dependent function of this interferometer and of an optical switch realized therewith, the passive waveguides comprise a defined, different strip waveguide structure than the controllable strip waveguide.

Controllable integrated optical Mach-Zehnder interferometer

An integrated optical arrangement having at least one optical waveguide integrated a substrate of semiconductor material, characterized by the waveguide being a rib waveguide comprising the p-doped material disposed on a substrate which contains a waveguiding layer which is either an n-doped or an undoped material, said arrangement having either a pn or a pin junction between the p-doped material of the rib and the n-doped or undoped material of the waveguiding layer. In addition, a method for forming the various layer is disclosed.

Integrated optical arrangement having at least one optical waveguide

A laser diode is provided having a strip-shaped web based on the principle of a metal clad ridge waveguide laser diode with a strip-shaped web width of less than 10 .mu.m. At least one lateral web extends laterally of the strip-shaped web and serves as a carrier for an electrical connection between the metal cladding of the strip-shaped web and a contacting surface for an electrical lead.

Growing community of inventors

Munich, Germany

Gustav Mueller