Abstract:
A photonic processing module (100) comprises a high index-contrast waveguide device comprising a substrate (102), a first layer (104) disposed on the substrate having a first refractive index, and a relatively thin second layer (106) disposed on the first layer. The second layer has a second refractive index providing a high index-contrast with the first layer, and the device includes at least one thin-ridge waveguide element (108) formed in the second layer which supports a guided mode in a longitudinal direction. An optical input port (110) is configured to direct an input beam into a slab mode of the second layer, the beam being directed to propagate at a predetermined angle θ to the longitudinal direction of the thin-ridge waveguide element. The angle θ is associated with a resonant coupling between the slab mode of the second layer and the guided mode of the thin-ridge waveguide element. An output beam is thus generated when the input beam includes one or more optical components corresponding with the resonant coupling. An optical output port (112) is configured to receive the output beam.
Abstract:
Die Erfindung bezieht sich u. a. auf einen Injektionsmodulator (10) zur Modulation optischer Strahlung (P) mit einem optischen Wellenleiter (20) und einer Diodenstruktur (30), die zumindest zwei p-dotierte Halbleiterabschnitte (110), zumindest zwei n-dotierte Halbleiterabschnitte (210) und mindestens einen schwach oder undotierten Zwischenabschnitt (300) zwischen den p-dotierten und n-dotierten Halbleiterabschnitten (110, 210) aufweist, wobei die p-dotierten Halbleiterabschnitte (110) - in Längsrichtung (L) des Wellenleiters (20) gesehen - gegenüber den n-dotierten Halbleiterabschnitten (210) versetzt angeordnet sind und die Diodenstruktur (30) in einem resonanzfreien Abschnitt des Wellenleiters (20) angeordnet ist, in dem - von Wellenleiterdämpfung abgesehen - die Strahlungsintensität der im Wellenleiter (20) geführten Strahlung (P) konstant ist. Erfindungsgemäß ist vorgesehen, dass die p-dotierten Halbleiterabschnitte (110) auf einer Seite des Wellenleiters (20) - in Längsrichtung (L) des Wellenleiters (20) gesehen und bezogen auf die Wellenleitermitte - liegen, die n-dotierten Halbleiterabschnitte (210) auf der anderen Seite des Wellenleiters (20) liegen und der Zwischenabschnitt (300) im Bereich der Wellenleitermitte liegt, sich die Halbleiterabschnitte (110, 210) jeweils quer zur Wellenleiterlängsrichtung (L) in Richtung der Wellenleitermitte des Wellenleiters (20) erstrecken und die p-dotierten Halbleiterabschnitte (110) - in Längsrichtung (L) des Wellenleiters (20) betrachtet - jeweils mit den n-dotierten Halbleiterabschnitten (210) überlappungsfrei sind.
Abstract:
Novel methods and systems for waveguide fabrication and design are disclosed. Designs are described for fabricating ridge, buried and hybrid waveguides by a femtosecond pulsed laser. A laser system may combine a diode bar, a wavelength combiner and a waveguide. The waveguide may convert the electromagnetic radiation of an infrared laser into that the visible-wavelength range.
Abstract:
An optical device includes a light-transmitting medium positioned on a base The light-transmitting medium includes a slab region and a ndge extending upward from the slab region The πdge defines a portion of an optical waveguide on the device A modulator is also positioned on the base The modulator includes a first doped region of the light-transmitting medium and a second doped region of the light-transmitting medium The first doped region and the second doped region are configured such that a depletion region forms in the waveguide when an electrical bias is not applied to the modulator At least a portion of the first doped region is positioned in the ridge and at least a portion of the second doped region is positioned in the slab region The light-transmitting medium includes a first electrical pathway extending from a first location to the first doped region.
Abstract:
A non-linear optical device (100) comprises a frequency-conversion waveguide and first (102) and second (104) input waveguides. The longitudinal axes of the input waveguides are inclined to that of the frequency-conversion waveguide such a first transverse mode is excited in the latter at the input frequency in operation of the device. The frequency-conversion waveguide supports a second transverse mode at an output frequency of the device, such that the phase velocity of the second transverse mode at the output frequency is substantially equal to that of the first transverse mode at the input frequency, thus providing phase-matching by balancing the effects of chromatic and modal dispersion. The invention provides phase-matching for frequency-conversion within a waveguide where birefringent phase-matching is not possible, for example where the waveguide is a semiconductor waveguide.
Abstract:
An optical waveguide having a core region with a substantially rectangular cross-section with a selected aspect ratio of width to height. Embodiments include devices incorporating the optical waveguide and methods for using the optical waveguide.
Abstract:
An optical waveguide having a core region with a substantially rectangular cross-section with a selected aspect ratio of width to height. Embodiments include devices incorporating the optical waveguide and methods for using the optical waveguide.