Shipley Company LLC

National Research Council of Canada

Hui Luo

Mindaugas Fernand Dautartas

Dan A Steinberg

David W Sherrer

Neal Ricks

Dayan Ban

Hui Chun Liu

The present invention concerns a design for an external cavity single mode laser wherein a short optical path length for the optical cavity (e.g., &#x2dc;3 to 25 mm) provides sufficient spacing of the longitudinal modes allowing a single wavelength selective element, such as a microfabricated etalon, to provide a single mode of operation, and optionally a selectable mode of operation.

External cavity semi-conductor laser and method for fabrication thereof

An optical device is disclosed which includes a single-mode waveguide () which supports a first optical mode in a first region and a second optical mode in a second region. The waveguide includes a guiding layer () having at least one wing () extended outwardly from the guiding layer (). The guiding layer (703) may desirably have a rib waveguide () cross sectional shape at the wings. The wings () decrease in width along the length of the guiding layer to convert a rib waveguide mode at the wings to a channel waveguide mode.

Optical waveguide termination with vertical and horizontal mode shaping

A wavelength conversion device includes a photodetector for generating a photocurrent in response to the detection of radiation at a first wavelength. An avalanche multiplier amplifies the signal photocurrent and feeds this to a light emitting element that produces radiation at a second wavelength shorter than the first wavelength and corresponding to the detected radiation at the first wavelength. The components are assembled together in an integrated stacked arrangement either by epitaxial growth or wafer fusion of the individual components. The device is useful as an image intensifier or thermal imaging device.

Wavelength conversion device with avalanche multiplier

A variable width waveguide useful for mode matching between dissimilar optical waveguides and optical fibers and a method for making the same is described. In one embodiment, a tapered waveguide is etched in a substrate, a cladding material is laid over the upper surface of the substrate and within the waveguide, and the waveguide is then filled with a core material. The core material may be deposited in a single step, or in successive deposition steps.

Variable width waveguide for mode-matching and method for making

An optical device is disclosed which includes a waveguide that support a first optical mode in a first region and a second optical mode in a second region. The waveguide further includes single material guiding layer having a lower portion with a first taper and an upper portion with a second taper.

An optical subassembly which positions an optical device is described. The optical device is mounted on a plurality of spheres or columns placed in predetermined positions in an upper surface of a substrate. The predetermined positions include pits formed in the upper surface of the substrate. The spheres may be the same size or may be of varying sizes. Pits or grooves also may be formed in the optical device. The optical device may be formed with flexure positions to assist in holding it in place on the spheres. Further, the optical device, spheres and substrate may be metallized or formed of metal and the surface tension forces of solder may be utilized to position the optical device.

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Markham, Canada

Hui Luo