Exalos Ag

Gebruder Loepfe Ag

Lorenzo Occhi

Christian Velez

Valerio Laino

Christopher Armistead

Lianhe Li

Andrea Fiore

Christian Vélez

Kilian J Germann

Martin M Schwager

Bruno E Weisshaupt

Daniel Rohr

Rico Malacarne

Adrian Schlatter

In accordance with the invention, a display apparatus comprising a light source is provided, said light source comprising at least one superluminescent light emitting diode (SLED), the apparatus further comprising at least one light modulating device arranged in a beam path of a light beam emitted by said light source and operable to emit influenced light upon incidence of said light beam, the light modulating device being operatively connected to an electronic control, the display apparatus further comprising a projection optics arranged in a beam path of said influenced light.

Display apparatus, method and light source

In accordance with the invention, a light source for display and/or illumination is provided, the light source comprising a heterostructure including semiconductor layers, the heterostructure forming a waveguide between a first end and a second end, the heterostructure comprising a plurality of layers and comprising an optically active zone formed by the plurality of layers, the optically active zone capable of emitting light guided by said waveguide, at least two different radiative transitions being excitable in the optically active an electrical current between a p-side electrode and an n-side electrode, transition energies of said at least two different radiative transitions corresponding to wavelengths in the visible part of the optical spectrum, the light source further comprising means for preventing reflections of light from the waveguide by at least one of said first and second end back into the waveguide, thereby causing the light source to comprise a superluminescent light emitting diode.

Light source, and device

In accordance with the invention, a display apparatus including a light source is provided, the light source having at least one superluminescent light emitting diode (SLED), the apparatus further having at least one light modulating device arranged in a beam path of a light beam emitted by the light source and operable to emit influenced light upon incidence of the light beam, the light modulating device being operatively connected to an electronic control, the display apparatus further having a projection optics arranged in a beam path of the influenced light.

An apparatus for producing wavelength stabilized electromagnetic radiation is provided, the apparatus comprising a broadband semiconductor radiation source configured to produce broadband electromagnetic radiation having a mean wavelength &#x3bb;, and a bandpass radiation filter, an input of said bandpass radiation filter being in optical connection to an output of said radiation source, and a common temperature stabilizer being in thermal contact with both, the radiation source and the radiation filter. In a preferred embodiment, the radiation source&#x2014;which is, for example, a superluminescent light emitting diode&#x2014;and the bandpass radiation filter are provided on a common mount which is in contact with a thermoelectric cooler acting, together with temperature sensing means and control means, as temperature stabilizer.

Wavelength stabilized light source

The invention concerns a superluminescent light emitting diode (SLED) comprising a semiconductor heterostructure forming a PN junction and a waveguide. The semiconductor heterostructure includes a gain region with a contact means for biasing the PN junction so as to produce light emission including stimulated emission from an active zone of the gain region, and in the active zone a plurality of quantum dot layers, each quantum dot layer made up of a plurality of quantum dots and a plurality of adjoining layers, each adjoining layer adjacent to one of said quantum dot layers. The material composition or a deposition parameter of at least two adjoining layers is different. This ensures an enhanced emission spectral width.

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Pfaffikon, Switzerland

Lorenzo Occhi