Oclaro Technology Limited

Avalon Photonics Ltd.

Avalon Photonics Ag

Michael Moser

Andrew Cannon Carter

Guilhem Almuneau

Sven Eitel

Fabrice Monti Di Sopra

Wolfgang Kaiser

A vertical cavity surface emitting laser (VCSEL) () has a substrate (), on which are disposed first and second distributed Bragg reflectors (DBRs) (), each DBR comprising a stack of layers of alternating refractive index, an active layer () disposed between the DBRs, and an aperture layer () disposed either between the DBRs or within one of the DBRs. The aperture layer () has a border () having an internal boundary with a plurality of indented portions defining one or more apertures. Such a VCSEL is easily manufacturable and provides a narrow bandwidth output, as well as mitigating at least some of the problems of prior art VCSELs. Mesa () may be etched to be non-circular and subsequent selective oxidation of aperture layer () results in a non-circular current confinement aperture () promoting higher-order lateral modes (LP).

VCSEL with non-circular mesa and current confinement aperture for higher order lateral mode emission

The invention provides an optoelectronic device combining a vertical cavity surface emitting laser (VCSEL) and a photodetector for monitoring the output power of the vertical cavity surface emitting laser. To improve the signal-to-noise ratio of the photodetector, a light deflector is interposed between the photodetector and the VCSEL.

Optoelectronic device and method of operating optoelectronic device

A method is disclosed in which the principle of phase-coupling is used to stabilize the polarization of laser radiation emitted by a plurality of phase-coupled vertical cavity surface emitting laser elements. Due to a suitable coupling strength between adjacent VCSEL elements, the probability of polarization flips of VCSEL devices operated in the single mode region is zero or at least drastically reduced. Moreover, a VCSEL device is disclosed, comprising a polarization adjusting means for controlling the polarization direction of an arrangement of a plurality of phase-coupled VCSEL elements, wherein the polarization direction of each VCSEL element is substantially kept constant.

Polarization-stable vertical cavity surface emitting laser device and a method of stabilizing the polarization of a vertical cavity surface emitting laser device

A vertical-cavity surface-emitting laser comprises one or more quantum well layers and one or more barrier layers to define an gain region, a first mirror means and a second mirror means, wherein the first and second mirror means define a resonator. Moreover, the vertical-cavity surface-emitting laser further comprises a first indium phosphide layer adjacent to the gain region and a second indium phosphide layer adjacent to the gain region to define a laser cavity.

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Baden, Switzerland

Michael Moser