Patent ID: 8081671

Claim:
An optoelectronic device comprising: a substrate, a vertical cavity surface emitting laser (VCSEL) formed on the substrate, the VCSEL comprising an active layer sandwiched between an output side Bragg mirror and a non-output side Bragg mirror and such that the intensity of light emitted through the output side Bragg mirror is greater than that emitted through the non-output side Bragg mirror, a light receptive device to receive and detect light emitted through the non-output side mirror of the VCSEL, and a light deflector is interposed between the light receptive device and the non-output side mirror of the VCSEL, the light deflector being effective to deflect light emitted through non-output side Bragg mirror to reduce the amount of light received by the light receptive device having a propagation direction with an inclination to an axis of the laser cavity of the VCSEL, wherein the light deflector comprises at least one of a curved surface structure formed between the non-output side Bragg mirror and the light receptive device, the curved surface structure defining a transition in the index of refraction, an optically concave multifaceted structure, and an angle selective coating layer wherein light propagating in a narrow angle region around a cavity axis of the VCSEL passes through the light deflector, and off-axis light is deflected at the light deflector.