Abstract: The present invention relates to a vertical cavity surface emitting laser device comprising a VCSEL with a monolithically integrated photodiode. The photodiode (2) is formed of a layer sequence of a first n-doped region (6), a p-doped region (7), an intrinsic region (8) and a second n-doped region (9) of a semiconductor material. The photodiode (2) and the laser share a common electrode, which is realized as an Ohmic n-contact (10) at said first n-doped region (6). The proposed device allows less complex manufacturing, resulting in lower manufacturing costs.

Abstract: The present invention relates to a semiconductor laser for use in an optical module for measuring distances and/or movements, using the self-mixing effect. The semiconductor laser comprises a layer structure including an active region (3) embedded between two layer sequences (1, 2) and further comprises a photodetector arranged to measure an intensity of an optical field resonating in said laser. The photodetector is a phototransistor composed of an emitter layer (e), a collector layer (c) and a base layer (b), each of which being a bulk layer and forming part of one of said layer sequences (1, 2). With the proposed semiconductor laser an optical module based on this laser can be manufactured more easily, at lower costs and in a smaller size than known modules.

Abstract: A diagnostic and prescriptive system and method for management of a combined optical and RF cable plant system. In an exemplary embodiment the method and system uses optical receivers in a hub or headend to determine a variety of cable plant parameters such as the OMI of the received signal and automatically facilitated prescriptive service through prioritization and automatic recalibration. In another exemplary embodiment the method allows doing such signal OMI measurements in a closed loop system (that is a fully operational system). In addition, a further exemplary method and system allows storing of standard receiver calibration information such that from thereon signal OMI measurements that can be performed without signal interruption.

Abstract: The invention relates to an optical sensor module (1) for a measuring device. Said module comprises at least one optical sensor (2) including a diode laser (3) having a laser cavity for generating a measuring beam, the diode laser being attached to a substrate (12), converging means (5) (such as a lens). During measuring, such converging means (5) converges the measuring beam in an action plane and converges in the laser cavity the measuring beam radiation that has been back-scattered by an object to generate a self-mixing effect and means for measuring the self-mixing effect. Later means comprise a photo diode (4) and an associated signal processing circuitry. According to an essential aspect of the invention, that the diode laser (3) is configured to emit laser radiation of a wavelength for which the substrate (12) being attached to the diode laser (3) is transparent. This configuration leads to an essentially simple (and therefore cheap) sensor module.

Abstract: A controller (7) is disclosed for controlling the power supply to a laser (3) that is used in determining the motion of an object (8). The controller comprises a power source (2) that is arranged to supply power pulses (10, 11) to the laser (3) in response to a controller signal. The controller (7) controls the generation of pulses to those periods in which a reliable result can be obtained, by detecting the laser radiation that has interacted with pulses reflected from the object (8), in order to conserve power consumption. Further the power pulses (10, 11) comprise a heating component (9), which serves to stabilize the temperature of the laser (3) and therefore calibrate the laser (3) so that a known lasing wavelength is generated.

Abstract: Method and system for an optical package are disclosed. In one embodiment of the present invention, an optical package comprises: a lead frame; a substrate mounted inside the lead frame; one or more leads attached to the substrate; an optical device or component such as a LOA chip mounted on top of the substrate; a window cap hermetically sealing the optical device or component; one or more lens attached to either side of the window cap; two fibers attached on either side of the window cap; two holes or vias that may serve as inputs into the window cap or outputs from the window cap; an electrical out extending from the window cap; and an electrically isolated enclosure enveloping all contents inside the lead frame.