INTEGRATED SEMICONDUCTOR DIODE LASER AND PHOTODIODE STRUCTURE

INTEGRATED SEMICONDUCTOR DIODE LASER AND PHOTODIODE STRUCTURE

Integrated semiconductor structure with optically coupled laser diode (11) and photodiode (12A), both devices having etched, vertical facets (16A, 21). The photodiode has a spatially non-uniform sensitivity profile with respect to the incident light beam (18A) emitted by the laser. This is due to th...

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Bibliographische Detailangaben
Hauptverfasser: BUCHMANN, PETER L, HARDER, CHRISTOPH S, VOGELI, OTTO
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
DEVICES USING STIMULATED EMISSION
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
SEMICONDUCTOR DEVICES
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Zusammenfassung:Integrated semiconductor structure with optically coupled laser diode (11) and photodiode (12A), both devices having etched, vertical facets (16A, 21). The photodiode has a spatially non-uniform sensitivity profile with respect to the incident light beam (18A) emitted by the laser. This is due to the varying distance from the laser facet and/or to variations in the angle of incidence and results in photocurrents produced by the photodiode that depend on the intensity distribution of the light beam. The spatially non-uniform sensitivity profile allows the measurement of the far-field intensity distribution of the laser and thus on-wafer screening of lasers with respect to their mode-stability.