Semiconductor optical devices
AssigneeUniversity College Cardiff Consultants Limited
InventorHuw Summers
Life of this patent
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Abstract
A semiconductor optical device (e.g. a resonant cavity device in this form of an LED or a laser) comprises a single substrate arranged for emitting light (O) for incidence on a sample or other element and also responsive to light (D), e.g. of a different wavelenght, received back from this sample or other element: the device further comprises means for monitoring a characteristic (e.g. its current-voltage characteristic) which varies in dependence upon the light (D) received back from the sample or other element.
Claims25
1) A semiconductor emitter/detector optical device comprising a single substrate arranged for emitting light for incidence on a sample or other element and also responsive to light received from said sample or other element, the device further comprising means for monitoring a characteristic of the device which varies in dependence upon said light received from said sample or other element.
11) A device as claimed in clam 1, comprising a resonant cavity light emitting device, a reflector thereof, through which light is emitted, comprising a plurality of alternating layers of high and low refractive index material, a layer of absorbing material being incorporated into or associated with said reflector, said absorbing layer serving to absorb light of a wavelength different from the light emitted by the device.
19) A device for the analysis or testing of a biological or other sample, the device comprising a single light emitter for directing light onto said sample, and a single photodetector for receiving light from said sample.
Dependencies are inferred from the claim text.