Wavelength sensitive device for wavelength stabilization
First Claim
1. A device for stabilizing the wavelength of an optical radiation in a component having a nominal operating wavelength by means of a wavelength influencing circuit adapted to be driven by a control signal, wherein said device comprises a semiconductor photodiode adapted to be impinged upon by said radiation to generate an output signal which is indicative of a difference of the wavelength of said radiation with respect to said nominal wavelength, wherein said semiconductor photodiode includes a plurality of layers jointly defining two diodes generating opposite photocurrents as a result of said radiation impinging onto said photodiode, said opposite photocurrents being adapted to generate said control signal.
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Abstract
A device for stabilizing the operating wavelength (λ) of an electro-optical component having a nominal operating wavelength (λ0) by a wavelength influencing circuit adapted to be driven by a control signal. The device comprises a semiconductor photodiode adapted to be impinged upon by the radiation generated and/or processed by the component and to generate an output signal which is indicative of a difference of the wavelength of the radiation ((λ) with respect to the nominal operating wavelength (λ0, λi). The semiconductor photodiode includes a plurality of layers jointly defining two opposite diodes generating opposite photocurrents as a result of radiation impinging onto the photodiode. The opposite photocurrents are adapted to generate the control signal to effect the stabilization action.
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19 Claims
- 1. A device for stabilizing the wavelength of an optical radiation in a component having a nominal operating wavelength by means of a wavelength influencing circuit adapted to be driven by a control signal, wherein said device comprises a semiconductor photodiode adapted to be impinged upon by said radiation to generate an output signal which is indicative of a difference of the wavelength of said radiation with respect to said nominal wavelength, wherein said semiconductor photodiode includes a plurality of layers jointly defining two diodes generating opposite photocurrents as a result of said radiation impinging onto said photodiode, said opposite photocurrents being adapted to generate said control signal.
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