Optoelectrical chip
AssigneeFos4X GmbH
InventorMarkus Schmid
Life of this patent
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Abstract
The invention relates to an optoelectronic chip comprising the following elements: a light inlet; a wavelength-sensitive optical filter; a first photoelectric element for measuring a first light intensity, particularly a first photodiode, the first photoelectric element being arranged such that light penetrating the optoelectronic chip via the light inlet, transmitted by the filter, hits the first photoelectric element; and a second photoelectric element for measuring a second light intensity, particularly a second photodiode, the second photoelectric element being arranged such that the light penetrating the optoelectronic chip via the light inlet, which is reflected by the filter, hits the second photoelectric element.
Claims11
A measurement system including:
- an optoelectrical chip comprising:
- a light inlet opening,
- a wavelength-sensitive optical filter,
- a first photoelectric element for measuring a first light intensity, the first photoelectric element being arranged such that light entering into the optoelectrical chip via the light inlet opening, which is transmitted by the optical filter, hits the first photoelectric element, and
- a second photoelectric element for measuring a second light intensity, the second photoelectric element being arranged such that light entering into the optoelectrical chip via the light inlet opening, which is reflected at the optical filter, hits the second photoelectric element;
- and
- an optical waveguide coupled to the light inlet opening, wherein the optical waveguide comprises at least one fiber Bragg grating,
- wherein a reflection surface of the optical filter is inclined at an angle relative to a propagation direction of the light entering into the optoelectrical chip via the light inlet opening, and wherein the angle is between 50 degrees and 80 degrees.
A method for evaluating a reflection spectrum of a fiber Bragg grating, wherein the fiber Bragg grating is provided in an optical waveguide, and wherein an end of the optical waveguide is optically coupled to a light inlet opening of an optoelectrical chip,
- the optoelectrical chip comprising:
- a light inlet opening,
- a wavelength-sensitive optical filter,
- a first photoelectric element for measuring a first light intensity, the first photoelectric element being arranged such that light entering into the optoelectrical chip via the light inlet opening, which is transmitted by the optical filter, hits the first photoelectric element, and
- a second photoelectric element for measuring a second light intensity, the second photoelectric element being arranged such that light entering into the optoelectrical chip via the light inlet opening, which is reflected at the optical filter, hits the second photoelectric element, wherein a reflection surface of the optical filter is inclined at an angle relative to a propagation direction of the light entering into the optoelectrical chip via the light inlet opening, and wherein the angle is between 50 degrees and 80 degrees, and
- the method comprising:
- measuring a transmission intensity of the light having entered via the light inlet opening and having passed the optical filter, by means of the first photoelectric element;
- measuring a reflection intensity of the light having entered via the light inlet opening and having been reflected at the optical filter, by means of the second photoelectric element;
- dividing the transmission intensity by the reflection intensity to obtain a ratio value;
- and
- relating the ratio value to a model of the optical filter to obtain a value associated with the reflection spectrum.
Dependencies are inferred from the claim text.