Abstract: An optical sensor arrangement for measuring an observable, the arrangement including an optical resonance circuit including at least a first and a second optical resonator, each of the optical resonators including an entry port for coupling light into the optical resonator and a drop port for decoupling light from the optical resonator. The first and second resonator are configured such that only a portion of the first and second resonator detects the presence of the observable, a size of the portion of the first resonator being different from a size of the portion of the second resonator. The optical resonance circuit further configured to be coupled to a light generation circuit and to a detector unit for detecting light.

Abstract: An optical sensor arrangement for measuring an observable including at least one light source for generating a first light component of a first frequency including a first mode and a second light component of a second frequency including a second mode orthogonal to the first mode, an optical resonator having differing optical lengths for the first and second modes, at least one of the optical lengths being variable depending on the observable and a dependence of the respective optical length being different for the first and second modes, and a detector unit coupled to the optical resonator for coupling out the two light components and being configured for detecting a frequency difference between a resonance frequency of the optical resonator for the first mode and a resonance frequency of the optical resonator for the second mode.

Abstract: An optical sensor arrangement for measuring an observable, the arrangement including an optical resonance circuit including at least a first and a second optical resonator, each of the optical resonators including an entry port for coupling light into the optical resonator and a drop port for decoupling light from the optical resonator. The first and second resonator are configured such that only a portion of the first and second resonator detects the presence of the observable, a size of the portion of the first resonator being different from a size of the portion of the second resonator. The optical resonance circuit further configured to be coupled to a light generation circuit and to a detector unit for detecting light.

Abstract: The present disclosure relates to an example method and optical sensor for detecting molecules of a particular substance by means of an optical sensor. Such an example method may include bringing the sensor into contact with a fluid to be analyzed, coupling light of a first wavelength into an optical resonator of the optical sensor, coupling light of a second wavelength into the same resonator or into a second optical resonator of the optical sensor, detecting, for each of the first and the second wavelengths, an optical signal coupled out of an optical path containing the respective resonator, varying an optical length of the respective resonator or the respective wavelength and detecting a broadening of this resonance indicating an absorption of the light fed into the respective resonator by molecules accumulated at the active layer of this resonator.

Abstract: A sensor arrangement including a light source, a first optical element, a second optical element, a first photo detector, and a second photo detector. The light source is optically coupled to the first optical element that is optically coupled to the second optical element. The first photo detector is optically coupled to the first optical element for detecting a first component of the part of the light which is not transmitted by the second optical element, and the second photo detector is optically coupled to the second optical element for detecting a second component of the part of the light which is transmitted by the second optical element. One of the first and the second optical elements is an optical filter and the other is a sensor element, where the sensor element or the filter is tunable.

Abstract: An optical sensor arrangement for measuring an observable including at least one light source for generating a first light component of a first frequency including a first mode and a second light component of a second frequency including a second mode orthogonal to the first mode, an optical resonator having differing optical lengths for the first and second modes, at least one of the optical lengths being variable depending on the observable and a dependence of the respective optical length being different for the first and second modes, and a detector unit coupled to the optical resonator for coupling out the two light components and being configured for detecting a frequency difference between a resonance frequency of the optical resonator for the first mode and a resonance frequency of the optical resonator for the second mode.

Abstract: A sensor arrangement including a light source, a first optical element, a second optical element, a first photo detector, and a second photo detector. The light source is optically coupled to the first optical element that is optically coupled to the second optical element. The first photo detector is optically coupled to the first optical element for detecting a first component of the part of the light which is not transmitted by the second optical element, and the second photo detector is optically coupled to the second optical element for detecting a second component of the part of the light which is transmitted by the second optical element. One of the first and the second optical elements is an optical filter and the other is a sensor element, where the sensor element or the filter is tunable.

Abstract: The present disclosure relates to an example method and optical sensor for detecting molecules of a particular substance by means of an optical sensor. Such an example method may include bringing the sensor into contact with a fluid to be analyzed, coupling light of a first wavelength into an optical resonator of the optical sensor, coupling light of a second wavelength into the same resonator or into a second optical resonator of the optical sensor, detecting, for each of the first and the second wavelengths, an optical signal coupled out of an optical path containing the respective resonator, varying an optical length of the respective resonator or the respective wavelength and detecting a broadening of this resonance indicating an absorption of the light fed into the respective resonator by molecules accumulated at the active layer of this resonator.

Abstract: The invention relates to an optical sensor arrangement comprising a measuring optical fiber demonstrating birefringence modifiable as a function of a measurement variable, and to an optical analysis unit having two optical branches implemented as optical fibers forming a Mach-Zehnder interferometer and an optical coupler for bringing together light guided in the two branches, wherein at least one output of the coupler is optically connected to at least one light-sensitive element, and wherein the analysis unit comprises a polarizing beam splitter from which the optical branches originate, wherein the measurement optical fiber is connected upstream of an optical input of the polarizing beam splitter, and wherein a polarization converter is disposed in a course of one of the optical branches. The invention further relates to a detection method that can be performed using said sensor arrangement.

Abstract: The invention relates to an optical modulator, comprising a first waveguide for a signal to be modulated, a second waveguide for a control signal, and an auxiliary waveguide, wherein the auxiliary waveguide is supported by a carrier which can be deflected to change a distance between the first waveguide and the auxiliary waveguide, wherein the carrier also comprises two layers with different coefficients of thermal expansion and the second waveguide is guided in such a way that a temperature of the carrier at least in a section can be manipulated by light transported by the second waveguide. The invention further relates to an integrated optical circuit comprising such an optical modulator, and to a modulation method which can be performed with such a modulator.

Abstract: The invention relates to an optical sensor comprising an optical waveguide (1) and a light-sensitive element (4) for detecting light coupled out of the waveguide (1) and also various ring resonators (2), the ring resonators (2) being coupled optically to the mentioned waveguide (1) and, with the exception of at most one of the ring resonators (2), each having a means (5) for adjusting resonance frequencies of the respective ring resonator (2) and/or of the coupling between the ring resonator (2) and the waveguide (1) and at least two of the ring resonators (2) having different optical lengths in an initial state and being disposed for having their resonance frequencies influenced by means of different variables to be measured which are specific for each of these ring resonators (2). The invention refers furthermore to a method which can be implemented with a sensor of this type for detecting molecules of at least one substance.

Abstract: The invention relates to an optical sensor arrangement comprising a measuring optical fiber demonstrating birefringence modifiable as a function of a measurement variable, and to an optical analysis unit having two optical branches implemented as optical fibers forming a Mach-Zehnder interferometer and an optical coupler for bringing together light guided in the two branches, wherein at least one output of the coupler is optically connected to at least one light-sensitive element, and wherein the analysis unit comprises a polarizing beam splitter from which the optical branches originate, wherein the measurement optical fiber is connected upstream of an optical input of the polarizing beam splitter, and wherein a polarization converter is disposed in a course of one of the optical branches. The invention further relates to a detection method that can be performed using said sensor arrangement.

Abstract: The invention relates to an optical modulator, comprising a first waveguide for a signal to be modulated, a second waveguide for a control signal, and an auxiliary waveguide, wherein the auxiliary waveguide is supported by a carrier which can be deflected to change a distance between the first waveguide and the auxiliary waveguide, wherein the carrier also comprises two layers with different coefficients of thermal expansion and the second waveguide is guided in such a way that a temperature of the carrier at least in a section can be manipulated by light transported by the second waveguide. The invention further relates to an integrated optical circuit comprising such an optical modulator, and to a modulation method which can be performed with such a modulator.