Abstract: In a method or system for interrogating an optical chip (50), the optical chip (50) is illuminated with input light (30) and a spatially resolved image (50i) of the output light (31,32) is measured from the optical chip (50). The output light (31,32) is imaged together with a reflection of the input light (30). For example, this can be used to establish, improve, or maintain alignment of the input light (30) on a sensor input port (51) of the optical chip (50). The same detector (17) measures the spatially resolved image and a spectral response of the optical chip (50).

Abstract: Methods and instruments for measuring a liquid sample (S1) in a well plate (50) by means of an optical chip 10. The chip (10) comprises an optical sensor (13) that is accessible to the liquid sample (S1) at a sampling area (SA) of the chip. A free-space optical coupler (11,12) is accessible to receive input light (L1) and/or emit output light (L2) via a coupling area (CA) of the chip (10). The sampling area (SA) of the chip 10 is submerged in the liquid sample (S1) while keeping the liquid sample (S1) away from the coupling area (CA) for interrogating the optical coupler (11,12) via an optical path (P) that does not pass through the liquid sample (S1).

Abstract: Methods and instruments for measuring a liquid sample (S1) in a well plate (50) by means of an optical chip 10. The chip (10) comprises an optical sensor (13) that is accessible to the liquid sample (S1) at a sampling area (SA) of the chip. A free-space optical coupler (11,12) is accessible to receive input light (L1) and/or emit output light (L2) via a coupling area (CA) of the chip (10). The sampling area (SA) of the chip 10 is submerged in the liquid sample (S1) while keeping the liquid sample (S1) away from the coupling area (CA) for interrogating the optical coupler (11,12) via an optical path (P) that does not pass through the liquid sample (S1).

Abstract: A wireless power transmitter capable of detecting a receiver and a method for the same is described. According to some implementations, the transmitter is configured to detect the presence of the receiver by detecting a change in capacitance in the transmitter by detecting the change in a current flowing through a capacitive circuit at the transmitter. According to some implementations, the capacitive circuit is formed by a first transmission coil corresponding to a first electrode and a second transmission coil corresponding to a second electrode. According to some implementations, the capacitive circuit is formed by a transmission coil as an electrode and a ground, or by the electrode and the receiver circuitry.

Abstract: A method and system for measuring a sample property (X) by means of photonic circuit (10). The photonic circuit (10) comprises at least two photonic sensors (11, 12) configured to modulate the light according to respective output signals (S1,S2) with periodically recurring signal values (V1, V2). The photonic sensors (11, 12) comprise a low range sensor (11) with a relatively low range or high sensitivity for measuring a change (?X) of the sample property (X) and a high range sensor (12) with a relatively high range or low sensitivity to measure the change (?X) of the sample property (X). The sample property (X) is calculated by combining the output signals (S1, S2) of the sensors (11, 12). Particularly, the second output signal (S2) of the high range sensor (12) is used to distinguish between recurring signal values (V1) in the first output signal (S1) of the low range sensor (11).

Abstract: The present disclosure concerns a method and apparatus for measuring a sensor (10) comprising multiple optical resonators (11, 12) optically connected to a single optical output interface (16). The optical resonators (11, 12) are interrogated with a light input signal (Si). A light output signal (So) is measured from the optic al output interface (16) to determine a combined spectral response (Sa) covering a wavelength range (W) including a plurality of resonance peaks (?1,i, ?2,j) for each of the optical resonators (11, 12). A Fourier transform spectrum (FT) of the combined spectral response (Sa) is calculated and a harmonic series of periodic peaks (n·f1) is identified in the Fourier transform spectrum (FT). The harmonic series of periodic peaks is filtered to obtain a filtered Fourier transform spectrum (FT1) and a sensor signal is calculated (X1) based on the filtered Fourier transform spectrum (FT1).

Abstract: A method and system for measuring a sample property (X) by means of photonic circuit (10). The photonic circuit (10) comprises at least two photonic sensors (11, 12) configured to modulate the light according to respective output signals (S1,S2) with periodically recurring signal values (V1, V2). The photonic sensors (11, 12) comprise a low range sensor (11) with a relatively low range or high sensitivity for measuring a change (?X) of the sample property (X) and a high range sensor (12) with a relatively high range or low sensitivity to measure the change (?X) of the sample property (X). The sample property (X) is calculated by combining the output signals (S1, S2) of the sensors (11, 12). Particularly, the second output signal (S2) of the high range sensor (12) is used to distinguish between recurring signal values (V1) in the first output signal (S1) of the low range sensor (11).

Abstract: The invention relates to a system for transmitting power inductively from a transmitter (11) to a receiver (10), the receiver (10) comprising a signal generator for generating a signal, triggered by an event reflecting that the receiver intends to receive power from the transmitter, wherein said signal intends to activate said transmitter from standby mode to activated mode; and comprising a signal transmitting coil (103) for transmitting said signal to said transmitter; said transmitter (11) comprising a signal receiving coil (112); a detector (114) for detecting said signal received by the receiving coil; and a unit (115) for activating the transmitter from standby mode to activated mode upon the detection of said signal.

Abstract: The present disclosure concerns a photonic integrated circuit (10) and a method for interrogating a ring resonator (3) comprised therein. The circuit (10) comprises an optical port (4) for coupling light (L) into and out of the circuit (10). The circuit (10) further comprises a first waveguide (1) for receiving light (L1) from the optical port (4), and a second waveguide (2) for sending back light to the optical port (4). The ring resonator (3) is arranged between the first waveguide (1) and the second waveguide (2) for coupling a resonant wavelength (?) of the light therein between. The optical port (4) comprises a polarization splitting coupler for coupling light of a first polarization (P1) to and from the first waveguide (1) and coupling light of a second polarization (P2), orthogonal to the first polarization (P1), to and from the second waveguide (2).

Abstract: A method of detecting a receiver (214) by a transmitter and a transmitter for detecting a receiver are provided. The transmitter is intended to transmit power inductively to the receiver (214). The transmitter comprising a first transmission coil as a first electrode (204) and a second electrode (206). The first electrode (204) and the second electrode (206) form a capacitor (202). The method comprises the steps of applying a voltage (216) to any one of the electrodes (204, 206) and detecting a capacitance change of the capacitor (202).

Abstract: A method of detecting a receiver (214) by a transmitter and a transmitter for detecting a receiver are provided. The transmitter is intended to transmit power inductively to the receiver (214). The transmitter comprising a first transmission coil as a first electrode (204) and a second electrode (206). The first electrode (204) and the second electrode (206) form a capacitor (202). The method comprises the steps of applying a voltage (216) to any one of the electrodes (204, 206) and detecting a capacitance change of the capacitor (202).

Abstract: The present disclosure concerns a method and apparatus for measuring a sensor (10) comprising multiple optical resonators (11,12) optically connected to a single optical output interface (16). The optical resonators (11,12) are interrogated with a light input signal (Si). A light output signal (So) is measured from the optic al output interface (16) to determine a combined spectral response (Sa) covering a wavelength range (W) including a plurality of resonance peaks (?1,i, ?2,j) for each of the optical resonators (11,12). A Fourier transform spectrum (FT) of the combined spectral response (Sa) is calculated and a harmonic series of periodic peaks (n·f1) is identified in the Fourier transform spectrum (FT). The harmonic series of periodic peaks is filtered to obtain a filtered Fourier transform spectrum (FT1) and a sensor signal is calculated (X1) based on the filtered Fourier transform spectrum (FT1).

Abstract: The present disclosure concerns an apparatus (10) and method for reading out an optical chip (20). A light source (13) is arranged for emitting single mode source light (S1) from its emitter surface (A1) towards an optical input (21) of the optical chip (20). A light detector (14) is arranged for receiving measurement light (S2) impinging onto its receiver surface (A2) from an optical output (22) of the optical chip (20), and measuring said received measurement light (S2). The emitted source light (S1) is aligned to enter the optical input (21) of the optical chip (20) and the measurement light (S2) is aligned back onto the receiver surface (A2). The receiver surface (A2) is larger than the emitter surface (A1) for facilitating the overall alignment.

Abstract: The invention relates to an optical resonator biosensor for the detection of butyrylcholinesterase comprising two optical resonator biosensor systems in which in the first optical resonator biosensor system a probe is attached to the resonator wherein said probe is able to bind butyrylcholinesterase. Preferably said probe is able to bind uninhibited butyrylcholinesterase. In the second optical resonator biosensor system preferably an antibody is attached to the resonator, wherein said antibody is able to bind butyrylcholinesterase, preferably wherein said antibody is able to bind both inhibited and uninhibited butyrylcholinesterase.

Abstract: The present disclosure concerns a photonic integrated circuit (10) and a method for interrogating a ring resonator (3) comprised therein. The circuit (10) comprises an optical port (4) for coupling light (L) into and out of the circuit (10). The circuit (10) further comprises a first waveguide (1) for receiving light (L1) from the optical port (4), and a second waveguide (2) for sending back light to the optical port (4). The ring resonator (3) is arranged between the first waveguide (1) and the second waveguide (2) for coupling a resonant wavelength (?) of the light therein between. The optical port (4) comprises a polarization splitting coupler for coupling light of a first polarization (P1) to and from the first waveguide (1) and coupling light of a second polarization (P2), orthogonal to the first polarization (P1), to and from the second waveguide (2).

Abstract: The present disclosure concerns an apparatus (10) and method for reading out an optical chip (20). A light source (13) is arranged for emitting single mode source light (S1) from its emitter surface (A1) towards an optical input (21) of the optical chip (20). A light detector (14) is arranged for receiving measurement light (S2) impinging onto its receiver surface (A2) from an optical output (22) of the optical chip (20), and measuring said received measurement light (S2). The emitted source light (S1) is aligned to enter the optical input (21) of the optical chip (20) and the measurement light (S2) is aligned back onto the receiver surface (A2). The receiver surface (A2) is larger than the emitter surface (A1) for facilitating the overall alignment.

Abstract: An apparatus and method (4,5,6,7,2) for capacitive measurement of electrophysiological signals (1) suppresses or reduces motion artifacts by providing a feedback mechanism. An average voltage between a capacitive sensor electrode (1) and the body (3) is controlled so as to reduce or minimize motion-induced signals.

Abstract: There is provided a frequency tunable laser system comprising a laser, frequency varying means arranged for varying an optical frequency output of the laser, an intensity sensor arranged for receiving light from the laser, and a processor arranged for controlling the frequency varying means for varying the optical frequency output of the laser and receiving an intensity signal from the intensity sensor for monitoring the intensity output of the laser. The frequency tunable laser system further comprises an external reflective surface, in use, fixedly arranged in a light path of the laser beam outside the laser cavity at a predefined distance from the second reflective surface along the light path of the laser beam to reflect part of the emitted laser beam back into the laser cavity.

Abstract: A device for measuring a geometry of a fluid meniscus includes a fluid chamber storing a first electrically conductive fluid and a second electrically insulating fluid. The fluids are mutually immiscible and define a fluid meniscus in between them. The device further includes a main electrowetting electrode and auxiliary electrowetting electrodes for controlling the geometry of the fluid meniscus. A voltage source provides a voltage between the main electrowetting electrode and the auxiliary electrowetting electrodes and a measurement circuit separately measures capacitances between the main electrowetting electrode and at least two of the auxiliary electrowetting electrodes. The measurement circuit includes a multiplexer for demodulating a signal indicative for the capacitances.

Abstract: There is provided a frequency tunable laser system comprising a laser, frequency varying means arranged for varying an optical frequency output of the laser, an intensity sensor arranged for receiving light from the laser, and a processor arranged for controlling the frequency varying means for varying the optical frequency output of the laser and receiving an intensity signal from the intensity sensor for monitoring the intensity output of the laser. The frequency tunable laser system further comprises an external reflective surface, in use, fixedly arranged in a light path of the laser beam outside the laser cavity at a predefined distance from the second reflective surface along the light path of the laser beam to reflect part of the emitted laser beam back into the laser cavity.