An open path gas detection system includes a transmitter and a receiver. The transmitter is configured to generate illumination, having broadband spectrum, across an open path. The receiver is positioned to detect the illumination from the transmitter after the illumination has passed through the open path. The receiver includes at least one spectrometer configured to determine spectroscopic information of the illumination to identify at least one gas of interest based on the spectroscopic information and provide an output based on the at least one gas of interest.

The invention relates to a sensor for a terahertz imaging system, comprising an array of terahertz radiation receivers; and an array of terahertz radiation transmitters having the same pitch as the array of receivers, located between the array of receivers and an analysis zone located in the near field of the transmitters, and configured such that each transmitter emits a wave towards both the analysis zone and a respective receiver of the array of receivers.

An infrared-detecting device, includes an infrared detector configured to emit a signal representative of the thermal radiation of a hotspot, and a light source configured to emit an incident beam, preferably in a window of UV or visible wavelength. The infrared-detecting device furthermore comprises a synchronizing device connected to the light source and to the infrared detector or to the processing module, and configured to emit a synchronization signal, the infrared detector being configured to be activated in a preset time window depending on said synchronization signal.

Described herein are optical sensing devices for photonic integrated circuits (PICs). A PIC may comprise a plurality of waveguides formed in a silicon on insulator (SOI) substrate, and a plurality of heterogeneous lasers, each laser formed from a silicon material of the SOI substrate and to emit an output wavelength comprising an infrared wavelength. Each of these lasers may comprise a resonant cavity included in one of the plurality of waveguides, and a gain material comprising a non-silicon material and adiabatically coupled to the respective waveguide. A light directing element may direct outputs of the plurality of heterogeneous lasers from the PIC towards an object, and one or more detectors may detect light from the plurality of heterogeneous lasers reflected from or transmitted through the object.

Systems and methods disclosed herein provide for detecting gas by: illuminating, with a controllable illuminator system, a scene with light including radiation within the infrared (IR) wavelength range; controlling the illuminator system to emit light at a first wavelength corresponding to a first absorption level of a gas and at a second wavelength corresponding to a second absorption level of a gas, such that an equal amount of radiant energy over a time period is emitted onto the scene for each of said first and second wavelengths; and capturing a first IR image of the scene being illuminated with light at said first wavelength and a second IR image of the scene illuminated with light at said second wavelength, and comparing said first and second IR images to determine whether a characteristic for at least one specific gas is represented in said first and/or second IR images.

In an embodiment, an apparatus (100) is described. The apparatus comprises an infrared, IR, generating system (102). The IR generating system comprises a first IR source (104) configured to produce IR radiation for forming a first IR beam (106) in a first spectral band. The IR generating system further comprises a second IR source (108) configured to produce IR radiation for forming a second IR beam (110) in a second spectral band. The apparatus further comprises a beam manipulation system (112) configured to combine a beam path of the first and second IR beams and direct the first and second IR beams along the beam path through a gas sample region (114). The apparatus further comprises an IR detection system (116) configured to detect an intensity of the first and second IR beams after passage through the gas sample region. The IR detection system is configured to produce a signal (118) from which an indication of a concentration of a target gas in the gas sample region can be derived.

Described herein is a device and a method for generating radiation, in particular pulsed radiation, specifically within the infrared spectral range. Also described herein is a computer program product which includes executable instructions for performing the method. The device for generating radiation includes at least one radiation emitting element, where the radiation emitting element is designated for generating radiation upon being heated by an electrical current; a mount, where the mount carries the at least one radiation emitting element, and where the mount or a portion thereof is movable; and a heat sink, where the heat sink is designated for cooling the mount and the at least one radiation emitting element being carried by the mount upon being touched by the mount. The device, the method, and the computer program product can be used in a spectroscopic application.

An emitter structure includes a substrate with a membrane arrangement. The membrane arrangement includes at least one first membrane, a first heating path and a second heating path in different substrate planes. The first heating path and the second heating path are positioned with respect to one another such that a projection of the first heating path and a projection of the second heating path onto a common plane lie at least partly next to one another in the common plane.

Aspects relate to a spectral analyzer that can be used for biological sample detection. The spectral analyzer includes an optical window configured to receive a sample and a spectral sensor including a chassis having various component assembled thereon. Examples of components may include a light source, a light modulator, illumination and collection optical elements, a detector, and a processor. The spectral analyzer is configured to obtain spectral data representative of a spectrum of the sample using, for example, an artificial intelligence (AI) engine. The spectral analyzer further includes a thermal separator positioned between the light modulator and the light source.

An emitter structure includes a substrate with a membrane arrangement. The membrane arrangement includes at least one first membrane, a first heating path and a second heating path in different substrate planes. The first heating path and the second heating path are positioned with respect to one another such that a projection of the first heating path and a projection of the second heating path onto a common plane lie at least partly next to one another in the common plane.