A spectroscopic system may include: a probe having a probe tip and an optical coupler, the optical coupler including an emitting fiber group and first and second receiving fiber groups, each fiber group having a first end and a second end, wherein the first ends of the fiber groups are formed into a bundle and optically exposed through the probe tip; a light source optically coupled to the second end of the emitting fiber group, the light source emitting light in at least a first waveband and a second waveband, the second waveband being different from the first waveband; a first spectrometer optically coupled to the second end of the first receiving fiber group and configured to process light in the first waveband; and a second spectrometer optically coupled to the second end of the second receiving fiber group and configured to process light in the second waveband.

A spectroscopic system may include: a probe having a probe tip and an optical coupler, the optical coupler including an emitting fiber group and first and second receiving fiber groups, each fiber group having a first end and a second end, wherein the first ends of the fiber groups are formed into a bundle and optically exposed through the probe tip; a light source optically coupled to the second end of the emitting fiber group, the light source emitting light in at least a first waveband and a second waveband, the second waveband being different from the first waveband; a first spectrometer optically coupled to the second end of the first receiving fiber group and configured to process light in the first waveband; and a second spectrometer optically coupled to the second end of the second receiving fiber group and configured to process light in the second waveband.

Methods and apparatus are disclosed for detecting one or more species in a sample, wherein laser probe light is frequency swept across at least one infra red absorption spectrum feature of each of the species. A path from the probe light source to a single detector element may be switched between at least one sample absorption cell or volume and one or more reference cells or volumes.

Methods and apparatus are disclosed for detecting one or more species in a sample, wherein laser probe light is frequency swept across at least one infra red absorption spectrum feature of each of the species. A path from the probe light source to a single detector element may be switched between at least one sample absorption cell or volume and one or more reference cells or volumes.

An interferometer device includes an interferometer unit with at least two mirrors disposed in parallel, wherein at least one of the mirrors is actuatable parallel to the other mirror and a first distance between the two mirrors is alterable. The interferometer device further includes at least one deflection mirror disposed downstream of the interferometer unit in a light transmission direction of light from the interferometer unit and a detector device, onto which the light is able to be aligned by the deflection mirror. The detector device includes at least two differently sensitive detection regions for transmitted wavelengths or wavelength ranges of the light, which detection regions are spatially separated from one another and able to be irradiated separately by the deflection mirror.

A spectrum measurement system includes a laser light source system, an optical signal receiving system and a beam splitting system. The laser light source system is configured to emit a laser output light beam to the object. The laser output light beam includes at least one of a first and a second peak-wavelength laser. After the object is radiated by the laser output light beam, the object generates a conversion beam. The conversion beam includes at least one of a first and a second spectral signals. The optical signal receiving system includes at least a first and a second signal receivers being respectively configured to receive the first and the second spectral signals. The beam splitting system provides a plurality of light exiting paths being configured to respectively transmit the first and the second spectral signals to the first and the second signal receivers.

A system and method for analyzing a sample using Raman spectral light includes a light source, a light detector, a narrow band pass filter and an analyzer. Within the system, excitation light is directed to interrogate the sample. The narrow band pass filter is positioned to receive Raman scattered light produced as a result of the interrogation. The light detector is positioned to receive the Raman scattered light that has passed through the at least one narrow band pass filter. The analyzer contains stored instructions that when executed cause the processor to a) control the light source; and b) process signals produced by the light detector to analyze the sample material, the signals representative of the intensity of the Raman scattered light received by the at least one light detector corresponding to one or more wavenumbers in a high wavenumber region of a Raman signal.

A system and method for analyzing a sample using Raman spectral light includes a light source, a light detector, a narrow band pass filter and an analyzer. Within the system, excitation light is directed to interrogate the sample. The narrow band pass filter is positioned to receive Raman scattered light produced as a result of the interrogation. The light detector is positioned to receive the Raman scattered light that has passed through the at least one narrow band pass filter. The analyzer contains stored instructions that when executed cause the processor to a) control the light source; and b) process signals produced by the light detector to analyze the sample material, the signals representative of the intensity of the Raman scattered light received by the at least one light detector corresponding to one or more wavenumbers in a high wavenumber region of a Raman signal.

An optical property measurement apparatus includes a pulse formation unit, a waveform measurement unit, and an optical system. The pulse formation unit is capable of changing a temporal waveform of pulsed light in accordance with a type of optical property to be measured. The waveform measurement unit measures a temporal waveform of the pulsed light output from a measurement object after being incident on the measurement object. The optical system has an attenuation unit with an attenuation rate with respect to one wavelength component constituting the pulsed light larger than an attenuation rate with respect to another wavelength component constituting the pulsed light. The optical system is capable of switching between a first state in which the attenuation unit is arranged on an optical path of the pulsed light output from the measurement object and a second state in which the attenuation unit is not arranged on the optical path.

A system for determining a characteristic of a sample includes a light source for directing light into an input of a spectrometer. The spectrometer splits the received light into light outputs each having a different wavelength. An active wavelength selection module (AWSM) includes an optical receiving component (ORC). An actuator is coupled to the spectrometer and/or the ORC to adjust a relative position between the spectrometer and the AWSM so that light is receivable by the ORC from a selected one of the plurality of light outputs. The ORC is configured to direct the received light to a sample. A collector is positioned to collect a portion of light that passes through the sample, and to deliver the collected light to an analysis module. The analysis module is configured to determine a quantity of light transmitted through the sample and to correlate transmitted light with a characteristic of the sample.