ULTRA-FAST 80 kHz MID-INFRARED SPECTROSCOPY
The drive current of a mid-infrared laser at 3329 nm is modulated in amplitude at 1 kHz and the ultra-fast 80 kHz edition of the NLIR 2.0 – 5.0 µm spectrometer measures the laser spectrum with a temporal resolution of 12.5 µs. When the drive current is modulated, the amplitude and center frequency of the laser changes, and these characteristics are clearly visible in the data shown in the figure.
Measurement done by Marc-Simon Bahr at HAW Hamburg, Department of Information and Electrical Engineering.
COATING MEASUREMENT
Transmission measurement of coated IR windows:
- Single-shot
- 20 ms exposure time
- 30 W globar light source
MEASUREMENT OF MID-INFRARED ns PULSES
Light from an NKT Photonics MIR Compact supercontinuum source, which emits 5 ns pulses at 40 kHz covering a spectrum from 2 µm to 4.2 µm, is measured using two different point detectors. A MIR monochromator selects the wavelength 2.4 µm with a 20 nm bandwidth, and the output is coupled to a 200 µm MIR fiber. The output of the fiber is sent in turn to each of two detectors: an NLIR 240 MHz 2.4 µm Single-wavelength detector (with 50 dB attenuation) and a commercially available 9 MHz InAsSb detector with direct exposure. The figure shows the responses of the two detectors.
Mid-infrared spectrometers and detectors – a new paradigm
The fastest infrared detectors on the market
➢ 130 kHz spectroscopy
➢ 10 GHz point detection
A new standard for sensitivity and responsivity
➢ Few fW/√Hz
➢ Up to GV/W
Bandwidth flexibility
➢ 2.0 – 5.0 µm
➢ The narrower the bandwidth, the higher the response
See our products
See our spectrometers, point detectors, and conversion module; all the devices are outstanding in sensitivity, speed and noise performance.
Read about our technology
The enabling technology of NLIR is upconversion of mid-infrared wavelengths to near-visible wavelengths. This key optical process allows detection of mid-infrared light by Si or GaAs detectors, which are far superior in terms of detectivity, speed, and noise
What are our products used for?
Our products have a wide range of applications from ultra-sensitive or rapid power detection and spectral analysis of light sources to measurement of different kind of samples, for example plastics, optical coatings, components in water and oil solutions, and mixes of gases.
The core of the technology
Free Spectrometer Software included
- Easy connect and use software included.
- Data live stream, external trigger mode, background capture, transmission view, data saving, etc.
- API for spectrometers in MATLAB and Python available upon request.
