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Instrument Systems to show latest optical tools

Company will be presenting test portfolio for IR emitters and VCSELs at Laser World of Photonics

At Laser World of Photonics (Munich, Germany, June 27-30, 2023), Instrument Systems presented its test portfolio for IR emitters and VCSELs.

New product developments in the CAS series of spectroradiometers and VTC cameras cater for the rapidly growing market for VCSEL production for the short-wave infrared range from 780 to 1700 nm.

Compared to its predecessor, the new CAS 140D IR offers improved performance in signal sensitivity, stray light suppression and electronics. The VTC 4000 near-field camera enables polarisation-controlled characterisation of the individual emitters of a VCSEL array by the one-shot process. The VTC 2400 far-field camera was specially developed for production-capable testing of laser-based components such as LiDAR systems.

Instrument Systems’ new CAS 140D IR spectroradiometer has been optimised for spectral measurements in the SWIR (short-wave infrared) range. It features the proven high level of measurement accuracy and reliability of the CAS 140D series, recognised worldwide as a reference for wavelengths of 780 to 1700 nm. Compared to its predecessor model from the CAS 140CT series, the CAS 140D IR offers a significantly enhanced performance: Thanks to the newly designed optical structure, its throughput is up to 70% higher. The proportion of scattered light has again been significantly reduced. The new electronic platform enables a faster processing of measurement data with a minimum integration time of 1 ms and a scanning time of 9 ms. The advantages for the user are higher productivity due to shorter measurement times and higher accuracy and repeatability.

Instrument Systems’ VTC 4000 near-field camera was specially designed for the ultrafast, precise 2D analysis of VCSEL arrays. It enables polarisation-corrected measurement of the performance of an emitter or array. Due to a unique calibration concept, the 2D near-field characterisation takes place with unprecedented measurement accuracy, according to the company. This concept is based on flat-field and polarisation correction, and corrects the polarisation dependence of the optical system. The calibrated VTC 4000 thus allows the absolute measurement of power and measurement of the polarisation properties of each individual emitter within the camera field of view in the one-shot process. The VTC 4000 camera is traceably calibrated to national standards (PTB) and provides measured values with absolute accuracy. Manufacturers can exploit the full power efficiency of VCSELs while ensuring safe operation.

The VTC 2400 from Instrument Systems is a high-resolution infrared camera that was custom-fit for 2D far-field analysis of the beam strength distribution of VCSEL and IR emitters. The cost-effective measurement system consists of a translucent, diffuse Lambert scattering screen and a monochrome camera specialised in measurements in the near infrared range. A light-tight camera body makes the system suitable for both laboratory and production applications. In the measurement setup, the screen stands between the radiation source (DUT) and the infrared camera, so that the typical radiation characteristic of the DUT is visible on the screen. The VTC 2400 infrared camera captures this 2-dimensional image in a single measurement and converts the irradiance [W/m2] into the beam strength distribution [W/sr] of the DUT via a calibration.

Presentation at SPIE Digital Optical Technologies (ICM)

Parallel to LASER WoP, the World of Photonics Congress will take place in the neighbouring ICM, where Instrument Systems will be represented with a lecture byAmir Sharghi: 'Two-dimensional LIV and beam quality characterisation of individual emitters in a VCSEL array'.

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