VCSEL Testing in Manufacturing Traces

Determine: Excessive-resolution array spectroradiometers with integrating spheres enable for the quick and dependable spectral characterization of VCSELs. Elective photodiode sensors can additional enhance the precision of the radiant energy measurement.

The excessive measurement velocity requires that such spectral measurements are normally carried out with solely a single, millisecond lengthy optical pulse within the integration time window of the spectroradiometer.

In such programs, the integrating sphere homogenizes the sunshine subject and the array spectroradiometer has to document the laser spectrum with the mandatory accuracy and measurement velocity. For gentle sources with a really slim spectrum, the precision of the radiant energy measurement may be additional elevated with a further photodiode sensor connected to and calibrated with the ISP. That is really useful for prime precision measurements to right deviations as a result of wavelength-dependent reflectivity of the DUT and its environment with the self-absorption correction methodology. For this, it’s crucial to decide on an acceptable auxiliary gentle supply with an appropriate spectral energy density distribution. The slim spectral bandwidth of VCSELs – sometimes within the vary of a nanometer – requires spectroradiometers with sub-nanometer spectral decision. Instrument Methods gives with the CAS 140CT-HR, the CAS 120-HR and the CAS 100-HR three high-resolution spectrometer platforms and moreover integrating spheres and appropriate auxiliary gentle sources for semiconductor laser diode testing in manufacturing strains. A brand new quick InGaAs photodiode specifically designed for nanosecond pulsed VCSEL measurements (as utilized in LiDAR or Time-of-Flight 3D sensing purposes) completes the portfolio.

Key options:

Excessive spectral decision all the way down to Zero.12 nm
PTB traceable measurements
Excessive sensitivity for prime all through (UPH)
Brief integration occasions all the way down to 9 ms with CAS 140CT-HR &
four ms with CAS 120-HR / CAS 100-HR
Elective: ISP with photodiode sensor
Elective: auxiliary gentle supply for DUT particular self-absorption correction
Elective: 1.four GHz InGaAs photodiode for ns pulse testing 

Key outcomes:

Optical spectrum
Peak wavelength
Radiant energy


Kastenbauerstrasse 2
Munich, 81677
+49 89454943-Zero
www.instrumentsystems.comInstrument Methods GmbH, based in Munich in 1986, develops, manufactures and markets all-in-one options for gentle measurement know-how. Our key merchandise are array spectroradiometers, luminance cameras and imaging colorimeters. The principle areas of software are LED/SSL and show colorimetry, spectral radiometry and photometry in addition to laser/VCSEL characterization. In the present day Instrument Methods is among the world’s main producers within the trade. Merchandise of the Optronik Line for the automotive trade and visitors know-how are developed and marketed at its Berlin location. Since 2012 Instrument Methods has been a wholly-owned subsidiary of the Konica-MinoIta Group.

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