Optical pulse generation in nanosecond range with conventional high-power LED modules for metrology and calibration purposes

Elena Kabardiadi-Virkovski; Alexander Kabardiadi-Virkovski; Peter Hartmann

doi:10.1117/12.2649796

14 March 2023 Optical pulse generation in nanosecond range with conventional high-power LED modules for metrology and calibration purposes

Elena Kabardiadi-Virkovski, Alexander Kabardiadi-Virkovski, Peter Hartmann

Author Affiliations +

Proceedings Volume 12441, Light-Emitting Devices, Materials, and Applications XXVII; 124410J (2023) https://doi.org/10.1117/12.2649796
Event: SPIE OPTO, 2023, San Francisco, California, United States

Conference Poster

Abstract

Light-Emitting Diodes (LEDs) are commonly used in various applications in the field of optical metrology and remote sensing, typically as light or signal sources. They stand out with their high energy efficiency and long lifespan, provide high brightness and low coherence and at the same time, they are inexpensive optical components. Apart from the field of optical metrology, low coherent short-pulsed light sources with high repetition stability and tunable amplitude are widely used for calibration and referencing of optical systems. This work focuses on the generation of short optical pulses (down to 10 ns FWHM) with conventional high-power LEDs for metrology purposes. A pulse generation technique, which allows tuning the pulse width and amplitude through the temporal management of three independent edges of TTL-like signals, is presented. The introduced technique considers the LED to be a first-order system and exploits this property to turn the task of electric current management into the task of temporal edge management. The proposed modulation technique is demonstrated and evaluated on the discrete component-based implementation. The achieved relation between the pulse width and the output optical intensity was demonstrated. The pulse-pulse stability (deviations in range of −60 dB) and the long-time stability of the realized modulation system were investigated in a long-time test series by different pulse amplitudes. The spectral properties of the output optical signals of the applied LEDs when excited by a short intensive current pulse were measured with a time-shifting integration method and are presented temporally resolved.

Citation Download Citation

Elena Kabardiadi-Virkovski, Alexander Kabardiadi-Virkovski, and Peter Hartmann "Optical pulse generation in nanosecond range with conventional high-power LED modules for metrology and calibration purposes", Proc. SPIE 12441, Light-Emitting Devices, Materials, and Applications XXVII, 124410J (14 March 2023); https://doi.org/10.1117/12.2649796

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