Experimental Study of PWM-Controlled Emission from a Large-Aperture VCSEL | Zendy

Miroslav Slouka | Zendy; Dalibor Javurek | Zendy; Erik Hendrych | Zendy; Marcel Stofik | Zendy; Martin Kutac | Zendy; Jan Latal | Zendy

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Experimental Study of PWM-Controlled Emission from a Large-Aperture VCSEL

Author(s) -

Miroslav Slouka,

Dalibor Javurek,

Erik Hendrych,

Marcel Stofik,

Martin Kutac,

Jan Latal

Publication year - 2025

Publication title -

ieee photonics journal

Language(s) - English

Resource type - Magazines

SCImago Journal Rank - 0.725

H-Index - 73

eISSN - 1943-0655

DOI - 10.1109/jphot.2025.3571423

Subject(s) - engineered materials, dielectrics and plasmas , photonics and electrooptics

This study demonstrates the use of pulse-width modulation (PWM) for mode selection in a large-aperture vertical-cavity surface-emitting laser (VCSEL). Experimental results reveal that driving the device with 1 kHz PWM pulses maintains a stable far-field pattern (FFP) and causes only negligible spectral drift. Increasing the PWM frequency up to 1 MHz redistributes the FFP from higher-order, donut-like transverse modes toward a centrally peaked, Gaussian-like mode, and shifts the dominant longitudinal resonance to shorter wavelengths. Encircled energy analysis quantifies these changes and confirms that PWM enables fine spatial and spectral emission control of the selected large-aperture VCSEL device. The results position PWM as a cost-effective and straightforward lever for dynamic VCSEL emission management.

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