VCSEL as sensing element to measure distance changes in the nm-range

verfasst von

A. Günther, D. Korat, P. Kotra, W. Kowalsky, B. Roth

Abstract

We investigated a novel sensor concept based on a coupled resonator configuration and the employment of vertical-cavity surface-emitting laser (VCSEL) sources. Hereby, the back reflection of a sample which is placed next to the emission window of the semiconductor based laser source affects the internal resonator conditions of the VCSEL. If the operating voltage is kept constant, the internal interaction results in a change of the emitted wavelength and operating current, respectively. First experiments show a reproducible change of the operating current when the sample is moved in vertical direction by a few nm. This behavior was previously verified with a simulation based on ANSYS Lumerical by creating distributed Bragg reflection (DBR) stacks with different layers and quantifying the influence of the movable third resonator surface on the emission wavelength.

Organisationseinheit(en)

Hannoversches Zentrum für Optische Technologien (HOT)
PhoenixD: Simulation, Fabrikation und Anwendung optischer Systeme

Externe Organisation(en)

Technische Universität Braunschweig

Typ

Aufsatz in Konferenzband

Publikationsdatum

15.03.2023

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Elektronische, optische und magnetische Materialien, Physik der kondensierten Materie, Angewandte Informatik, Angewandte Mathematik, Elektrotechnik und Elektronik

Elektronische Version(en)

https://doi.org/10.1117/12.2646484 (Zugang: Geschlossen)