Coupling to Modes of a Near-Confocal Optical Resonator Using a Digital Light Modulator
Alexander T. Papageorge, Alicia J. Koll\'ar, and Benjamin L. Lev
TL;DR
This paper demonstrates how a Digital Micromirror Device (DMD) can be used to selectively couple and probe specific modes of a near-confocal optical resonator, enabling precise control of cavity modes.
Contribution
It introduces a method to use a DMD for mode-specific coupling in a Fabry-Pérot cavity, advancing digital holography techniques for optical resonator control.
Findings
Successful coupling to arbitrary cavity modes
High specificity in mode excitation
Potential for rapid mode switching
Abstract
Digital Micromirror Devices (DMD) provide a robust platform with which to implement digital holography, in principle providing the means to rapidly generate propagating transverse electromagnetic fields with arbitrary mode profiles at visible and IR wavelengths. We use a DMD to probe a Fabry-P\'{e}rot cavity in single-mode and near-degenerate confocal configurations. Pumping arbitrary modes of the cavity is possible with excellent specificity by virtue of the spatial overlap between the incident light field and the cavity mode.
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