Longitudinal piezoelectric resonant photoelastic modulator for efficient intensity modulation at megahertz frequencies.

ABSTRACT: Intensity modulators are an essential component in optics for controlling free-space beams. Many applications require the intensity of a free-space beam to be modulated at a single frequency, including wide-field lock-in detection for sensitive measurements, mode-locking in lasers, and phase-shift time-of-flight imaging (LiDAR). Here, we report a new type of single frequency intensity modulator that we refer to as a longitudinal piezoelectric resonant photoelastic modulator. The modulator consists of a thin lithium niobate wafer coated with transparent surface electrodes. One of the fundamental acoustic modes of the modulator is excited through the surface electrodes, confining an acoustic standing wave to the electrode region. The modulator is placed between optical polarizers; light prop

SUBMITTER: Atalar O 

PROVIDER: S-EPMC8941116 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature