KEYWORDS: Micromirrors, Signal detection, Modulation, Semiconductor lasers, Mirrors, Signal to noise ratio, Free space optics, Sensors, Microelectromechanical systems, Collimation
We present the use of a micromirror to dynamically improve an optical wireless communications link. The
signal-to-noise ratio (SNR) is improved by directing the output of a 675 nm laser diode modulated at 10
MHz toward a receiver and by varying the divergence of the output beam using a varifocal, tip-tilt-piston
micromirror. The SNR has a dynamic range of 30 dB for a diffuse source, all by optimizing the overall shape
and direction of the mirror.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.