A wavelength-multiplexed optical scanning scheme is proposed for deflecting a free-space optical beam by selection of the wavelength of the light incident on a wavelength-dispersive optical element. With fast tunable lasers or optical filters, this scanner features microsecond domain scan setting speeds and large- diameter apertures of several centimeters or more for subdegree angular scans. Analysis performed indicates an optimum scan range for a given diffraction order and grating period. Limitations include beam-spreading effects based on the varying scanner aperture sizes and the instantaneous information bandwidth of the data-carrying laser beam.
© 2001 Optical Society of America
(050.1950) Diffraction and gratings : Diffraction gratings
Zahid Yaqoob, Azhar A. Rizvi, and Nabeel A. Riza, "Free-Space Wavelength-Multiplexed Optical Scanner," Appl. Opt. 40, 6425-6438 (2001)