There is a need to develop large-aperture acousto-optic tunable filters (AOTFs) in the UV region for applications in astronomy, environmental sciences, biology, etc. We have developed a high-quality noncollinear AOTF cell that uses a single crystal of KDP that has nearly a four times larger acousto-optic figure of merit, <i>M</i><sub>2</sub>, than quartz. The linear and angular apertures of this cell are 1.5 cm × 1.5 cm and 1.2°, respectively. The spectral range is 220–480 nm, with 160-cm<sup>−1</sup> spectral resolution and high transmission in the UV. We present an analysis of the design and describe the characterization results.
© 2004 Optical Society of America
(120.2440) Instrumentation, measurement, and metrology : Filters
(160.1050) Materials : Acousto-optical materials
(220.4610) Optical design and fabrication : Optical fabrication
(230.1040) Optical devices : Acousto-optical devices
(260.7190) Physical optics : Ultraviolet
Vitaly Voloshinov and Neelam Gupta, "Ultraviolet-Visible Imaging Acousto-Optic Tunable Filters in KDP," Appl. Opt. 43, 3901-3909 (2004)