3 GHz bandwidth rutile Bragg cell

L. W. J. Kent

doi:10.1117/12.803620

Abstract

We report the development of a 3GHz bandwidth Bragg cell designed for operation at 488nm with a peak optical diffraction efficiency of 2.3%/RF Watt. This device has the highest bandwidth ever reported for an optical polarisation switching Bragg cell. The device is manufactured using an optically rotated cut of single crystal rutile (TiO₂). Three prototype devices have been built and each have an acousto-optic response centred on ~5GHz that is flat to better than 3dB. Excellent electrical match to the device transducer has been demonstrated on all three devices. The best device had a VSWR of 2:1 over a bandwidth of 5.55GHz centred on 5.15GHz. These new devices exhibit low acoustic attenuation across the optical aperture and also have low optical scatter. They will permit the development of ultra-wide band acousto-optic spectrometers.

Citation Download Citation

L. W. J. Kent, L. W. J. Kent, "3 GHz bandwidth rutile Bragg cell", Proc. SPIE 7100, Optical Design and Engineering III, 710027 (27 September 2008); doi: 10.1117/12.803620; https://doi.org/10.1117/12.803620

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