3 GHz bandwidth rutile Bragg cell

L. W. J. Kent

doi:10.1117/12.803620

27 September 2008 3 GHz bandwidth rutile Bragg cell

L. W. J. Kent

Proceedings Volume 7100, Optical Design and Engineering III; 710027 (2008) https://doi.org/10.1117/12.803620
Event: Optical Systems Design, 2008, Glasgow, Scotland, United Kingdom

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

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