13 July 2000 High-speed programmable optical attenuator
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A high-speed programmable optical attenuator is introduced that can provide high dynamic range and high resolution attenuation control. An acousto-optic Bragg cell has been used to realize the desired attenuator. Various practical architectures have been proposed to prove the concept. A typical acousto-optic deflector (AOD) based design offers a dynamic range of 46.11 dB. The average resolution is 3.08 dB/volt whereas the best resolution achieved is 0.39 dB/volt. The response time of the AO attenuator is in the sub microsecond(s) regime, and was observed as low as 0.175 microsecond(s) . The polarization dependent loss was about 0.7 dB, whereas the excess losses were about 1.5 dB.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Nabeel A. Riza, Nabeel A. Riza, Zahid Yaqoob, Zahid Yaqoob, "High-speed programmable optical attenuator", Proc. SPIE 4046, Advances in Optical Information Processing IX, (13 July 2000); doi: 10.1117/12.391937; https://doi.org/10.1117/12.391937


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