High-speed programmable optical attenuator.
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Date
2000-07-13
Authors
Riza, Nabeel A.
Yaqoob, Zahid
Journal Title
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Publisher
Society of Photo-Optical Instrumentation Engineers (SPIE)
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Abstract
A high-speed programmable optical attenuator (POA) 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 acousta-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 CLS regime, and was observed as low as 0.175 mu s. The polarization dependent loss (PDL) was about 0.7 dB, whereas the excess losses were about 1.5 dB.A high-speed programmable optical attenuator (POA) 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 acousta-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 CLS regime, and was observed as low as 0.175 mu s. The polarization dependent loss (PDL) was about 0.7 dB, whereas the excess losses were about 1.5 dB.
Description
Keywords
Signal attenuation , Acousto-optics , Attenuators , Optical attenuators , Acoustics , GRIN lenses , Bragg cells
Citation
Riza, N. A. and Yaqoob, Z. (2000) 'High-speed programmable optical attenuator', Proceedings of SPIE, 4046, Advances in Optical Information Processing IX. AeroSense 2000 Orlando, FL, United States. doi: 10.1117/12.391937
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© 2000 Society of Photo-Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.