Submicrosecond speed variable optical attenuator using acoustooptics
Submicrosecond speed variable optical attenuator using acoustooptics
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DOI：
10.1109/68.930417
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发表时间：
2001-07
影响因子：
2.6
通讯作者：
N. Riza;Z. Yaqoob
中科院分区：
文献类型：
--
作者：
N. Riza;Z. Yaqoob
介绍了一种新型的可调光衰减器（VOA），它可以在亚微秒级的高速下提供高动态范围和高分辨率。VOA的设计利用了一个在线的一对一成像光学架构与布拉格模式声光布拉格细胞。光学衰减通过布拉格单元的频率和驱动电压控制实现，从而实现灵活和精确的衰减水平设置。VOA的动态范围为45 dB，开关时间为175 ns。其他测量参数包括1.14 dB/MHz分辨率，1.56 dB偏振相关损耗和3.55 dB的额外损耗。
A novel variable optical attenuator (VOA) is introduced that can provide high dynamic range and high-resolution all at fast submicrosecond speeds. The VOA design exploits an in-line one-to-one imaging optical architecture operating with Bragg-mode acoustooptic Bragg cells. Optical attenuation is achieved via frequency and drive voltage control of the Bragg cells, leading to flexible and precise attenuation-level settings. VOA demonstrated a 45-dB dynamic range with a 175-ns switching time. Other measured parameters include 1.14-dB/MHz resolution, 1.56-dB polarization dependent loss, and an excess loss of 3.55 dB.