OSATVシリーズ(VOA)は、自由に減衰値を調整できる

可変光アッテネータ（可変光減衰器） Variable Optical Attenuator
An optical Attenuator, based on MOEMS (Micro-Optic Electro-Mechanical Systems), is a critical electronic component in implementing remote control of gain regulating in optical telecommunication networks.
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Variable Optical Attenuator
Wide Attenuating Range, High Resolution, Low Insertion Loss, High Return Loss Excellent Temperature & Humidity Stability, Compact Package.