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Electromagnetically Actuated Variable Optical Attenuator With Configurable Dynamic Range
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DOI：10.1109/LPT.2025.3598486.png)
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Abstract
En 中文
A variable optical attenuator (VOA) based on magnetically induced micro-displacement with a configurable dynamic range is proposed. The copper coil wound around the input fiber collimator, driven by precisely controlled low currents, generates a magnetic field that couples with the paired bar magnets to achieve lateral displacement, enabling continuous optical attenuation. By varying the inclination angle alpha (0-90 degrees) of the magnet pairs relative to the horizontal plane, the system simultaneously achieves both wide-range optical attenuation and precision-tunable optical coupling efficiency. Experimental results show that within the 0-20 mA current range, adjusting the angle alpha modifies the attenuation control precision, thereby enabling configurable dynamic ranges. Specifically, attenuation ranges of approximately 20 dB, 40 dB, and 60 dB are achieved at alpha = 0 degrees, 45 degrees and 90 degrees, respectively, allowing the device to be adapted to various application scenarios.
Keywords:
Optical attenuators
Optical fiber devices
Collimators
Optical coupling
Attenuation
Optical fiber couplers
Optical fiber theory
Optical fiber networks
Optical fiber amplifiers
Magnets
Variable optical attenuator (VOA)
fiber collimator
lateral displacement
precision-tunable
Journal
I
IF:
2.5
Papers:
273
Citations:
1.5W