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Variable Fiber Attenuator
Passive Components > Attenuator

Variable Fiber Attenuator

Variable optical attenuator for precise in-line signal level control.

PDR Variable Fiber Optic Attenuator (VOA) provides continuously adjustable attenuation up to 30 dB for single-mode and multimode fiber with accurate, low-loss performance across 1260–1650 nm for telecom, CATV, data center, and test applications.
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Technical Specifications

Attenuation Range0 to 30 dB (Typical)
Attenuation Accuracy± 0.5 dB
Resolution0.1 dB (Typical)
Insertion Loss≤ 1.0 dB
Return Loss≥ 50 dB (SM)
Wavelength Range1260 to 1650 nm
Connector TypeSC / LC / FC / ST
Fiber TypeSingle-mode / Multi-mode
Polarisation Dependent Loss (PDL)≤ 0.2 dB
Repeatability≤ ± 0.2 dB
Operating Temperature-20°C to +70°C
Storage Temperature40°C to +85°C
Durability≥ 1000 adjustment cycles

Key Features

  • Wide attenuation range of 0 to 30 dB with precise, continuous adjustment capability
  • High attenuation accuracy of ±0.5 dB for reliable signal level management
  • Low insertion loss of ≤ 1.0 dB to minimise signal degradation in the optical path
  • High return loss of ≥ 50 dB (SM) for excellent back-reflection suppression
  • Available in SC, LC, FC, and ST connector interfaces for universal compatibility
  • Supports both single-mode and multi-mode fiber types

Applications & Use Cases

  • Fiber-to-the-Home (FTTH) and Fiber-to-the-Building (FTTB) network power balancing
  • Telecommunications network testing, commissioning, and maintenance
  • Cable TV (CATV) and broadband infrastructure signal level optimisation
  • Data centre interconnects and optical link budget management