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Top rated fiber optic attenuators

AI-generated summary · updated July 23, 2026 · verify details before purchase.

  1. Best overall

    Thorlabs FST-1 0-30 dB Variable Fiber Optic Attenuator

    4.7/5 $350-$400

    High precision variable attenuator with wide dynamic range, ideal for research and development.

    • Wide dynamic range
    • Excellent accuracy
    • Compact design
    • Higher price
  2. Best high-end choice

    Newport 41-0231 0-30 dB Variable Fiber Optic Attenuator

    4.6/5 $750-$850

    Robust variable attenuator with motorized control and software integration for precision systems.

    • Motorized control
    • Software integration
    • High accuracy
    • Expensive
  3. Best mid-range

    Thorlabs FSA-4 3-30 dB Fixed Attenuator

    4.5/5 $180-$220

    Versatile fixed attenuator covering a wide attenuation range at a moderate price.

    • Wide range
    • Cost-effective
    • Easy to install
    • Limited to fixed values
  4. Best budget pick

    Thorlabs FSA-6 10 dB Fixed Attenuator

    4.4/5 $240-$270

    Compact 10 dB attenuator providing reliable attenuation for simple setups.

    • Compact
    • Reliable
    • Affordable
    • Single attenuation level
  5. Best mid-range

    Opto-22 OPA-4 0-30 dB Variable Attenuator

    4.3/5 $500-$600

    Variable attenuator with robust housing and high optical quality.

    • Durable housing
    • High quality optics
    • Variable range
    • Price higher than Thorlabs equivalents

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