OTOA-1000 – In-Line, Step-Variable, Singlemode Optical Attenuator

The Olson Technology, Inc. Model OTOA-1000 provides 1dB though 7dB of step-variable attenuation (i.e. at 1dB steps) for 1310nm signals via standard simplex 9/125 yellow nonplenum riser jacketed singlemode fiber cable. Results may vary with other wavelengths and types of fiber cable



  • Low-cost method for adding step-variable optical attenuation without interrupting connections
  • Passive device intentionally induces macrobend losses around a series of restrictive curvatures
  • Combination of 1dB, 2dB and 4dB “loops” provides step-variable attenuation from 1dBthru 7dB
  • Built-in strain-relief mechanismminimizes changes in attenuation over time and temperature
  • Ideally suited for single mode 1310nm applications, including:
  • Reduction of the optical signal at the receiver to attain the “sweetspot”
  • Optical receiver protection during initial optical transmitter turn-up
  • CATV/HFC video and high speed data distribution networks
  • PON (passive optical networks)
  • Laboratory testing


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