The Johansson fixed optical attenuator reduces the signal by 10 dB and is designed for single-mode fiber-optic systems. The SC/APC connector allows it to be connected between two connections of the same type, while its passive operation requires no power supply.

It is used to reduce high input levels and prevent downstream equipment from becoming saturated. Its operating range covers wavelengths from 1260–1650 nm.

• Type: Fixed optical attenuator
• Attenuation level: 10 dB
• Attenuation accuracy: ±0.5 dB
• Connector type: SC/APC
• Fiber type: Single-mode
• Operating wavelength: 1260–1650 nm
• Return loss: >65 dB
• Polarization-dependent loss: <0.2 dB
• Maximum optical input power: 200 mW
• Operating temperature: -40 to +85 °C