The Johansson 4060 is a fixed inline optical attenuator providing precisely 5 dB of signal reduction for single-mode fiber systems. It uses an SC/APC connector interface, making it directly compatible with the SC/APC ports found on optical nodes, amplifiers, and splitters in FTTH and CATV fiber distributions.

The 4060 is used where a moderate signal reduction is required to bring slightly overdriven input levels into the optimal operating range of downstream equipment, maintaining signal integrity without the cost of a variable attenuator.

Key Features

• Fixed 5 dB attenuation level with ±0.5 dB accuracy
• SC/APC connector on both ends for low-reflection termination
• Single-mode fiber compatibility across the full C- and L-band window
• Operating wavelength range of 1260–1650 nm covers all common FTTH and CATV wavelengths
• Return loss greater than 65 dB — minimises back-reflection into laser sources
• Polarisation dependent loss below 0.2 dB
• Maximum optical input power of 200 mW

Product Benefits

• Moderate 5 dB fixed reduction suits nodes where only slight signal correction is needed
• High return loss protects upstream laser sources from reflected signal damage
• Low polarisation dependent loss ensures consistent performance regardless of fibre orientation
• Compact inline form factor installs directly between any two SC/APC connections

Technical Specifications

• Attenuation Level: 5 dB
• Connector Type: SC/APC
• Cable Type: Single Mode
• Operating Wavelength: 1260–1650 nm
• Return Loss: >65 dB
• Attenuation Accuracy: ±0.5 dB
• Polarisation Dependent Loss: <0.2 dB
• Maximum Optical Input Power: 200 mW
• Operating Temperature: -40 to +85 °C

Why You'll Love It

• No power supply needed — passive device that installs in seconds
• Wide operating temperature range suits both indoor equipment racks and outdoor enclosures
• Pairs with the Johansson 4061 (10 dB) for flexible link budget adjustment
• SC/APC interface is the industry standard for low-reflection CATV and FTTH nodes