How to connect the cables to the optical power meter

To measure optical power accurately, connect a reference or test fiber cable compatible with the meter and the device under test, using appropriate adapters and ensuring the fiber type matches the system.

Key Cables and Connections

1. Reference Cable or Patchcord
   • A known good fiber optic cable, often called a launch or reference cable, is connected between the optical source and the power meter when measuring source power or link loss .
   • The cable should match the fiber type (single-mode or multi-mode) and core size of the system under test .
2. Fiber Test Jumper
   • If the optical power meter interface differs from the network device (e.g., SC meter port and LC device), use a fiber jumper with the correct connectors (e.g., SC to LC) to bridge the connection .
   • Single-mode jumpers are used for single-mode fibers, and multi-mode jumpers for multi-mode fibers .
3. Mating Adapters
   • Adapters may be required to connect the meter to the reference cable or patchcord if connector types differ .
   • Ensure adapters are clean and compatible with the connectors to avoid insertion loss or inaccurate readings .

Setup Procedure

• Clean all connectors and adapters before connecting to the meter .
• Set the optical power meter to the wavelength of the source signal .
• Connect the reference cable to the source if testing source power, or disconnect the cable from the receiver if measuring received power .
• Attach the power meter to the end of the cable or jumper and read the optical power in dBm, mW, or µW .

Additional Tips

• Avoid bending fiber cables tightly to prevent stress loss .
• Regularly calibrate the optical power meter according to the manufacturer's instructions .
• Use single-ended or double-ended loss measurement methods depending on whether you are testing a patch cord or an entire fiber link . By following these guidelines, the optical power meter will receive the full optical signal, ensuring accurate and reliable measurements.