1490nm of optical power meter

A 1490 nm optical power meter is used to measure the optical power of downstream signals in PON and FTTH networks, essential for installation, turn-up, and troubleshooting.

Purpose and Applications

The 1490 nm wavelength is commonly used in GPON and XGPON networks for downstream data transmission from the Optical Line Terminal (OLT) to Optical Network Terminals (ONTs) in fiber-to-the-home (FTTH) deployments. Measuring optical power at this wavelength ensures that the network delivers sufficient signal strength for reliable operation. It is particularly important during: Network turn-up: Verifying that the OLT and ONT are transmitting and receiving at correct power levels.

Troubleshooting: Identifying signal loss or degradation in the fiber link. Passive network qualification: Checking splitters and fiber segments before equipment installation. Features of 1490 nm Optical Power MetersModern optical power meters designed for 1490 nm often include: Multi-wavelength capability: Many meters also measure 1310 nm, 1550 nm, and sometimes 1577 nm, allowing comprehensive testing of PON signals.

PO

N selective measurement: Ability to selectively measure downstream (1490 nm) and upstream (1310 nm) signals simultaneously. Automatic wavelength recognition: Identifies the wavelength in the fiber and displays the corresponding power level. Calibration for specific wavelengths: Ensures accurate readings for 1490 nm signals.

Data storage and management: Some meters can store hundreds to thousands of measurements for reporting and analysis. Examples of 1490 nm Optical Power MetersMAY59 10G XGPON Optical Power Meter: Measures 1490 nm, 1550 nm, and 1577 nm signals, supports automatic wavelength recognition, and displays both linear (nW) and logarithmic (dBm) values.

AFL OP

M 5-4D: Handheld meter covering 850, 980, 1310, 1490, 1550, and 1625 nm, suitable for insertion loss measurements on single-mode and multimode fibers. 10G XGPON Optical Power Meter with FC/SC Adapters: Designed for FTTH network installation and maintenance, capable of identifying multiple wavelengths and providing power readings for each simultaneously.

Importance in PON Networks

Testing at 1490 nm is critical because PON systems transmit multiple wavelengths simultaneously.

A PO

N selective power meter ensures accurate measurement of the downstream 1490 nm signal without interference from other wavelengths, which is essential for maintaining network performance and verifying compliance with optical budgets. In summary, a 1490 nm optical power meter is a specialized tool for measuring downstream optical signals in GPON/XGPON networks, providing accurate, wavelength-specific readings for installation, troubleshooting, and network verification.