AFL Noyes OPM4-4D SM MM Fiber Optic Power Meter

The AFL Noyes OPM4-4D is a handheld fiber optic power meter for precision optical power measurements and insertion loss testing on singlemode and multimode fiber networks. Field-deployable with rugged construction and backlit LCD display, it serves premises, telecom, broadband, and PON environments. Wave ID automation synchronizes with compatible AFL Noyes OLS light sources to detect and switch wavelengths without manual intervention, eliminating setup errors and accelerating test cycles.

The meter detects multiple test tones for fiber identification, stores optical references per calibrated wavelength, and delivers N.I.S.T. traceable measurements.

Technical Specifications

• Supported Fiber Types: Singlemode (SM), Multimode (MM)


• Calibrated Wavelengths: 850 nm, 980 nm, 1300 nm, 1310 nm, 1480 nm, 1490 nm, 1550 nm, 1625 nm


• Detector: Filtered InGaAs


• Measurement Range: +26 to −50 dBm


• Display Units: dB, dBm, µW, Watt; insertion loss in dB


• Accuracy Reference: 25°C, −10 dBm per N.I.S.T. standards


• Power Source: 2 × AA alkaline batteries; optional rechargeable NiMH pack or AC adapter

Key Features

• Wave ID: Automatic wavelength identification and switching with OLS series sources; supports simultaneous three-wavelength testing


• Tone Detection: Recognizes 270 Hz, 330 Hz, 1 kHz, and 2 kHz test signals for fiber identification


• Reference Storage: Maintains calibrated optical reference per wavelength


• Display: Dual-wavelength LCD, backlit for direct sunlight visibility. Shows power (dBm or µW), insertion loss (dB), calibrated wavelengths (nm), tone frequency (Hz), wavelength ID, and estimated battery life


• Connector Interface: Accepts Noyes thread-on style adapter caps (ordered separately); 2.5 mm universal adapter cap may be included


• N.I.S.T. Traceability: Ensures measurement integrity to national standards

Typical Applications

• Premises network installation and certification


• Telecom infrastructure testing


• Broadband network commissioning


• Passive Optical Network (PON) validation

Compatibility & Integration Automatic Wave ID functionality pairs with AFL Noyes OLS series light sources for synchronized wavelength control, reducing operator dependence and test time. Thread-on adapter interface accommodates standard connector types via separately ordered caps.