Anritsu ML910B Optical Power Meter

The Anritsu ML910B is a dual-channel optical power meter engineered for precision measurement across fiber optic systems and components. Its two independent input channels enable simultaneous data display and inter-channel processing, delivering the functionality of two separate meters in a single unit. The instrument supports seven types of optical sensors with any two connected simultaneously, providing flexible configuration for diverse measurement scenarios.

Wavelength-selectable operation from 0.38 to 1.8 µm enables direct absolute power readout. Relative measurement mode establishes reference values and displays power differences with 0.001 dB resolution, while feed-through sensor configuration cancels source fluctuations for stable optical loss characterization. Sensitivity reaches –90 dBm at 1.3 µm with ±5% accuracy at both 0.85 µm and 1.3 µm (–23 dBm reference).

The meter stores up to 3,000 measured values on demand, simplifying field operations. Internal calibration circuitry and automatic zero-point offset adjustment ensure measurement reliability. GP-IB control enables external averaging integration, and PC connectivity supports automated measurement sequences.

Display resolution spans 0.001 dB (relative), 0.01 dB (dBm), and 0.1–1% (Watts), with auxiliary bar-graph indication.

Technical Specifications

• Wavelength range: 0.38 to 1.8 µm


• Sensitivity: –90 dBm at 1.3 µm


• Measurement resolution: 0.001 dB (relative/DIFF mode), 0.01 dB (dBm display), 0.1–1% (Watts display)


• Accuracy: ±5% at 0.85 µm and –23 dBm; ±5% at 1.3 µm and –23 dBm


• Data storage: 3,000 measured values


• Dual independent channels with simultaneous display


• Internal calibration circuit with automatic zero-point offset adjustment

Key Features

• Two simultaneous input channels eliminate the need for dual-meter setups


• Seven compatible optical sensor types with dual-sensor connectivity


• Relative measurement mode (REL) with reference recall and full-range relative functions


• Feed-through sensor configuration for source-fluctuation cancellation in loss measurement


• Wavelength-direct readout for absolute optical power


• Inter-channel data processing capabilities

Interfaces & Integration

• GP-IB control for external averaging command


• PC connectivity for automated measurement routines

Typical Applications

• Optical network testing and maintenance


• Component optical loss characterization


• Dual-point power monitoring and comparison