Anritsu ML9001A Optical Power Meter

The Anritsu ML9001A is a single-channel optical power meter engineered for precise measurement across telecom bands and fiber applications. It delivers -100 dBm to +20 dBm measurement capability with ±5% accuracy at -23 dBm and ±0.15 dB linearity. The instrument spans 0.38 to 1.8 µm wavelength range and supports both continuous and modulated light measurement at 12 selectable frequencies including 270 Hz.

A 4-digit display presents data in W, W(rel), dBm, or dB(rel) units with manual or automatic ranging. Internal reflection suppression in optical sensors and interchangeable connector adapters minimize measurement error and enable flexible deployment. GPIB automation delivers 30 ms/point response speed - exceeding 50% faster than conventional automatic measurement - while a 1 V/full-scale recorder output provides linear power-proportional signals.

Automatic sensor calibration ensures accuracy across the specified wavelength range, making the ML9001A suitable for optical fiber loss characterization and optical device performance evaluation.

Technical Specifications

• Measurement range: -100 dBm to +20 dBm


• Accuracy: ±5% at -23 dBm


• Linearity: ±0.15 dB (referenced to -23 dBm)


• Wavelength range: 0.38 to 1.8 µm


• Display: 4-digit with selectable units (W, W(rel), dBm, dB(rel))


• Modulation frequencies: 12 frequencies including 270 Hz


• Response speed: 30 ms/point via GPIB


• Measurement modes: Continuous and modulated light


• Recorder output: 1 V/full-scale, linear to power level in watts


• Range select: Manual and automatic

Key Features

• Suppressed internal reflection in power sensors reduces measurement error


• Automatic sensor calibration within specified wavelength range


• GPIB interface for enhanced automation and 50%+ reduction in measurement time versus conventional methods


• Interchangeable optical connectors via adapter system


• Adjustable calibration coefficient

Typical Applications

• Optical fiber loss measurement


• Optical device performance evaluation


• Repeater maintenance and long-distance fiber loss characterization


• Multi-core fiber cable loss assessment

Compatibility & Integration

• Compatible with Anritsu optical power sensors including MA9612A (ultra-high sensitivity, 1.3 µm band, -100 to +3 dBm) and MA9611A


• Pairs with Anritsu Stabilized Light Sources (MG9001A, MG9002A) for configurable optical loss test sets