Agilent / Keysight 86120D Multi-Wavelength Meter range: 700-1650 nm

The Keysight 86120D Multi-Wavelength Meter is a precision optical measurement instrument covering 700 nm to 1650 nm, delivering absolute wavelength accuracy of ±1.5 ppm (typical ±1 ppm within 15 °C to 35 °C) with measurement cycle times under 0.6 seconds. The meter simultaneously measures individual laser lines and multiple signals across DWDM, component testing, and fiber characterization applications. It resolves spectral features to 15 GHz minimum line separation and handles linewidths to 10 GHz in narrowband mode.

Power measurement accuracy reaches ±0.6 dB with selectable measurement units in nm (vacuum or standard air), cm⁻¹, and THz.

Technical Specifications

• Wavelength Range: 700 nm – 1650 nm (specified); 700 nm – 1700 nm (operating)


• Absolute Wavelength Accuracy: ±1.5 ppm typical, ±1 ppm within 15 °C to 35 °C


• Measurement Cycle Time: Less than 0.6 seconds


• Maximum Linewidth (Narrowband Mode): 10 GHz


• Minimum Resolvable Line Separation: 15 GHz


• Power Accuracy: ±0.6 dB calibration accuracy at ±30 nm from 780 nm, 1310 nm, and 1550 nm


• Power Flatness: ±0.2 dB (1200 to 1600 nm)


• Power Linearity: ±0.3 dB (1200 to 1600 nm)


• Polarization Dependence: ±0.6 dB (1200 to 1600 nm)


• Sensitivity: –25 dBm (800–1200 nm); –40 dBm (1200–1600 nm); –30 dBm (1600–1650 nm); –20 dBm (700–900 nm)


• Selectivity: ≥100 GHz at 25 dB spacing; ≥25 GHz at 10 dB spacing


• Broadband Mode: Supported

Key Features

• Fast sub-0.6-second measurement cycles enable high-throughput production environments


• Supports both narrowband and broadband measurement modes


• Selectable output units: nm, cm⁻¹, THz


• Operating range extends to 1700 nm

Typical Applications

• DWDM system verification and channel power analysis


• Optical component testing and characterization


• Fiber laser and narrow-linewidth source measurements


• Multi-signal analysis across telecom and datacom wavelengths

Compatibility & Integration

• Connector options include FC/PC, FC/APC (narrow key), E-2000, SC, LC, MU, ST, and DIN (order separately)


• Operating temperature: 0 °C to +55 °C


• Humidity rated to 95% maximum


• Altitude operation to 2000 meters