The Keysight 86120D Multi-Wavelength Meter is a precision optical instrument for measuring wavelength and power in single and multi-line applications across the 1270–1650 nm band. Built around a Michelson interferometer with integrated HeNe laser referencing, it delivers absolute wavelength accuracy of ±1.5 ppm (typical ±1 ppm at 15–35 °C) with 0.0001 nm resolution. The instrument completes measurements in 0.6 seconds and can resolve up to 1000 spectral lines, making it essential for DWDM system characterization, laser validation, and optical network diagnostics.
Technical Specifications
Wavelength Performance
• Range: 1270–1650 nm
• Absolute accuracy: ±1.5 ppm (±1 ppm typical, 15–35 °C)
• Resolution: 0.0001 nm
• Minimum resolvable line separation: 20 GHz
• Measurement units: nm, THz, cm⁻¹
Optical Power Measurement
• Best accuracy: ±0.6 dB
• Flatness: ±0.2–0.5 dB
• Linearity: ±0.3 dB
• Single-line sensitivity: −20 to −40 dBm
• Multiple-line dynamic range: 30 dB
• Maximum safe input: +18 dBm
• Return loss: 35 dB (standard connectors)
Performance & Speed
• Measurement cycle time: 0.6 seconds
• Warm-up time: 15 minutes to specified accuracy
• Maximum measurable lines: 1000
Optical Input
• 9 µm/125 µm single-mode fiber
– Key Features
• Narrowband and broadband measurement modes for precise and weighted-center wavelength analysis
• Built-in OSNR measurement for DWDM signal evaluation and BER performance analysis
• Fabry-Perot laser characterization: mean wavelength, peak wavelength, mode spacing, FWHM, peak amplitude
• Real-time wavelength and power drift monitoring with time-stamped data logging
• Delta modes: wavelength, power, and combined wavelength/power trending
– Typical Applications
• DWDM system testing and validation
• Laser wavelength and linewidth characterization
• Optical signal quality assessment
• Spectral line measurement in dense wavelength-division multiplexed networks
– Compatibility & Integration
• AC supply: 100, 115, 230, 240 V; 50/60 Hz
• Power consumption: 310 W
• Interfaces: LAN, GPIB, USB
• External monitors: SVGA and DVI
• Peripheral: PS/2 keyboard and mouse
