Advantest Q8326 480nm-1650nm Optical Wavelength Meter

The Advantest Q8326 is a precision optical wavelength meter for direct measurement of laser and LED wavelengths across the 480 nm to 1650 nm range. Using Michelson interference with a He-Ne reference laser, it delivers ±2 ppm ±1 count absolute accuracy and supports display resolution from 1 nm down to 0.0001 nm. The instrument provides continuous sampling at 5 Hz with 0.2 sec measurement time, plus moving-average and deviation functions for signal analysis.

Technical Specifications

• Wavelength Range: 480 nm to 1650 nm


• Wavelength Absolute Accuracy: ±2 ppm ±1 count


• Wavelength Display Resolution: 1 nm to 0.0001 nm


• Frequency Range: 181 THz to 625 THz


• Maximum Input Level: +10 dBm


• Level Sensitivity: −15 dBm (480–600 nm), −25 dBm (600–1650 nm), −30 dBm (1200–1650 nm)


• Sampling Rate: 5 measurements/sec


• Measurement Time: 0.2 sec


• Input Voltage: 90 V to 250 V AC, 48 Hz to 66 Hz


• Power Consumption: 60 VA or below


• Laser Classification: Class 1

Key Features

• Moving-average function with count of 10 for signal smoothing


• Deviation measurement function referenced to standard values


• GPIB interface for instrument control and data logging


• Analog D/A conversion output standard


• Dual-fiber input support: 9/125 µm SM and 50/125 µm GI


• Horizontal-position operation with forced-air cooling

Typical Applications Optical communications systems, DWDM channel validation, laser oscillation-wavelength tuning and verification, LED spectral characterization, and frequency stability monitoring across the near-infrared and visible spectrum.

Compatibility & Integration GPIB connectivity enables integration into automated test environments. Analog output allows parallel data acquisition on external instrumentation. Requires 90–250 V AC supply, 48–66 Hz; operates to 2000 m altitude in pollution degree 2 environments with proper grounding.