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.
