Burleigh WA-20 Wavemeter

The Burleigh WA-20 Wavemeter is a precision instrument for absolute wavelength measurement of continuous wave lasers across the ultraviolet to mid-infrared spectrum. Built around a scanning Michelson interferometer and an integrated HeNe laser wavelength standard, it delivers traceable measurements without external reference sources. The instrument automatically determines laser wavelength with high accuracy, making it essential for laser tuning, spectral characterization, and drift monitoring applications.

## Technical Specifications

• Wavelength Range: 0.4 µm to 4 µm (vacuum wavelength measured 0.4 µm to 1 µm)
• Measurement Principle: Scanning Michelson interferometer
• Internal Calibration: Built-in HeNe laser wavelength standard
• Accuracy (High Resolution, linewidth < 2 GHz): 0.4–1.0 µm ±0.001 nm; 1.0–4.0 µm ±0.004 nm
• Accuracy (Low Resolution, linewidth < 20 GHz): 0.4–1.0 µm ±0.01 nm; 1.0–4.0 µm ±0.01 nm
• Overall Accuracy: ±1 part in 10⁶
• Readout Precision: 0.001 nm (high resolution); 0.01 nm (low resolution)
• Display Update Rate: Every 1.6 seconds
• Power: 110 V, 50/60 Hz, 0.5 A
• Dimensions: 17" W × 12" D × 7" H
• Manufactured in the United States

## Key Features

• Automatic wavelength determination eliminates manual calibration overhead
• Dual accuracy modes accommodate narrow-linewidth (< 2 GHz) and broader-linewidth (< 20 GHz) laser sources
• Sub-picometer readout resolution in high-resolution mode
• Real-time display refresh every 1.6 seconds for dynamic measurements
• D-sub 25-pin connector for data output and system integration

## Typical Applications

• Laser wavelength verification and identification
• Single-frequency laser characterization
• Wavelength drift analysis and stability monitoring
• Laser tuning and optimization
• Spectroscopic and metrological calibration work

## Compatibility & Integration

Data output via D-sub 25-pin connector enables instrument integration into automated test systems and data acquisition setups.