LambdaMeter Laser Wavelength Measurement Device

The LambdaMeter laser intensity meter represents a significant advancement in real-time laser wavelength and power measurements. Using a multi-channel photodiode system, the unit provides accurate laser wavelength measurements combined with power measurements at a fraction of the cost of traditional spectrometers.
Using proprietary optical filtering techniques, the LambdaMeter laser intensity meter is able to resolve wavelength with +/-0.5nm accuracy and +/-0.01nm repeatability. High dynamic range is achieved using a transimpedance amplifier with five gain ranges and 24bit ADCs. Rock-solid stability and a reduced noise floor are realized via temperature stabilized detectors and optical filters.

Key Applications

  • Monochromator wavelength measurement
  • Real-time production testing for wavelength and amplitude
  • 940nm vcsel testing for facial recognition
  • LED device or wafer level test & characterization
  • Production line or laboratory us

• Sub-nanometer resolution and accuracy
• Works with both CW and pulsed lasers
• Built-in thermal regulation for long-term stability and low noise floor
• LambdaMeter application software is Windows compatible
• Data output via USB to Windows, macOS and Linux
• ASCII command set for simple device control
• 5 adjustable transimpedance gain ranges and 24-bit ADC
• On-board unit specific calibration data
• Wavelength range 365 to 1100 nm
• ISO/IEC 17025 accredited by NVLAP (NVLAP lab code 200823-0) for calibration accuracy

Accuracy Specifications

Spectral Range

365 nm to 1,100 nm     (Short Wave Infrared options possible)

Wavelength Absolute Accuracy

± 0.25 nm1

Wavelength Repeatability

± 0.01 nm

Irradiance Absolute Accuracy

± 1%

Irradiance Repeatability / Stability


Measurement Time

100 msec  

General Specifications

InterfaceUSB 2.0 type B connector

Interface Protocol

Simple ASCII commands

Supported Operating Systems

USB drivers for Windows, macOS, Linux via FTDI virtual COM port


Height 88 mm, Width 55 mm, Depth 56.57 mm

Input Voltage

100 – 240 VAC 50/60 Hz

(12V AC DC Power Adapter included)

Operating Temperature15°C – 35°C
Humidity< 85% RH, non-condensing

Specifications are subject to change without notice


1) 0.25 nm when calibrated with a known reference sample. ± 0.5 nm nominal.
Specifications are subject to change without notice.