M2 FocusGage – BA
- A unique instrument for measuring laser diodes, fiber optics & high divergence beams.
- Small & Large beam measurement at waist position, down to 10 microns.
- Extended wavelengths range up to 2.7 microns (2 versions – silicone & InGaAs)
The M² FocusGage-BA system is a high-precision, multi-axis knife-edge scanning laser beam profiler, designed to deliver accurate beam characterization for focused and collimated beams.
Main Applications:
- Laser Beam Quality Measurement – Enables precise M² beam mode analysis and beam waist characterization as per ISO/CD 11146 standards.
- Focused Beam Profiling – Measures critical parameters such as beam waist diameter, divergence, Rayleigh range, and beam propagation ratio (M²).
- Collimated Beam Profiling – Ideal for collimated beams in a wide range of optical setups.
- Research and Development – Suitable for scientific applications, laboratory environments, and industrial beam diagnostics.
The system is compatible with various detector heads, including Silicon, InGaAs, and UV-enhanced detectors, offering flexibility across wavelengths ranging from UV to NIR (190–1800 nm).
This manual provides step-by-step guidance on system setup, alignment, software installation, and operation, ensuring seamless integration and optimal performance.
For additional support, please refer to the BeamAnalyzer™ User Manual or contact Duma Optronics’ customer support team.

Specifications
Parameters | Value |
---|---|
Input aperture | 9 mm (max. beam size) |
Minimum focused beam size | 10 microns (Warning: Beam should be positioned within measuring range per attached drawing) |
Measuring Method | Tomographic Knife-edge beam reconstruction – see Tutorial Fundamentals of Laser Beam Measurements Mounted on an accurate 50 mm linear stage |
Measuring Parameters | Beam Size, Power, 2D – 3D Beam Profile specific location |
Beam Propagation Parameters | BPP over up to 50 mm range, M² and depth of focus along propagation direction, see Tutorial Fundamentals of M2 Beam Propagation |
Resolution | Better than 1 micron @ waist position |
Position Accuracy Measurement | Better than ±5 microns |
Optional | ND Filters according to application |
Spectral Range | 800 – 1800 nm (IR10 version) |
Beam Power Range | Up to 1W with appropriate filter CW Lasers only |
Number of Knife-edges | 7 |
Divergence Angle | Max. ± 35 degrees |
This is a software driver device that interfaces to any host PC computer, running under Windows Vista/XP/2000/7 (32 & 64 bit), via USB port.
Ordering Information
The measuring head is interchangeable with M2Beam and can be operated as a full system
(Silicone Version, for InGaAs version contact factory).
M2 FG/BA-VIS (350-1100 nm)
M2 FG/BA-IR (800-1800 nm)