Gentec-EO releases M2 real-time measurement module

July 11, 2013
The Beamage-M2 uses Fabry-Perot optics to measure M2 factors in less than a second with no moving parts.

The Beamage-M2 uses Fabry-Perot optics to allow M2 factor measurement in less than a second with no moving parts. Standard features include OD 4 attenuation, ISO 11136- and 13694-compliant calculations, a complete software package, and a Rayleigh range of 50 micron at 6 mm.
Quebec, Canada

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Real-Time M2 Measurement

Quebec City, CANADA - Gentec Electro-Optics, Inc. (Quebec City, Canada), is proud to launch the Beamage-M2, its new Real-Time M2 measurement module for the Beamage-3.0. The Beamage-M2 module is unlike any other M2 device on the market, with its compact assembly that contains no moving parts, allowing for a fast and easy setup.

The Fabry-Perot Interferometer - M2 Measurements with no moving parts

To achieve M2 measurements, the system uses a completely passive optical approach. Inside the device, a Fabry-Perot interferometer made with a pair of partially reflective glasses is positioned in front of the sensor of the Beamage-3.0 camera with a convenient angle for the light to oscillate, thus creating time delayed slices. After these slices have landed on the sensor, each one a spatial cross section along the waist, the software simultaneously tracks and analyzes them for unparalleled speed of M2 calculation.

Intuitive Software

The M2 measurements are taken directly in our PC-Beamage-3.0 software. An easy step-by-step procedure is clearly indicated directly in the software and allows the user to get the fastest M2 measurement available. The ISO calculations give M2 values in both the X and Y axes. Thanks to the module having no moving parts and the lightweight software, the M2 measures are taken at a rate of 3 fps. The system also automatically detects the multiple beams, allowing for an easy setup. Once the system is calibrated, you can take as many measurements as you like, without moving any parts or modifying parameters.

ISO Compliant

The M2 factor can be considered as a qualitative indicator of beam quality. In other words, it is an indicator of closeness to an ideal Gaussian beam at the same wavelength in terms of propagation. It can be defined as the ratio between the beam parameter product (beam waist multiplied by divergence) of the measured experimental beam and the one of the ideal Gaussian beam. Since the ideal Gaussian beam diverges more slowly than any other shape, the M2 is always greater or equal to one. An M2 very close to 1 indicates an excellent beam quality. To conform to the ISO 11146 and 13694 standards, the software uses the second order spatial moments to compute the M2 factor. All the calculations are ISO compliant.

About Gentec Electro-Optics

Located in Quebec City, Canada, Gentec Electro-Optics is a leader in the laser measurement field with 40 years of experience. In 2000, Gentec Electro-Optics, Inc. was formed from Gentec, Inc. so that the focus was entirely on laser measurement. The company now manufactures a complete range of laser power and energy meters, beam diagnostics and diffractive optics. Since the acquisition of Spectrum Detector in June 2010, they have added many products to the range, including high speed 130 kHz joulemeters and a unique industry leading line of THz sensors and instruments. Gentec Electro-Optics is also known as the first worldwide supplier of large aperture calorimeters to measure the highest pulse energies. Their products are sold around the world, with distributors and representatives in over 35 countries.


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