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M2 Measurement SystemsAutomated real-time ModeScan 1780 and NanoModeScan, or manual M2 Wizard3 Ways to Measure M2 Instantaneously and Automatically with Real-Time ModeScan 1780 Automatically with NanoModeScan Manually with NanoScan, FireWire BeamPro, and USBeamPro using the M2 Wizard Photon has a number of solutions for the measurement of M2 ranging from simple manual processes to fully automated dedicated instruments. Depending on the frequency of the need to measure M2 of laser and laser systems, Photon has a system that will meet most needs, whether for research and development of new laser systems, manufacturing quality assurance, or maintenance and service of existing systems. Details Automated M2 Measurements Photon has two dedicated ModeScan instruments for automating the measurement of M2. Our newest is the ModeScan 1780 that measures the M2 Beam Propagation Ratio and all associated ISO 11146 parameters instantaneously in real time at video rates to over 20Hz. The measurement technique, patented by Photon Inc., uses 10 reflective surfaces to form simultaneous images of the propagating beam at 10 locations on a 12-bit CCD array camera. With all ten measurement positions acquired at once, the instrument is suitable for measurement of both CW and pulsed lasers down to single-shot rates. Beam diameters are obtained with NIST-traceable accuracy to better than 2% using the Photon Model 2512 12-bit FireWire BeamPro. This translates to M2 measurements with accuracy to better than 4%. The ModeScan 1780 is suitable for the measurement of lasers with wavelength of 250 to 1100nm. For lasers outside these wavelengths Photon has the NanoModeScan, which is also a dedicated, fully-automated turnkey M2 system using the NanoScan slit profiler to make the measurements either according to the ISO 11146 Method or a fully automated Rayleigh Method. Once set up, the system can make the entire M2 measurement in as little as 20 seconds. The dedicated NanoModeScan software reports the k factor (1/M2), the actual beam waist diameter and location, and the beam's Rayleigh range in addition to the value for M2 for each axis. The NanoModeScan can also determine the M2 using the Rayleigh Method as a fully automated process. By selecting the Rayleigh method, the ModeScan will find the waist and then the Rayleigh points for both axes. It will then report the propagation parameters as with the ISO method. This method is fully automated and requires no intervention from the operator, other than the initial set up and input of the wavelength and lens parameters. Manual M2 Methods In addition to the dedicated automated M2 instruments, the software for the NanoScan, the FireWire BeamPro, and the USBeamPro include an M2 Wizard, which makes performing M2 measurements manually simple and straightforward. Additional Information