• Automatically measure your laser beam quality in under 2 minutes
  • Measure your beam waist position and width
  • Tune your laser for best operation
  • ISO compliant
  • Specifically developed for continuous usage
  • Unequaled accuracy using patented UltracalTM Calibration
  • Automatic attenuation adjustment
  • Pulsed and CW for most beam diameters and powers
  • Compact and portable
Ordering Info
Download Data Sheet.
watch the M² video
Watch the M² Demo Video
Not all commercial M² measuring instruments conform to the ISO 11146 method of employing a fixed position lens and moving detector. Instead, some manufacturers use a fixed position detector and a moving lens. If the laser beam is diverging or converging within the travel range of a moving lens, the reported M² value and other results can be significantly compromised. Spiricon's M²-200s Beam Propagation Analyzer is fully ISO 11146 compliant.
Automatic M2 - at Production Speeds
The M²-200s optical train uses a fixed position lens and camera. The mirrors that direct the focused beam into the camera are moved to precise locations, translating the beam through both the waist region and the far field regions. All these measurements and translations, as well as incremental beam attenuation, are automatically controlled by the M²-200s software. Software improvements in the M²-200s, including more efficient algorithm execution, has decreased the measurement reporting time by 2-3 times, making it possible to report M² in under two minutes.
Beam Propagation Analyzer: M2
Manual M2
Manual mode is available for beams that are too large or too small or at wavelengths outside the standard optical train.
Beam Propagation Analyzer: M2
Accuracy by Design
Spiricon products are known for accuracy. Using our patented Ultracal™ calibration method and auto apeturing, to exclude noise beyond the wings of the laser beam, you are assured of the most accurate measurements in the industry.
Designed by Our Customers
Spiricon has redesigned the M²-200, the world's top selling beam propagation system to include customer input, increased attention to durability, and operational robustness for continuous use applications; three shifts a day, seven days a week. Novice and seasoned users will appreciate these new features along with the time-tested excellence that the Spiricon M²-200 measurement system has provided over the years.
Main Screen Functions
Beam Propagation Analyzer: M2

Software 32/64 Bit Compatibility

Specifications for M²-200s
Accuracy ±5% typical, ±12% waist location and Rayleigh length typical (Note: Accuracy can be degraded by a variety of situations)
Measurement Cycle Time 2-3 minutes typical, depending on setup conditions and operating mode.
Camera Attachment Std C-mount, 90° camera on axis rotation
Translation System Step motor-driven lead screw
Translation Pitch 4 mm/rev optical pitch
Step Angle 1.8° (200 steps/rev)
Sample Range M² - 200 s 190 - 600 mm, typical
Camera Specifications (for GRAS20 camera)
Imager 1/1.8" CCD, 1600 x 1200 pixels
Dynamic Range 12 bit A to D
Frame Rates 7.5 FPS (at full resolution)
Pixel size 4.4um x 4.4um
Gain 0 to 25dB
Shutter Control Programmable from 110us to 70ms
S/N Ratio 59dB at min gain
Trigger Input Edge sensitive 3.3 / 5Vdc LVTTL / TTL (positive or negative, user programmable)
  Minimum pulse width 10us
Trigger Out External Trigger cable provided.
Voltage Requirement 3.3Vdc LVTTL, Programmable
Power Consumption Powered over Firewire Cable
Dimensions 44mm (1.74") wide, 29mm (1.14") tall and 66mm(2.6") deep
Mass 104g (3.7oz)
Storage Temperature -30°C to 65°C
Storage Humidity 95% maximum (non-condensing)
Operating Temperature 10°C to 40°C
Operating Humidity 95% maximum (non-condensing)
Power Requirements*
Line Voltage 95V AC to 250V AC
Line Frequency 47Hz to 63Hz
Maximum Power 4.5 Watts
* For the Optical Train only. The PC computer supplies the power for the system components, such as the CCD camera. An external power supply is provided for Laptop computer use.
Weight M²-200… 5.9 Kg (without camera)
Measurements M²x, M²y, Kx, Ky, BPPx, BPPy
(Statistical results Width at waist Wx, Wy
are available on Divergence angle qx, qy
all measurements) Waist location Zx, Zy
  Rayleigh X, Y
  Asymmetry ratio
Wavelength Range  
Different lenses are needed for different wavelength regions.
The M²-200s model include 3 standard lenses with nominal 300mm focal lengths. See below.
M²-200s-FW 266 - 587nm (included)
  400 - 750nm (included)
  650 - 1125nm (included)
  1000 - 1300nm (optional)
Attenuation Range Nominally from ND 0 to ND 4.8. Actual values vary with wavelength.
Beam Size 0.5mm - 10mmM   ²-200s
  varies with wavelength, waist size and location, and M²
Damage Limits¹  
Camera 0.15 uW/cm² CW mode for a 10 mm input beam diameter
  1.0 uJ/cm² pulse mode for a 10 mm input beam diameter
  Both of the above for an M² =1 @ 1064nm
¹ CCD cameras can be damaged by power in excess of 100 mW/cm² or energy in excess of 100 mJ/cm². The M²-200s employs a focusing optic. While it may be that the laser input power or energy measures well below this damage threshold, it can easily exceed these levels when focused onto the camera sensor. Use caution and error on the side of safety. CCD cameras can be costly to repair or replace.
Laser Beam Sampling Systems for Cameras
Model LBS-300-UV LBS-300-VIS LBS-300-NIR LBS-300-BB
Part No. SP90183 SP90184 SP90185 SP90186
Wedge Variable ND Filter kit N/A WVF-300 SP90195 WVF-300 SP90195 WVF-300 SP90195
Beam Dumps BD-040-A, SP90192 40 Watts Max Power, Air Cooled
BD-500-W, SP90193 500 Watts Max Power, Water Cooled
      Item Description P/N  
M2-200 Beam Propagation Analyzer  
  M2-200s-FW M2-200 software, software license, GRAS 20 Firewire camera, short optical train, automatic and manual operation, recommended for 266nm - 1064nm wavelengths. SP90144  
  M2-200s-FW-A M2-200 software, software license, short optical train, automatic and manual operation, recommended for 266nm - 1064nm wavelengths (GRAS 20 camera not included) SP90145  
  M2-200sM-FW Manual mode M2-200 software, software license, GRAS 20 Firewire camera, manual operation with a GRAS 20 Firewire camera (optical train not included) SP90146  
  M2-200sM-FW-A Manual mode M2-200 software, software license, manual operation with a Firewire camera (GRAS 20 Firewire camera and optical train not included) SP90147
  1000-1300nm lens Lens assy telecom, 300mn fl 11402-001
  Beam Profilers Beam Profilers Catalog
129 pages (6.46 MB )
  M2-200/200s-FW user guide M2-200/200s-FW user guide
158 pages (1.84 MB )