3.7.1 Camera Based Beam Near-Field Propagation Analyzer: M2
3.7.1.1 BeamSquared®
• ISO compliant• Automatically measure your beam quality in under 1 minutes• Tune your laser for best operation• Specifically developed for continuous usage• Unequaled accuracy using patented Ultracal™ Calibration• Long optical train & automatic attenuation adjustment• Flexible mounting configurations, install horizontal or vertically• Pulsed and CW for most beam diameters and powers• Compact and portable• Detectors from 266nm to 10.6µm
The BeamSquared® system is a compact and fully automatedtool for measuring the propagation characteristics of CW andpulsed laser systems from the UV to NIR to Telecom wavelengths.
Users can also measure wavelengths above 1.8 microns,
including CO2 and terahertz in manual mode (a bench set-up;
without the automated optical train) with a Pyrocam™ IV or IIIHR.
Our longer optical train and patented UltracalTM Calibration makes
BeamSquared the most accurate product on the market and is
ISO 11146 compliant. Its operational robustness and reliability
ensures continuous use applications in industry, science, researchand development.

Automatic M2 - at Production Speeds
The BeamSquared optical train uses a fixed position lenswith movable mirrors and camera. The mirrors that direct thefocused beam into the camera are moved to precise locations,translating the beam through the near field, the waist, andthe far field regions. All these measurements and translations,as well as incremental beam attenuation, are automaticallycontrolled by the BeamSquared software. Design improvementsin the BeamSquared system have decreased the measurement
reporting time by 2-3 times, making it possible to report M2 inunder a minute.

Manual M2

3.7.1.1

Beam Analysis

Manual mode is available for wavelengths greater than NIR, particularly Terahertz and above, and for beams that are too large or too small
for the BeamSquared optical system. Users are required to provide a manual translation/attenuation apparatus.

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Software Features
Features
Measurements

3.7.1.1

Beam Analysis

M2x, M2y, Kx, Ky, BPPx, BPPy
Width at waist Wx, Wy
Divergence angle Qx, Qy
Waist location Zx, Zy
Rayleigh X, Y
Astigmatism
Asymmetry ratio
Statistical results are available on all measurements
Supports both automated and manual runs
New Hardware
Camera Options include: SP920, Xeva, Pyrocam™ III HR or IV
RF Lens Reader• Lens must be present for operation• Lens configuration data stored with lens (Focal length, calibration wavelength, material, etc.)
Shutter only open when in live mode
Table and attenuator calibration at startup (homing before each run)Supports hardware Trigger
Faster run times than M2-200s
New Interface
Selectable theme colors
Splash screen with progress bar
2D display
Selectable Color Palette
Manual Cursor when not running (Cursor at centroid otherwise)
Caustic Display
Selecting individual frames
Auto Aperture
Exclude points from run
Run Info Display
Displays Caution Notice when beams are non-conforming: (too dark, too bright, misaligned, too large or too small)
Option to ignore misaligned beams
Editable Settings (Wavelength, Laser to box distance, Laser to lens and focal length in manual mode)
Calculations
Frame Results (Total, Min, Peak, % in Aperture, Avg Pwr Density, Beam Width, Centroid, Peak, Cross Sectional Area)
Laser Results (Waist Width, Divergence, Waist Location Rayleigh Length, M2, K, BPP, Astigmatism, Asymmetry)
After Lens Results (Waist Width, Divergence, Waist Location Rayleigh Length, Astigmatism, Asymmetry)
Effective Focal Length of lensFitted/Measured Divergence
Supported Beam Width calculations• D4 Sigma• Knife Edge 10/90 and Programmable• EPSA - Encircled Power Smallest Aperture (power in a bucket)
Multiple Runs
Result statistics
Progress IndicatorSingle Page Report
Setup informationResults
Statistics
Caustic chart
Logging/Export data.CVS FileJANUARY 1, 2020
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Accuracy by Design
Spiricon products are known for accuracy. Using our patented Ultracal calibration method, auto aperturing to exclude noise beyond thewings of the laser beam, and long optical path, assures the user of the most accurate measurements in the industry.

Designed by Our Customers
Guided by customer input from our widely deployed previous generation M2-200s system, Spiricon redesigned the BeamSquared® tomeet the challenging demands of the laser industry. The new BeamSquared system has significantly higher durability and operational
robustness for continuous use in a three shifts a day, seven days a week environment. The rigid baseplate and internal optics greatly
simplifies and reduces the time for initial set-up and alignment. The lens configuration data is now stored using an RF ID chip embeddedin the lens holder which is uploaded automatically by the BeamSquared system when the lens cartridge is inserted in the system,
eliminating the need for our customers to keep track of configuration file. Both novice and seasoned users will appreciate these newfeatures along with the time-tested excellence that Spiricon has provided over the years.

Measurements
BeamSquared measures propagation characteristics in both
the X and Y axes and displays the following parameters:• Waist diameters• Full angle Divergences• Waist locations		
• Rayleigh lengths• M2 or K and BPP factors• Astigmatism• Asymmetry
To optimize bench space,
BeamSquared can be mounted
either horizontally or vertically.
Laser beam input port is the same
dimension with either mounting
method, X = Y, and the same as
the M2-200s that it is replacing.

Main Screen Functions
This window displays quantitative measurements of the laser parameters. These include the X and Y
beam widths, M2 or K, the divergence angles, the Rayleigh range, and other parameters shown.

3.7.1.1

Beam Analysis

This window presents measurements ofbeam width vs. position for a given run.
After measuring a few points, the software
extrapolates a curve fit. The Xs and Ys
represent individual measurement points.
The solid lines present the best fit hyperbolaof the beam propagation equation to themeasured points. The M2 and other laserparameters are computed from the best fit
hyperbola since it provides a smoothing of
the data points.

232

This window displays the 2D or 3D beam profile of the currently measured point in the beam propagation
curve. This image enables visual intuitive verification of the beam profile behavior through focus. After each run
the user can click any individual measured point and observe the beam profile. Outlying or anomalous points
can be automatically or manually excluded from the curve fit calculations for more accurate results.

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Specifications

Damage limits (2)Optical limits
Wavelength range
Beam size

Minimum beam width
SoftwareBeamSquared Software
Environmental
Storage temperature
Storage humidity
Operating temperature
Operating humidity
Power requirements (3)Input voltage
AC Line current
Line frequency
PhysicalWeight
Dimensions
Ordering information
Part Number
Notes:

BSQ-XC130

BSQ-A

BSQ-PY-M

SP920
XC130
BeamSquared® software, software Pyrocam™ IIIHR or Pyrocam™ IV
license, and optical train,
Silicon CCD
InGaAs CCD
Software only, camera and opticalno camera included
train not included.
266 – 1100nm
900 – 1700nm
See individual camera data sheets
7.1mm x 5.3mm
9.6mm x 7.6mm
1624 x 1224
320 x 2564.4μm x 4.4μm
30μm x 30μm
60dB
68dB
15 fps100 fps
USB 2.0 and 3.0±5% typical, ±10% waist location and Rayleigh length typical<1 minute typical, depending on setup conditions and operating modeStandard C-mount, 90° camera on axis rotation
Step-motor driven ball screw
0.05mm
CE, China RoHS
266-440nm UV 500mm FL
430-700nm VIS 500mm FL
430-700nm VIS 400mm FL
650-1000nm NIR 400mm FL
1000-1700nm Extended NIR
400mm FL

1000-1700nm Extended NIR
400mm FL
650-1000nm NIR 400 FL

266-440nm UV 500mm FL
430-700nm VIS 500mm FL
430-700nm VIS 400mm FL
650-1000nm NIR 400mm FL
1000-1700nm Extended NIR
400mm FL

Nominally from ND 1.0 to ND 4.8. Actual values vary with wavelength.
0.15 mW/cm2 CW mode
1.0 µJ/cm2 pulse mode
Both of the above for an M2=1 @1064nm

100 mW/cm2N/A

N/A
Depends on type of the camera

See camera data sheets

266 to 1100nm
900 to 1700nm
BeamSquared Auto Mode 1mm – 10mm
Varies with wavelength, waist size, location, and M2

Depends on type of the camera

44µm

N/A

1.06 to 3000μm
Pyrocam IIIHR 0.8mm – 10mm max
Pyrocam IV 0.8mm – 20mm max
Depends on customer mechanics
and lens
800μm

300µm

Fast scan method (1 minute) for automatic (ISO) and manual M2 measurement-30° C to 65° C
95% maximum (non-condensing)
10° C to 40° C
95% maximum (non-condensing)

N/A
N/A
N/AN/A

90 – 264 V AC
1.6 A
47Hz to 63Hz

N/A
N/A
N/A

26 lbs. w/o camera
217.2mm X 459.5mm X 156.3mm

N/A
N/A

SP90502

SP90444

SP90445

SP90410(1) Different lenses are required for different wavelength regions, spot sizes and divergences, Additional lenses must be ordered separately.
(2) CCD cameras can be damaged by power in excess of 0.15 mW/cm2 or energy in excess of 1 μJ/cm2. BeamSquared 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.
(3) For the optical train only. The PC computer supplies the power for the system components, such as the CCD camera.

Beam Analysis

Attenuation range

BSQ-SP920

3.7.1.1

ModelGeneral
Camera modelSensor type
Wavelengths
Active area
Elements
Effective pixel
Dynamic range
Frame rate
Interface
Accuracy
Measurement cycle time
Camera attachment
Translation systemResolutionComplianceStandard optics
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Accessories Ordering Information
Item
BSQ-SP920-A
BSQ-Lens Kit 266-1550
BSQ-Lens Kit 650-1700
BSQ-Lens Kit UV 500mm
BSQ-Lens Kit VIS 500mm
BSQ-Lens Kit VIS 400mm
BSQ-Lens Kit NIR 400mm
BSQ-Lens Kit Extended NIR 400mm
BSQ-Lens Kit Extended NIR 600mm
BSQ/BGS-KEY
BSQ/BGP-KEY
BSQ SP300 to SP920 upgrade

Description
An SP920 camera licensed for BeamSquared®. Sold as an accessory for those also purchasing a BSQ-XC130Lens kit that includes 5 BeamSquared lenses: 500mm UV, 500mm VIS, 400mm VIS, 400mm NIR, 400mm XNIRLens kit that includes 2 BeamSquared lenses: 400mm NIR, and 400mm XNIR.
Single BeamSquared lens, 500mm focal length, A/R coated for 266-440nm
Single BeamSquared lens, 500mm focal length, A/R coated for 430-700nm
Single BeamSquared lens, 400mm focal length, A/R coated for 430-700nm
Single BeamSquared lens, 400mm focal length, A/R coated for 650-1000nm
Single BeamSquared lens, 400mm focal length, A/R coated for 1000-1550nm
Single BeamSquared lens, 600mm focal length, A/R coated for 1000-1550nm
Includes BeamGage Standard software license in addition to BeamSquared software license
Includes BeamGage Professional software license in addition to BeamSquared software license
Camera upgrade

10.80mm.425in156.26mm
6.152in
154.94mm
6.100in

217.17mm
8.550in

P/N
SP90521
SP90449
SP90450
SP90451
SP90452
SP90453
SP90454
SP90455
SP90485
SP90507
SP90508
SP9051181.58mm
3.212in81.58mm
3.212in

459.49mm
18.090in

4X 1/4-20 UNC.500in 12.70mm
Mounting Holes for Optional Leveling Feet

211.58mm
8.330in81.58mm
3.212in

80.52mm
3.170in173.48mm
6.830in211.58mm
8.330in

44.45mm
1.750in358.39mm
14.110in

127mm
5.000in45.09mm1.775in12.70mm.500in.500in 12.70mm
4X 1/4-20 UNC
Mounting Holes for Optional Leveling Feet

43.03mm1.694in
29mm
1.142in

127mm
5.000inOptional Base Clamps

81.58mm
3.212in34.10mm
1.343in

SP920 Camera

53.09mm2.090in

Alignment Tool

29mm
1.142in
355.60mm
14.000in

110.50mm
4.350in87.40mm
3.441in
XC130 Camera

34.10mm
1.343in
Alignment Tool

114.70mm4.516in

3.7.1.1

Beam Analysis

177.80mm
7.000in

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19.69mm.775in