ModeMaster PC M-Squared (M2) Beam Propagation Analyzer
ModeMaster PC M-Squared (M2) Beam Propagation Analyzer

ModeMaster PC M-Squared (M2) Beam Propagation Analyzer

Newest version of the ModeMaster line of M2 Laser Beam Propagation Analyzers. Key Features:

  • Measurement and display of CW laser divergence, M2 (or k) and astigmatism
  • Beam sizes 0.2 mm to 25 mm
  • Wavelengths from 220 nm to 15 mm
  • Determination of waist location and diameters (including D4s diameter) and Rayleigh range
  • Angular and translational beam-pointing stability

ModeMaster PC M-Squared (M2) Beam Propagation Analyzer

Coherent pioneered M2 beam propagation analysis with the ModeMaster system a decade ago. Now, Coherent introduces the ModeMaster PC, the newest version of the ModeMaster line of M2 Laser Beam Propagation Analyzers.

The ModeMaster PC combines all the ISO-compliant accuracy and powerful features for measuring M2 and other beam propagation analysis functions for CW lasers, with the added flexibility and value of using a personal computer to provide optimum user control, data processing, storage and results display.

The ModeMaster PC includes a universal serial bus (USB) control /interface console and Windows software for operation with the latest MS Windows-based PC computers supporting a USB interface (for Windows 98, Windows ME, Windows 2000, Windows XP, Windows 7, and Windows 8). The ModeMaster PC is also compatible with all existing ModeMaster systems, allowing current users to easily upgrade their system for use on a supported PC computer.

Please Note: This product is not RoHS compatible and cannot be sold into the EU.

Name ModeMaster PC System UV, Low-Divergence ModeMaster PC System, UV, High-Divergence ModeMaster PC System VIS Low-Divergence ModeMaster PC System, VIS, High-Divergence ModeMaster PC Control/Interface Console and Software
Description ModeMaster PC Scan Head, Mount, Control / Interface Console and Software for UV, Low-Divergence beams ModeMaster PC Scan Head, Mount, Control / Interface Console and Software for UV, High-Divergence beams ModeMaster PC Scan Head, Mount, Control / Interface Console and Software for VIS, Low-Divergence beams ModeMaster PC Scan Head, Mount, Control / Interface Console and Software for VIS, High-Divergence beams ModeMaster PC Control/Interface Console and Software
Accuracy - Beam Quality- M2 (%) ±5% ±5% ±5% ±5%
Accuracy - Beam Translation ±5% of waist diameter +0.1 mm ±5% of waist diameter +0.1 mm ±5% of waist diameter +0.1 mm ±5% of waist diameter +0.1 mm
Accuracy - Divergence (%) ±5% ±5% ±5% ±5%
Accuracy - Pointing Angle ±5% of divergence +0.04 mrad ±5% of divergence +0.04 mrad ±5% of divergence +0.04 mrad ±5% of divergence +0.04 mrad
Accuracy - Waist Diameter (%) ±2% ±2 ±2 ±2
Accuracy - Waist Location ±8% of input beam Rayleigh Range ±8% of input beam Rayleigh Range ±8% of input beam Rayleigh Range ±8% of input beam Rayleigh Range
Analog Output Detector signal output, 0-13V maximum. A/D Control signal out, 0-5V pulse. Trigger (syncs to drum rotation), 0-5V pulse. Detector signal output, 0-13V maximum. A/D Control signal out, 0-5V pulse. Trigger (syncs to drum rotation), 0-5V pulse. Detector signal output, 0-13V maximum. A/D Control signal out, 0-5V pulse. Trigger (syncs to drum rotation), 0-5V pulse.
Part Number 33-1843-000 33-2106-000 33-2221-000 33-2239-000 33-1710-000
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STANDARD CONFIGURATIONS
UV Low Divergence
UV High Divergence
VIS Low Divergence
VIS High Divergence
Catalog Number
33-1843
33-2106
33-2221
33-2239
Model MM
-1
-1S
-2
-2S
Spectral Range
0.22-0.68 µm
0.34-1.00 µm
Detector Type
Silicon
INPUT BEAM REQUIREMENTS AT TEST WAVELENGTH
Test Wavelengtha
351 nm
514 nm
Minimum Powerb
7.5 mWc
2.5 mWc
Maximum Powerb
10Wc
25Wc
Noise
<2% RMS and <5% peak-to-peak
Min. Divergence (mrad)
0.24
0.46
0.24
0.46
Max. Divergence (mrad)d
1.7
3.2
2.0
3.6
Max. Beam Dia. (mm)f
25
12
25
12

a. Wavelength-dependent quantities are input power levels, and minimum and maximum divergence (see notes b, e, f).

b. Power levels are proportional to the inverse of the spectral response of the detector. The silicon detector peaks at 900 nm and is at half peak sensitivity at 510 nm and 1050 nm. The germanium detector peaks at 1500 nm and is at half peak sensitivity at 1100 nm and 1650 nm. The pyroelectric detector has a flat spectral response.

c. These limits can be reduced by a factor of 10 (higher sensitivity) by user-removal of the light-restricting aperture in front of the detector.

d. The maximum divergence limit is fixed by the inability to accurately locate the internal waist when the internal beam diameter growth (over the span of the drum) is too slight. Limits shown are for M2 = 1 and test wavelength; limits scale as the square root of M2 (test wavelength).

e. Minimum divergence in this wavelength range scales as the square root of M2 (test wavelength).

f. Diameters are approximate; divergence takes precedence in choosing options. Refer to nomogram.

Selecting a ModeMaster PC System Configuration

The ModeMaster PC systems are available in eight standard configurations (all include scanning head, 5-axis mount, USB Control / Interface Console, cables, PC software and manual). These configurations provide measurement in four wavelength ranges with two divergence ranges (high divergence and low divergence) within each wavelength range. Use the following steps, along with the Selection Nomogram Chart and Configuration Table, below, to select a ModeMaster PC configuration.

  1. Choose between the four spectral ranges: UV (220-680 nm), VIS (340-1,000 nm), NIR (800-1,800 nm) and IR (1,800-15,000 nm).
  2. Determine the approximate divergence of your laser beam and use theSelection Nomogram (Divergence vs. Wavelength) Chart to select the low-divergence or high-divergence configuration.
  3. Confirm your beam size is < 25 mm diameter for the low-divergence configuration or <12 mm for the high-divergence configuration. ordered to change the configuration of a ModeMaster PC system to cover other ranges.
  4. Use the table below to determine the selected ModeMaster PC configuration part number and verify all other beam specifications.
  5. If more than one ModeMaster PC configuration is needed to cover all beam parameter ranges, optional Scanning Head Modular Components can be ordered to change the configuration of a ModeMaster PC system to cover other ranges.

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