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Camera Beam Profiler

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CCD Camera Beam Profiler




  • Wavelength Range: 190 to 1100 nm
  • Beam Diameter: 30 µm - 6.6 mm
  • For CW, Pulsed Beams, and Single Pulses
  • Optional M² Extension Set

CCD Camera Beam Profiler

 

Beam Profiler Features

  • High Resolution: 1,360 x 1,024 pixels
  • Low Noise: S/N > 62 dB
  • 12 Bit CCD Camera
  • Large Windowless Sensor Area (8.8 mm x 6.6 mm) for Best Uniformity and Linearity
  • Full 2D Analysis of Complex Beam Profiles
  • User Calibratable Power Readout
  • Auto-Exposure from 20 µs to 1 s and Gain Control from 1x to 16x
  • Black Level and Ambient Light Compensation
  • For CW, Pulsed* Laser Beam, and Single Pulse Analysis
  • External Shutter Trigger Input
  • Optional M² Extension Kit for Automated M² Analysis

Software Features

  • Versatile Graphical Interface with Easy-to-Adjust Sub-Windows
  • Cross-Sectional X and Y Profiles at Adjustable Locations
  • 2D Power Density Diagram with Elliptical Beam Fit, Flexible 3D Graph
  • Total Beam Power Over Time Plots
  • Analysis of Centroid Position Drifts
  • Image and Text File Output with Sequential Saving Option (New)
  • Pass/Fail Analysis
  • Module for Automated M² Beam Quality Measurements
  • Hot Pixel and Ambient Light Corrections for Higher Accuracy (New)
  • Configurable Profile Colors (New)

The BC106 Series of camera-based beam profilers offers more details and true 2D analysis of the beam's power density distribution when compared to scanning slit profilers. This allows complex mode patterns (like flat top and donut) to be identified while optimizing the laser systems. The BC106-VIS is designed for use in the 350 - 1100 nm spectral range while the BC106-UV is meant for use with UV beams outputting between 190 and 350 nm. When used together with the BC1M2 Series M² Extension Set, an automated M² beam quality analysis system can be built. The BC106 ships with a versatile software and driver package. 

BC106 Series are suited for use with either continuous wave or pulsed* sources of any frequency. Several trigger modes allow flexible capturing of single pulses. A TTL input is provided for triggered single pulse detection up to a repetition rate of 50 kHz.

The BC100 Series of beam profilers incorporate a high-quality 12-bit CCD camera with a large windowless sensor chip (active sensor size: 8.8 mm x 6.6 mm) having a resolution of 1.4 Megapixel (1360 x 1024 px). Compared to lower priced CMOS profilers, the features of the CCD camera chip of this profiler offer the following advantages:

  • Excellent sensitivity and low noise
  • An enhanced global shutter efficiency for improved exposure accuracy and uniformity
  • Automatic dark level calibration for very stable dark currents independent of the device settings. This avoids recalibration of the dark level for each user setting.

An integrated filter wheel with 4 different high-quality ND filters allows the profiler to be adapted for use with beam intensities from µW to W. The BP106-VIS includes 10, 20, 30, and 40 dB filters and the BP106-UV includes 20 and 40 dB (Visible); 20 and 40 dB (UV). The internal SM1 (1.035"-40) thread of the additionally included adapter SM1BC allows direct connection to Thorlabs' lens tube system and mounting of optical components such as additional attenuation filters. The mounting adapter shields ambient light from the Beam Profiler Aperture which is advantageous in low power applications.

The integrated power meter can be user calibrated and is perfectly suited for simultaneous power and beam shape optimization without the need for an external power meter. A previously measured mean value of the ambient light intensity is subtracted from the measured value so as to compensate for ambient light. The Automatic Exposure and Gain Control feature adapts the camera settings to the actual beam intensity. The hi-speed USB 2.0 interface allows up to 10 full frames per second at full resolution. Measurements at higher frame rates can be achieved and transferred with reduced frame sizes, i.e. Region Of Interest (ROI).

*Damage threshold data is currently not available for our beam profilers. For use with pulsed lasers, we recommend the following procedure as a guideline for determining a safe upper limit: Set the beam profiler to the maximum integration time (i.e., set the exposure to 1 s). Slowly increase the power until your signal fills approximately 50% of the sensor's dynamic range. Multiply this power by a factor of 10. This is the safe upper pulsed power limit for the beam profiler.

ModelBC106-UVBC106-VIS
Wavelength Range 190 - 350 nm 350 - 1100 nm
Power Range 50 fW - 1 W 1 fW - 1 W
Attenuation Filters
(Nominal Values on Filter Wheel)
20, 40 dB VIS
20, 40 dB UV
10, 20, 30, 40 dB VIS
Beam Diameter 30 µm - 6.6 mm
Compatible Light Sources CW, Pulseda
Pulse Frequency 1 Hz - 50 kHz (Single Pulse Exposure),
Unlimited (Multi-Pulse Exposure)
  • Damage threshold data is currently not available for our beam profilers. For use with pulsed lasers, we recommend the following procedure as a guideline for determining a safe upper limit: Set the beam profiler to the maximum integration time (i.e., set the exposure to 1 s). Slowly increase the power until your signal fills approximately 50% of the sensor's dynamic range. Multiply this power by a factor of 10. This is the safe upper pulsed power limit for the beam profiler.
BC100 with windowless sensor



The CCD camera of the BC100 Series features a windowless sensor, which allows measurements without any intermediate optics. To access the sensor, the ND

 

 

M² Beam Quality Analysis Extension Set for Camera Beam Profilers

 

M² Extension Set Features

  • Fast and Accurate Beam Quality Measurements
  • Measures M², Divergence, Waist Diameter, Rayleigh Range, and Astigmatism
  • Compatible with CW and Quasi-CW Pulsed Laser Sources
  • ISO11146 Compliant
  • USB and Serial Interface
  • Available in 2 Different Lengths:
    • 150 mm Translation Path: BC1M2-150
    • 300 mm Translation Path: BC1M2-300

The optional BC1M2 Series M² Analysis Extension Set allows automated, motorized, computer-controlled M² analysis with our BC100 Series Camera Beam Profiler (sold separately). The Extension Set includes the motorized translation stage, plus mounting accessories to mount a BC100 Beam Profiler onto the stage. The set is available with two different travel lengths: 150, and 300 mm. The translation stage is controlled by the M² software module of the BC100 Series Camera Beam Profiler via RS232. A USB port can be used optionally with the included adapter. No additional driver is required. To build a complete system consisting of a BC106 Series Beam Profiler, a BC1M2 extension set, and accessories for beam alignment, please see the M² Set Config and the M2 Accessories tabs or consult the manual.

To truly characterize a laser beam, more than a single profile has to be measured along the propagation axis of the focused beam under test. According to the ISO11146 standard, 10 different z positions shall be taken. Approximately half of the measurements shall be distributed within one Rayleigh length on either side of the beam waist, and approximately half of them shall be distributed beyond two Rayleigh lengths from the beam waist. The BC1M2 Set can easily make all the required measurements.
During operation, the profiler is automatically moved, step-wise, along the beam path and analyses the beam at various positions. The beam quality is determined via curve fitting of the beam diameter versus profiler position. To perform the tests, the laser beam under test has to be aligned with the translation path of the stage and focused within a certain divergence angle. The divergence angle of unfocussed nearly parallel beams can be accurately determined by a Divergence Measurement, which is based on a linear curve fit.

The BC100 Series Beam Profiler and any other necessary components for beam alignment and adjustment have to be ordered separately. A power supply and serial cable are included with the extension set. Each BC100 Series Profiler includes a software package* with an easy to operate Graphical User Interface (GUI).

 

ABOUT US

Our Mission is to accelerate the advancement of optical technology for precision measurements and their applications from the table tops of research laboratories to standard use in communication and high technology industries. Our aim is to serve our customers. Our hope is to create a place for highly skilled people in an open environment

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