What does a beam profiler do?

A beam profiler (beam analyzer, mode profiler) is a diagnostic device for laser beam characterization which can measure the whole optical intensity profile of a laser beam, i.e., not only the beam radius but also the detailed shape.

How is beam profile measured?

Devices which measure and analyze the spatial distribution of a laser beam are called beam profilers and come in many different types, each with its own advantages and challenges. The basic types include array-based or camera-based profilers, mechanical scanning apertures, knife-edge scanners, and other devices.

What is a co2 laser beam expander?

A beam expander is a two-or-more-element optical system that changes the beam’s size and divergence characteristics. Beam expanders have numerous uses. By expanding a beam prior to focusing, smaller focal spot sizes can be achieved. Beam expanders improve a beam’s collimation.

How is laser beam measured?

Rayleigh Length: The Rayleigh length (or Rayleigh range) of a laser beam is the distance from the beam waist (in the propagation direction) where the beam radius is increased by a factor of the square root of 2. For a circular beam, this means that the mode area is doubled at this point.

What is a laser profilometer?

Laser Profilometer It uses a combination of laser and accelerometer to measure the longitudinal elevation profile of the road for high degree accuracy at highway speeds. The profile is then analysed to calculate International Roughness Index (IRI) values for road surface.

What is the spot size on a CO2 laser?

The wavelength of CO2 laser is 10 micron (0.01 mm), therefore this is the smallest diameter of the circle it can be focused to.

What does a laser beam expander do?

Laser beam expanders increase the diameter of a collimated input beam to a larger collimated output beam for applications such as laser scanning, interferometry, and remote sensing. Contemporary laser beam expanders are afocal systems developed from well-established optical telescope fundamentals.

How do you test laser intensity?

Laser power can be measured using standard laser power meters; there are two main types: calorimeter and pyroelectric. Calorimeter power meters measure laser power using a timed exposure.

How is laser power calculated?

E = PPEAK x t. For example, an Excimer laser might have a 10 ns pulse width, energy of 10 mJ per pulse, and operates at a repetition rate of 10 pulses per second. This laser has a peak power of: PPEAK = 10 mJ / 10 ns = 1 MW, and average power of: PAVG = 10 mJ x 10 (1/s) = 100 mW.

What is the name of the machine that is used to measure the roughness of the pavement?

It is called MERLIN (Machine for Evaluating Roughness using Low-cost INstrumen- tation). The device can be used either for direct measurement or for calibrating response-type instruments such as the vehicle- mounted bump integrator.

How do I calculate my spot size?

Spot size is nothing but the radius of the beam itself. The irradiance of the beam decreases gradually at the edges. The distance across the center of the beam for which the irradiance (intensity) equals 1/e 2 of the maximum irradiance (1/e 2 = 0.135) is defined as the beam diameter.

How small can a laser beam be?

The size of a conventional laser is dictated by the wavelength of the light it uses, and the distance between the reflective surfaces can’t be smaller than half the wavelength of the light–in the case of visible light, about 200 nanometers.

How do you align a laser beam?

In order to correctly align the laser beam, you have to use the first mirror to align the closer target position and the second mirror to align the farther target position. Physically move both mirrors to get the laser beam onto a closer position. You may have to adjust the angles of the mirror slightly.

What is a beam profiler?

Laser beam profiler is an instrument that measures the spatial distribution of power in the cross section of a laser beam. World leader with the largest installed base of laser beam profiling. Spiricon-Photon provides a complete solution for your laser measurement needs from EUV-THZ(Far IR) and nW-KW.

How do I update the firmware of my beam profiler?

For beam profilers with FW 13.13 installed the firmware update dialog is supposed to pop up when you check the hot pixel correction in the software as described in the manual on page 61 and click “update Firmware”. I will contact you directly to check the error message which pops up in your case and how this can be solved.

What is the modecheck collimated CO2 laser beam profiling system?

The ModeCheck collimated CO2 laser beam profiling system accurately captures and analyzes industrial lasers of wavelengths around 10.6µm by sampling a percentage of the beam with a spinning mirror.

Is there a MATLAB example code available for beam profiler?

Unfortunately there is no MATLAB example code available so far but we have codes for other applications which can be converted with the beam profiler driver and commands to a beam profiler suitable application. We will contact you directly to provide you with more information how to do that in detail.