Laser Beam Attenuator

Laser beam attenuator enhanced version.

Laser beam attenuator.

The laser attenuator incorporates technology derived from a joint collaboration between edinburgh biosciences ltd and delta optical thin film a s. Motorized variable attenuator for femtosecond and nd yag laser pulses 990 0072m divides laser beam into two beams of manually adjustable intensity ratio separated by 68 angle large dynamic range tr. The laser attenuator allows user control of attenuation by combining the loma with a. Parts list the following components are used to.

Clear aperture 15 mm bandwidth up to 20 nm optimization reflection or transmission type configuration λ 2 zo waveplate 1x or 2x thin film polarizers. The attenuators are multilayer dielectric coated fused silica optics that allow a variation in the amount of the transmitted energy by controlling the beam s angle of incidence. To compensate the beam displacement generated by the dielectric filter a transparent second optic is also employed. Continuously variable attenuation and defined polarization for co 2 laser beams a proprietary lasnix design enables a near perfectly transmitting linear polarizer with 40 db rejection.

Our laser beam attenuators provide high resolution intensity control without introducing a gradient in the intensity distribution or a change in the beam propagation direction. The 248 nm attenuator can vary the output power from. The damage threshold will be reached at 5 6 w which is well above the specified power of 2 4 w at 800 nm. The variable attenuators provide highest reproducibility for laser processes.

Laser beam attenuator enhanced version. We also offer laser beam attenuation kits for ultrafast laser pulses. In the case of the mai tai femtosecond oscillator the beam diameter is 1 2 mm. The stabilization of pulse energies in production processes is their main use.

For example if the beam diameter is 1 mm the maximum laser power at the attenuator should not exceed 4 w. The ultrafast version of the attenuator is intended for laser pulses of 100 fs. The loma uses a wedge thin film coating design to control the intensity or power of the transmitted laser beam. It incorporates a rotating achromatic λ 2 phase waveplate and two high performance broadband 72 thin film polarizers that separate s polarized and p polarized beams in parallel directions.

Attenuator design allows to control the intensity between two exit beams over a wide dynamic range. Variable attenuators with ø 17 mm clear aperture composed of two thin film brewster type polarizers and a waveplate mounted into precision opto mechanics. In the continuously variable attenuator two polarizers can be set to continuously control the transmitted beam power and independently set its polarization. Beam attenuators are available for 193 nm arf and 248 nm krf excimer lasers.