Low Noise Laser Diode Collimator LNC-56CR

Low noise laser diode collimators with elliptical beam profile and integrated electronics

Laser diode collimators transform the divergent light of a laser diode into a collimated beam, while maintaining the Gaussian intensity distribution and the elliptical intensity profile. From the two emission angles θ and θ|| of the laser diode and the focal length of the collimation optics, the orthogonal and parallel divergence angles and beam diameter can be determined, which are a function of the laser diode used for the collimation.

The new low noise laser diode modules from Schäfter+Kirchhoff have reduced power noise, reduced coherence length and low speckle contrast as a result of internal RF-modulation. The low noise (<0.1% RMS, @<1 MHz) and the mode-hopping free laser operation makes these laser diode modules ideal for particle measurements or advanced medical and biotechnological applications. Due to the reduced coherence length, speckle contrast might be lowered. This effect, however, becomes smaller for smaller spots.

Performance Features

  • Low noise laser module (<0.1% RMS,@<1 MHz)
  • Reduced coherence
  • Mode hopping free laser operation
  • Collimated laser beam [X6]
  • Gaussian intensity profile
  • Laser output power up to 43 mW
  • Integrated adjustable power control <1–100%
  • Laser wavelengths from 405 to 830 nm
  • External modulation: TTL up to 100 kHz and analog up to 100 kHz
  • Supply voltage: 5V DC


LNC-56CR, dimensions
Schäfter + Kirchhoff GmbH - specialists for optical sensors and measurement technology
Kieler Str. 212, D-22525 Hamburg, Tel. +49(0)40 85 39 97-0, Fax +49(0)40 85 39 97-79