Ultra Low Noise Laser Diode Module, 635 nm, 5 mW, Circular Beam

Ultra Low Noise Laser Diode Module, 635 nm, 5 mW, Circular Beam

SKU 31-0144-000
UOM Each

Ultra Low Noise (ULN) diode laser modules are designed for applications that require extremely low noise or mode-hop-free operation. Sophisticated drive electronics are used to ensure low noise output. Typical RMS noise is less then 0.06% for detector bandwidth from 10 Hz to 10 MHz, with no warm-up time required. ULN is also speckle-free for vision applications. Buy ULN to improve your signal-to-noise, dynamic range and resolution.

Price $1,034.00 USD


ULN Series of laser diode modules feature an alternative solution to the mode-hop problem. Rather than regulate temperature, a special modulation is used to force the laser into a multi-longitudinal mode.

While a normal laser will operate in a single-mode longitudinal or oscillate between two strong modes, the modulation creates several modes of lower intensity. As the laser temperature increases, these modes move like a caterpillar across the wavelength spectrum. The movement does not allow abrupt changes, so the system operates as if there were no mode-hops.

The result is low RMS noise (~0.06%), which is stable over changes in temperature and the life of the diode laser module.

Features and Benefits

  • Ultra Low Noise (ULN)
  • RMS noise
  • Circular beam, 1mm
  • No mode-hop noise
  • No warm-up period
  • Wavelength of 635 nm with 5 mW output power
  • Includes Safety Shutter
  • Long lifetime
  • Includes Power Supply and North America Power Cord





1 Day Ship
Wavelength (nanometers)
Wavelength Color
Power (milliwatts)
Beam Type
Circular Beam
Beam Shape
Beam Diameter at 1/e² (millimeters)
RMS Noise (%) (20 hertz to 20 megahertz) Maximum
Spatial Mode