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The most familiar range is the visible spectrum – ranging from the short violet wavelengths to the the long red wavelengths. Most humans can see between 400nm and 700nm. Beyond the range of our vision exist shorter wavelengths of ultraviolet light, and longer wavelengths of infrared light. The higher the frequency of a photon, the more energy it has. World Star Tech carries laser diodes ranging from the ultraviolet 375nm to the infrared 1064nm.

The output power of a laser is the maximum power of the light exiting the the laser housing. All World Star Tech lasers have their output power rated after passing through any installed optical assemblies. The power is measured according to CDRH specifications.

Each laser is classified by measuring the amount of optical power that would enter a 7mm aperture located at a distance of 20cm from the laser source. Our line lasers have a lower classification rating because the laser power is spread along the length of the line, rather than focusing on a single small point.

Typical lifetime of laser diode modules are 25,000 to 50,000 hours. If the laser diode temperature rises beyond the maximum operating temperature the long-term performance may degrade significantly, up to and including complete failure. If the laser diode’s operating temperature is reduced by about 10 degrees, the lifetime will statistically double.

Laser module lifetime can be extended significantly by maintaining the case temperature at the low end of the operating temperature range. Heat sinks are recommended and must be used if the laser is operating constantly. Operating the laser modules at the low end of the recommended voltage range will also help to extend the lifetime of the laser.

The wavelength of a laser diode module shifts about 2 nm with every 10 degree rise in laser diode temperature.