Wavelength of a Laser

Laser wavelength (λ - lambda) is the distance between repeating units of a propagating wave of a given frequency. That is, the laser wavelength is the length of a wave before it repeats itself and is usually measured in nanometers (nm) for radiation within the visible spectrum. Laser wavelength is an important specification of our lasers because laser wavelength determines the color. For example, our green lasers have a laser wavelength of 532nm. Our red lasers have a laser wavelength of 650nm.

Laser wavelength and laser frequency are related via a mathematical formula c = λ × f. c is the speed of light with a constant value of 3.00x10^8 m/s. λ or lambda is the laser wavelength. f stands for laser frequency. Looking at the equation, we see that if we know the wavelength of a laser, we can calculate the frequency and vice versa.