The wavelength of 655nm laser pointers use a deep red laser diode near the 650 nm(nanometers) wavelength. In the 21st century, diode-pumped solid-state (DPSS) red laser pointers emitting at 671nm became available. Although this wavelength can be obtained directly with an inexpensive red laser diode, higher beam quality and narrower spectral bandwidth are achieved through DPSS versions.
This red laser new design uses advanced circuits and components to eliminate unwanted variations in output. The module contains an industrial quality laser diode with built-in monitoring photodiode. An efficient processor controlled driver circuit is fully protected and matched to the 655nm laser diode. A single input allows the light intensity to be set using a simple resistor or voltage source. The output can be modulated rapidly with any arbitrary waveform.