655nm Lasers

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 671 nm 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.