Patent ID: 7061957

Claim:
A laser system comprising: a gain medium that emits light in response to an applied current; a wavelength selective reflector, in optical communication with said gain medium, configured to resonate said light that is emitted from said gain medium; and a chamber containing a set atmosphere, said chamber being optically coupled to said gain medium and said wavelength selective reflector such that said light that is emitted from said gain medium passes through said chamber, said set atmosphere having known optical properties, wherein said set atmosphere is a wavelength selective atmosphere; wherein said set atmosphere has known spectral features across a wavelength range of interest and further including: an optical power monitor, in optical communication with light that passes through said chamber, which measures optical power of said light; and a calibration system, in signal communication with said optical power monitor, which calibrates an output wavelength of said laser system in response to said optical power measurements.