Patent ID: 6043883
Filing Date: 2000-03-28
Classification: G01J

Abstract:
A wavemeter for measuring a wavelength of a first optical beam, comprising:a first optical component which is arranged in said first optical beam or in a part of it and which generates a second optical beam with a first optical power, whereby said first optical power of said second optical beam depends on the wavelength of said first optical beam,a first power detector detecting the optical power of said second optical beam anda first allocator allocating a wavelength to said detected first optical power based on the dependency of the optical power of said second optical beam which is generated by said first optical component on the wavelength of said first optical beam to be measured,a second optical component which is arranged in said first optical beam or in a part of it and which generates a third optical beam with a second optical power, whereby said second optical power of said third optical beam depends on the wavelength of said third optical beam,a second power detector detecting said second optical power of said third optical beam,a second allocator allocating a wavelength to said detected second optical power based on the dependency of said second optical power of said third optical beam which is generated by said second optical component on the wavelength of said first optical beam to be measured,whereby said optical power generated by said first and second optical components oscillate periodically with increasing wavelength, andsaid third optical beam being retarded with respect to said second optical beam.