Determining the wavelength of optical radiation

摘要: In a method and apparatus, ie. "wavelength meter", for determining the wavelength of optical radiation, eg. visible radiation is subjected to plurality wavelength-dependent phase modulators 11, 12. The have net effect which varies with zero at predetermined wavelength. modulation determined so as determine difference between its … may comprise different electrode designs 13, 14 15, 16 are located on silicon layer Lithium Niobate substrate into single-mode waveguide has been diffused. arrangement be used in fibre-optic gyroscope compensate changes temperature.