Optical frequency ruler

摘要: The present invention relates to frequency rulers. At least one embodiment includes a mode locked pump source operated at pulse repetition rate, and output having carrier envelope offset frequency. A nonlinear optical system outputs ruler spectrum comprising individual modes. modes may be characterized by spacing which is an integer multiple of the rate distinct frequencies exhibit discontinuity across output. are substantially laser. One preferred doubled, doubly resonant, non-degenerate OPO (DNOPO), supercontinuum generation (SC) stage reference laser arranged downstream from Tm fiber-based source. plurality beat signals generated therefrom provide for stabilization system.