Patent ID: 6724788
Filing Date: 2004-04-20
Classification: G02F,H01S

Abstract:
Method for generating radiation with stabilized frequency, comprising the steps of:providing laser light pulses with a repetition frequency fR, said pulses being generated with a mode-locked laser pulse generator and comprising a plurality of N frequency components fn with fn=n *fR+fO, wherein fO represents an offset frequency, said frequency components forming a comb with first and second different frequency portions fn,1=n1*fR+fO and fn,2=n2*fR+fO, respectively, with n, n1, n2=1, . . . , N, wherein each frequency component of said first and second frequency portions contains said offset frequency fO, and generating a primary light output with a non-linear optical component generating a plurality of frequency components fm,out=n1 *fR+fOâˆ’(n2*fR+fO)=(n1âˆ’n2)*fR corresponding to the difference of frequencies of said first and second frequency portions, said plurality of frequency components forming an output frequency comb, wherein said offset frequency is eliminated from said frequency output comb.