CHIRP program

The scaling factor of a m.p. sequence depends on p (Haeberlen, 1976). A variation of p during the sequence therefore causes a chirp of each resonance. Our simulation program allows us to quantify this effect also. In Fig. 10 we show a simulated BR-24 spectrum of our model system that assumes an exponential power droop that amounts to no more than a 1% decrease of p after 100 BR-24 cycles, that is, after 2400 pulses. Note the asymmetry of the lines and the wiggles at their feet that are indicative of the chirp. In Section IV we present experimental m.p. spectra that display exactly these features. 

In practice, such mirrors are produced by evaporation techniques controlled by a corresponding computer program. In Fig. 6.33 the variation of the refractive index for the different dielectric layers is shown for a mirror with negative GDD, and in Fig. 6.34 the reflectivity and the group delay is plotted as a function of wavelength for mirrors with negatively and positively chirped graded-index profiles. In combi-... 

CHIRP Confidential Hazard Incident Reporting Program... 

---