that are used in a multi cavity structure the more the phase will increase thus the multi cavity structure 41 can accommodate a larger range of phase as compared to a single cavity structure 0038 fig4 c shows a graph 54 associated with the delay of the multi cavity structure 41 the range of the delay as shown in graph 54 is between u2212 1 ps and u2212 50 ps in comparison to graph 38 of fig2 c the range of the delay of the multi cavity 41 is significantly larger then that of a single cavity structure the larger the number of optical cavities used in a multi cavity structure the larger the range of delay will be also graph 54 shows two minimum values at approximately 1 5499 u03bcm and 1 5501 u03bcm the graph 52 further shows the delay does not vary very much around the resonant frequency 0039 fig4 d shows a graph 56 associated with dispersion of the multi cavity structure 41 the range of dispersion as shown in graph 56 is between 700 and u2212 700 ps nm in comparison with fig2 d the multi cavity 41 has a larger range of dispersion also the dispersion varies from u2212 500 to 500 ps nm monotonically with the wavelength range of approximately 0 01 nm around the resonant wavelength of 1 55 u03bcm within the high transmission frequency range high dispersion also occurs the multi cavity.