bullet 21 were not injected into the central or input channel 17 then the light bullet 20 will not be deflected and it will exit the switch 30 through the central channel 41 for instance fig2 illustrates the light bullet 21 as being axially displaced above the light bullet 20 in this manner as the counter propagating light bullets 20 21 collide and attract each other the light bullet 20 is deflected upward into either of the lateral channels 39 or 40 if the intensity of the light bullet 21 is sufficiently high or is increased then it will cause the light bullet 20 to be deflected into the upper lateral channel 39 on the other hand if the intensity of the light bullet 21 is relatively low or is decreased then the light bullet 20 is deflected into the lower lateral channel 40 fig3 illustrates a similar process as that described above in connection with fig2 with the exception that the light bullet 21 is axially displaced below the light bullet 20 in this manner as the counter propagating light bullets 20 21 collide and attract each other the light bullet 20 is deflected downward into either of the lateral channels 42 or 43 if the intensity of the light bullet 21 is sufficiently high or is increased then it will cause the light bullet 20 to be deflected into the lateral channel 43 on the other hand if the intensity of the light bullet 21 is relatively low or is decreased then the light bullet 20 is deflected into the lateral channel 42 as such by controlling the position and intensity of the light bullet 21 it is possible.