The stimulated photon echo process is governed by the following integral:
Depending on the types of programming pulses (pulses 1 and 2) and read pulses (pulse 3) different applications can be found. For instance if you have a data pulse followed by a breif pulse as programming and then read with a brief pulse you get a memory application.
You can do processing using the following pulse sequence.
One of the exciting things about the materials we work with is that we can continuously program the material and continuously read out. Here is the basic idea.
This continuous programming has potential applications in correlators and true time delay systems such as in steering phased array radar as shown below.
Click here to see some cool effects.