4. Assume you have at $z = 0$ a Gaussian pulse with \\ $\Delta\tau = 4$ picoseconds how large must product $k''z$ be to widen $\Delta\tau$ by 2?
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When a pulse widens, it means that its duration increases. In this case, the pulse is assumed to be 4 picoseconds. So, widening by 2 means that the pulse duration will increase by 2 picoseconds. Now, let's consider the equation for pulse duration: pulse Show more…
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