In the laser utilities, a new function, get_STC, has been added to evaluate the STC parameters using the following formulas, with the laser envelope expressed as $a = a_0 e^{i\theta}$:
The temporal chirp is calculated through
$\Phi^{(2)} = \frac{4\phi^{(2)}}{4(\phi^{(2)})^2+\tau^4}$
Here $\tau$ is duration in s, and phi2 refers to group-delay dispersion $\phi^{(2)} $, and $\Phi^{(2)}$ can be calculated by $\frac{\partial^2 \theta }{\partial t ^2}$.
Similarly, the spatial chirp is tested through:
$\nu = \frac{4\zeta }{w_0^2\tau^2+4\zeta^2}$
Here $L_0$ and $w_0$ are the laser duration and laser waist respectively. $\zeta$ is zeta, and $\nu = \frac{\partial^2 \theta }{\partial t \partial r} $, where $r = xcos(\theta)+ysin(\theta)$ in 3d ($\theta$ is the direction angle of r on xoy plane).
Finally, the angular chirp term is tested through:
$\beta = \frac{p-\Phi^{(2)}\nu}{ k_0}$
with $p$ refering to the pulse front tilt $p = \frac{dt}{dr}$
PR Description
In the laser utilities, a new function,
get_STC, has been added to evaluate the STC parameters using the following formulas, with the laser envelope expressed as $a = a_0 e^{i\theta}$:phi2refers to group-delay dispersion $\phi^{(2)} $, and $\Phi^{(2)}$ can be calculated by $\frac{\partial^2 \theta }{\partial t ^2}$.zeta, and $\nu = \frac{\partial^2 \theta }{\partial t \partial r} $, where $r = xcos(\theta)+ysin(\theta)$ in 3d ($\theta$ is the direction angle of r on xoy plane).