Wall plug efficiency¶
The internal wall plug efficiency (WPE) is calculated when Gain clamping occurs. It is defined as
(4.2.17)¶\[\begin{equation}
\eta_{\mathrm{WPE}}^{\mathrm{internal}}
=
\frac{P_{\mathrm{stimulated emission}} - P_\mathrm{absorption}}{UI},
\end{equation}\]
where \(U\) is — and \(I\) is the current. If the front mirror losses (FrontMirrorLosses) are specified, the external WPE is output as
(4.2.18)¶\[\begin{equation}
\eta_\mathrm{WPE}^\mathrm{external}
=
\eta_\mathrm{WPE}^\mathrm{internal}
\frac{\alpha_\mathrm{fm}}{\alpha_\mathrm{cavity}},
\end{equation}\]
where \(\alpha_\mathrm{fm}\) is the front mirror losses.
Note
The cavity losses (\(\alpha_\mathrm{cavity}\), CavityLosses) is related to the front mirror losses via
(4.2.19)¶\[\alpha_\mathrm{cavity}
=
\alpha_\mathrm{fm}
+
\alpha_\mathrm{bm}
+
\alpha_\mathrm{waveguide},\]
where \(\alpha_\mathrm{bm}\) and \(\alpha_\mathrm{waveguide}\) are the losses due to the back mirror and waveguide, respectively.
Note
Please check out an example of mid-infrared QCL results in Overview.