Add throughput for focused light section

throughput_for_focused_light.tex

@@ -1,2 +1,26 @@
 \section{Throughput for Focused Light}
-\label{sec:throughout_for_focused_light}
+\label{sec:throughout_for_focused_light}
+
+The ComCam throughput has been estimated in ugriz using FGCM and is discussed in detail in Sec.~\ref{sec:photometric_calbration}.
+
+\subsection{Collimated Beam Projector Status}
+
+The Collimated Beam Projector (CBP) and Ekspla tunable laser were both installed on the dome during the week of November 18. See Figs.~\ref{fig:cbp_1, fig:cbp_2, fig:laser} figThey will both be connected to ethernet and a laser interlock system will be installed. First photon from the CBP is projected for December 2.
+
+\begin{figure}
+  \includegraphics{throughput_for_focused_light_figures/cbp_on_dome_1.png}
+  \caption{Image of the CBP, which was installed on the dome on November 22.}
+  \label{fig:cbp_1}
+\end{figure}
+
+\begin{figure}
+  \includegraphics{throughput_for_focused_light_figures/cbp_on_dome_2.png}
+  \caption{Image of the CBP, which was installed on the dome on November 22.}
+  \label{fig:cbp_2}
+\end{figure}
+
+\begin{figure}
+  \includegraphics{throughputhroughput_for_focused_light_figures/laser_on_dome.png}
+  \caption{Image of the laser box, containing the Ekspla tunable laser, which was installed on the dome on November 21.}
+  \label{fig:laser}
+\end{figure}