EDIT: Version 4.8 now has an \optaom
component. Here is a simple example:
\documentclass[pstricks, margin=5pt]{standalone}
\usepackage{pst-optexp}
\begin{document}
\begin{pspicture}(3,2)
\pnodes(0,1.5){A}(3,0.5){B}(3,1.5){C}
\optaom[aomalign=symmetric](A)(B)(C){AOM}
\newpsstyle{Beam}{linewidth=5\pslinewidth, arrows=->}
\drawbeam[linecolor=red!50](A){}(C)
\drawbeam[linecolor=red](A){}(B)
\end{pspicture}
\end{document}

The old answer as reference:
Here are two use cases for an AOM, which work with \optbox
. To draw the refracted beam, you must interrupt the \drawbeam
at the AOM and restart.
If you want the code to reflect the logic structure, you just define your own \aom
with \newpsobject{aom}{optbox}{}
:
\documentclass[pstricks]{standalone}
\usepackage{pst-optexp}
\begin{document}
\begin{pspicture}(0.7,-0.5)(8.5,3)
\pnode(2,1){A}\pnode(7,1){B}\pnode([offset=2]B){C}
\pnode(8,0){D}\pnode(D|C){E}
\psset[optexp]{mirrortype=extended, optboxsize=1.2 0.7}
\newpsobject{aom}{optbox}{}
\optbox[position=start, innerlabel](A)(B){Laser}
\aom[innerlabel, position=0.2](A)(B){AOM}
\mirror(A)(B)(C)
\mirror(\oenodeOut{2})(D)(E)
\addtopsstyle{Beam}{arrows=->, arrowscale=1.5, linewidth=2\pslinewidth}
\drawbeam[beaminside=false]{1-3}(C)
\drawbeam{2}{4}(E)
\end{pspicture}
\end{document}

\documentclass[pstricks]{standalone}
\usepackage{pst-optexp}
\begin{document}
\begin{pspicture}(3,3.5)
\pnode(1,3.5){A}\pnode(1,1.5){B}\pnode(2,0.5){C}
\newpsobject{aom}{optbox}{}
\aom[label=0 0 . absolute, optboxsize=0.7 1.2](A)(B){AOM}
\optretplate[label=1 180](\oenodeOut{1})(C){$\lambda/4$}
\mirror[mirrortype=extended](\oenodeOut{1})(C)(\oenodeOut{1})
\addtopsstyle{Beam}{ArrowInside=->, arrowscale=1.5, arrowinset=0, linewidth=2\pslinewidth}
\drawbeam(A){1}\drawbeam{1-2}\drawbeam{3-2}
\end{pspicture}
\end{document}

Or do you have some special needs for the AOM regarding the automatic rotation, alignment, componente nodes, fiber AOM?
\mirror[mirrortype=semitrans]
or\transmissiongrating[gratingcount=0, gratingalign=center]
could provide a possibility.