\documentclass{standalone}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[francais]{babel}
\usepackage{tikz}
\usetikzlibrary{calc,trees,patterns,positioning,decorations.pathreplacing}

\begin{document}

\begin{tikzpicture}

\tikzstyle{mirror}=[fill,pattern=north east lines,draw=none,minimum width=0.75cm,minimum height=0.3cm]

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\node[draw, rectangle, line width=1.5pt] (laser) {LASER};

\node[draw, rectangle, xshift=0.5cm, right of=laser] (aom1) {AOM1};
\draw [-,line width=2pt, red] (laser) -- (aom1);

%\node[draw=none, right of=aom1] (lp1) {|};
%\node[draw=none, above] (lp1l) at (lp1.north) {LP};

\node[draw, rectangle, right of=aom1, xshift=1em] (eom1) {EOM1};
\draw [-,line width=2pt, red] (aom1) -- (eom1);

\node[draw=none, right of=eom1] (l21) {|};
\node[draw=none, above] (l21l) at (l21.north) {$\lambda/2$};

\node[draw, rectangle, text width=0.2cm, text height=0.2cm, right of=l21] (pbs1) {};
\draw [-] (pbs1.south east) -- (pbs1.north west);
\draw [-,line width=2pt, red] (eom1) -- (pbs1);

\node[draw=none, right of=pbs1] (l41) {|};
\node[draw=none, above] (l41l) at (l41.north) {$\lambda/4$};

\node[draw=none, below of=pbs1, rotate=90] (l42) {|};
\node[draw=none, left] (l42l) at (l42.north) {$\lambda/4$};

\node [mirror, below of=l42] (M1) {};
\draw [-, line width=1pt] (M1.north east) -- (M1.north west);
\draw [-,line width=2pt, red] (pbs1) -- (M1);

\node [circle, draw, fill=black, above of=pbs1] (pd1) {};
\draw (pd1) ++(0:-.27) arc (0:-180:-.27);
\node[draw=none, left] at (pd1.west) {PD1};
\draw [-,line width=2pt, red] (pbs1) -- (pd1);

\node[draw, rectangle, right of=l41] (aom2) {AOM2};
\draw [-,line width=2pt, red] (pbs1) -- (aom2);


\node[draw, rectangle, right of=aom2] (fin) {};
\draw [-,line width=2pt, red] (aom2) -- (fin);

\node[draw, rectangle, yshift=-28em, below of=laser] (fout) {};

\draw [-,line width=2pt, red] ([yshift=-11em] M1.center)+(-0.5cm,0) arc (270:360+270:0.3) -- ([yshift=-11em] M1.center)+(-0.25cm,0) arc (270:360+270:0.3) -- ([yshift=-11em] M1.center) arc (270:360+270:0.3) -- ([yshift=-11em] M1.center)+(.25cm,0) arc (270:360+270:0.3) -- ([yshift=-11em] M1.center)+(.5cm,0) arc (270:360+270:0.3);
\draw [-,line width=2pt, red, rounded corners] (fin) -- ([xshift=3em] fin.center) |- ([yshift=-11em] M1.center) -| ([xshift=-3em] fout.center) -- (fout);

\node[draw=none, right of=fout] (l4p) {|};
\node[draw=none, above] (l4pl) at (l4p.north) {4\%};

%\node[draw=none, right of=l4p] (lp2) {|};
%\node[draw=none, above] (lp2l) at (lp2.north) {LP};

\node[draw, rectangle, right of=l4p] (eom2) {EOM2};
\draw [-,line width=2pt, red] (fout) -- (eom2);

\node[draw=none, right of=eom2] (l22) {|};
\node[draw=none, above] (l22l) at (l22.north) {$\lambda/2$};

\node[draw, rectangle, text width=0.2cm, text height=0.2cm, right of=l22] (pbs2) {};
\draw [-] (pbs2.south east) -- (pbs2.north west);
\draw [-,line width=2pt, red] (eom2) -- (pbs2);

\node[draw=none, right of=pbs2] (l43) {|};
\node[draw=none, above] (l43l) at (l43.north) {$\lambda/4$};

\node[draw=none, below of=pbs2, rotate=90] (l44) {|};
\node[draw=none, left] (l44l) at (l44.north) {$\lambda/4$};

\node [mirror, below of=l44] (M2) {};
\draw [-, line width=1pt] (M2.north east) -- (M2.north west);
\draw [-,line width=2pt, red] (pbs2) -- (M2);

\node [circle, draw,fill=black, above of=pbs2] (pd2) {};
\draw (pd2) ++(0:-.27) arc (0:-180:-.27);
\node[draw=none, right] at (pd2.east) {PD2};
\draw [-,line width=2pt, red] (pbs2) -- (pd2);

\node[draw, rectangle, right of=l43] (aom3) {AOM3};
\draw [-,line width=2pt, red] (pbs2) -- (aom3);

\node[draw=none, right of=aom3] (l23) {|};
\node[draw=none, above] (l23l) at (l23.north) {$\lambda/2$};

\node[draw, rectangle, text width=0.2cm, text height=0.2cm, right of=l23] (pbs3) {};
\draw [-] (pbs3.south west) -- (pbs3.north east);
\draw [-,line width=2pt, red] (aom3) -- (pbs3);

\node[draw=none, right of=pbs3] (l45) {|};
\node[draw=none, above] (l45l) at (l45.north) {$\lambda/4$};

\node [circle, draw,fill=black, above of=pbs3] (pd3) {};
\draw (pd3) ++(0:-.27) arc (0:-180:-.27);
\node[draw=none, right] at (pd3.east) {PD3};
\draw [-,line width=2pt, red] (pbs3) -- (pd3);

\node [circle, draw,fill=black, below of=pbs3] (pd4) {};
\draw (pd4) ++(0:-.27) arc (0:180:-.27);
\node[draw=none, right] at (pd4.east) {PD4};
\draw [-,line width=2pt, red] (pbs3) -- (pd4);

\node[draw=none, xshift=0.5cm, minimum width=1.2cm, right of=l45] (cav) {};
\draw [-] ([yshift=-0.25cm] cav.west) -- ([yshift=0.25cm] cav.west) -- ([xshift=0.1cm, yshift=0.25cm] cav.west) -- ([xshift=0.5cm, yshift=0.65cm] cav.west) -- ([xshift=1.5cm, yshift=0.65cm] cav.west) -- ([xshift=1.9cm, yshift=0.25cm] cav.west) -- ([xshift=2cm, yshift=0.25cm] cav.west) -- ([xshift=2cm, yshift=-0.25cm] cav.west) -- ([xshift=1.9cm, yshift=-0.25cm] cav.west) -- ([xshift=1.5cm, yshift=-0.65cm] cav.west) -- ([xshift=0.5cm, yshift=-0.65cm] cav.west) -- ([xshift=0.1cm, yshift=-0.25cm] cav.west) -- ([yshift=-0.25cm] cav.west);
\draw [-] ([xshift=0.1cm, yshift=0.25cm] cav.west) -- ([xshift=0.1cm, yshift=-0.25cm] cav.west);
\draw [-] ([xshift=1.9cm, yshift=0.25cm] cav.west) -- ([xshift=1.9cm, yshift=-0.25cm] cav.west);
\draw [-] ([xshift=0.5cm, yshift=0.65cm] cav.west) -- ([xshift=0.5cm, yshift=-0.65cm] cav.west);
\draw [-] ([xshift=1.5cm, yshift=0.65cm] cav.west) -- ([xshift=1.5cm, yshift=-0.65cm] cav.west);
\draw [-,line width=2pt, red] (pbs3) -- (cav);

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\node[draw, circle, minimum size=0.5cm, above of=pd1] (mix1) {};
\draw [-] (mix1.south west) -- (mix1.north east);
\draw [-] (mix1.south east) -- (mix1.north west);
\draw [->,>=stealth,line width=2pt,blue!40] ([yshift=0.3em] pd1.north) -- (mix1);

\node [circle, draw ,minimum size=.8cm, above of=mix1] (osc1) {};
\draw ([xshift=-0.3cm] osc1.center) sin ([xshift=-0.15cm, yshift=-0.15cm] osc1.center) cos (osc1.center) sin ([xshift=0.15cm, yshift=0.15cm] osc1.center) cos ([xshift=0.3cm] osc1.center);
\draw [->,>=stealth,line width=2pt,blue!40] (osc1) -- (mix1);

\node[draw, rectangle, right of=mix1] (pi1) {PI};
\draw [->,>=stealth,line width=2pt,blue!40] (mix1) -- (pi1);

\node [circle, draw ,minimum size=.8cm, right of=pi1] (osc2) {};
\draw ([xshift=-0.3cm] osc2.center) sin ([xshift=-0.15cm, yshift=-0.15cm] osc2.center) cos (osc2.center) sin ([xshift=0.15cm, yshift=0.15cm] osc2.center) cos ([xshift=0.3cm] osc2.center);
\draw [->,>=stealth,line width=2pt,blue!40] (pi1) -- (osc2);
\draw [->,>=stealth,line width=2pt,blue!40] (osc2) -- (aom2);

\node[draw, rectangle, above of=eom2, xshift=1em] (pi2) {PI};
\draw [->,>=stealth,line width=2pt,cyan!50!black] (pi2) -- ($(pi2 |- eom2.north)$) node [above right]{\textit{\tiny{T}}};

\node[draw, circle, minimum size=0.5cm, above of=pi2] (mix2) {};
\draw [-] (mix2.south west) -- (mix2.north east);
\draw [-] (mix2.south east) -- (mix2.north west);
\draw [->,>=stealth,line width=2pt,cyan!50!black] (mix2) -- (pi2);

\node [circle, draw ,minimum size=.8cm, left of=mix2, xshift=-1em] (osc3) {};

\draw ([xshift=-0.3cm] osc3.center) sin ([xshift=-0.15cm, yshift=-0.15cm] osc3.center) cos (osc3.center) sin ([xshift=0.15cm, yshift=0.15cm] osc3.center) cos ([xshift=0.3cm] osc3.center);
\draw [->,>=stealth,line width=2pt,cyan!50!black] (osc3) -- (mix2);
\draw [->,>=stealth,line width=2pt,cyan!50!black] ([yshift=0.3em] pd3.north) |- ([yshift=4em] mix2.north) node [below right]{\textit{RAM}} -- (mix2);

\node[draw, circle, minimum size=0.5cm] (mix3) at ([xshift=-4em, yshift=14em] $(pd4 |- osc3)$) {};
\draw [-] (mix3.south west) -- (mix3.north east);
\draw [-] (mix3.south east) -- (mix3.north west);
\draw [->,>=stealth,line width=2pt,blue!70!black] (osc3) |- ([yshift=-6em] mix3.south) -- (mix3);
\draw [->,>=stealth,line width=2pt,blue!70!black] ([yshift=-0.3em] pd4.south) |- ([xshift=3em, yshift=-2em] $(cav.east |- pd4.south)$) node [above left]{\textit{PDH}} |- (mix3);

\draw [->,>=stealth,line width=2pt,blue!50!cyan] (osc3) -- ($(osc3 |- pi2)$) -| ([xshift=-1em] eom2.north);

\node[draw,rectangle,align=center,minimum size=1.8cm] (c) at ($(mix3 -| M1)$) {PDH\\ controller};
\draw [->,>=stealth,line width=2pt,blue!70!black] (mix3) -- (c);
\draw [->,>=stealth,line width=2pt,blue!70!black] ([yshift=1.5em] c.west) -| (eom1);
\draw [->,>=stealth,line width=2pt,blue!70!black] ([yshift=-.5em] c.west) -| ([xshift=1em] laser.south) node [below right]{\textit{\tiny{PZT}}};
\draw [->,>=stealth,line width=2pt,blue!70!black] ([yshift=-1.5em] c.west) -| ([xshift=-1em] laser.south) node [below left]{\textit{\tiny{T}}};

\node [circle, draw ,minimum size=.8cm] (osc6) at ($(aom1 |- M1)$) {};
\draw ([xshift=-0.3cm] osc6.center) sin ([xshift=-0.15cm, yshift=-0.15cm] osc6.center) cos (osc6.center) sin ([xshift=0.15cm, yshift=0.15cm] osc6.center) cos ([xshift=0.3cm] osc6.center);
\draw [->,>=stealth,line width=2pt,blue!70!black] ([yshift=.5em] c.west) -| (osc6);
\draw [->,>=stealth,line width=2pt,blue!70!black] (osc6) -- (aom1);

\node[draw, circle, minimum size=0.5cm] (mix4) at ($(osc3 -| pd2)$) {};
\draw [-] (mix4.south west) -- (mix4.north east);
\draw [-] (mix4.south east) -- (mix4.north west);
\draw [->,>=stealth,line width=2pt,cyan!40] ([yshift=0.3em] pd2.north) -- (mix4);

\node [circle, draw ,minimum size=.8cm, above of=mix4] (osc4) {};
\draw ([xshift=-0.3cm] osc4.center) sin ([xshift=-0.15cm, yshift=-0.15cm] osc4.center) cos (osc4.center) sin ([xshift=0.15cm, yshift=0.15cm] osc4.center) cos ([xshift=0.3cm] osc4.center);
\draw [->,>=stealth,line width=2pt,cyan!40] (osc4) -- (mix4);

\node[draw, rectangle, right of=mix4] (pi3) {PI};
\draw [->,>=stealth,line width=2pt,cyan!40] (mix4) -- (pi3);

\node [circle, draw ,minimum size=.8cm, right of=pi3] (osc5) {};
\draw ([xshift=-0.3cm] osc5.center) sin ([xshift=-0.15cm, yshift=-0.15cm] osc5.center) cos (osc5.center) sin ([xshift=0.15cm, yshift=0.15cm] osc5.center) cos ([xshift=0.3cm] osc5.center);
\draw [->,>=stealth,line width=2pt,cyan!40] (pi3) -- (osc5);
\draw [->,>=stealth,line width=2pt,cyan!40] (osc5) -- (aom3);

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\draw [dashed,rounded corners,line width=2pt,green!80!black] ([xshift=-1em, yshift=1em] $(laser.west|-osc1.north)$) rectangle ([xshift=1.5em, yshift=-2.5em] $(fin.east|-mix3.south)$);
\node[draw=none, green!80!black, anchor=north west] at ([xshift=-1em, yshift=1em] $(laser.west|-osc1.north)$) {\textsc{Table 1}};

\draw [dashed,rounded corners,line width=2pt,orange] ([xshift=-1em, yshift=2em] $(fout.west|-osc4.north)$) rectangle ([xshift=5em, yshift=-1em] $(cav.east|-M2.south)$);
\node[draw=none, orange, anchor=south west] at ([xshift=-1em, yshift=-1em] $(fout.west|-M2.south)$) {\textsc{Table 2}};

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\draw [decorate,decoration={brace,amplitude=5pt},line width=1pt] ([xshift=0.5em] $(pbs1.south east -| M1.south east)$) -- ([xshift=0.5em] M1.south east) node [midway, right, align=left, xshift=0.5em] { \textit{Ref. arm}\\ \textit{Fiber Link}};

\draw [decorate,decoration={brace,amplitude=5pt},line width=1pt] ([xshift=0.5em] $(pbs2.south east -| M2.south east)$) -- ([xshift=0.5em] M2.south east) node [midway, right, align=left, xshift=0.5em] {\textit{Ref. arm}\\ \textit{Doppler}};

\draw [decorate,decoration={brace,amplitude=5pt},line width=1pt] ([xshift=-0.5em] $(osc1.north east -| aom2.north east)$) -- ([xshift=-0.5em, yshift=0.1em] aom2.north east) node [midway, right, align=left, xshift=0.2em] {\textit{Fiber}\\ \textit{Link}};

\draw [decorate,decoration={brace,amplitude=5pt},line width=1pt] ([xshift=-0.5em] $(osc4.north east -| aom3.north east)$) -- ([xshift=-0.5em, yshift=0.1em] aom3.north east) node [midway, right, align=left, xshift=0.2em] {\textit{Doppler}};

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\node[draw=none, rectangle, anchor=north west] (notes) at ([xshift=2em, yshift=1em] $(fin.east |- osc1.north)$) {
\begin{tabular}{|c|c|}
\hline 
\begin{tikzpicture}
	\draw [line width=2pt,blue!40] (0,0) -- (0.25,0);
\end{tikzpicture} & Compensated Fiber Link \\ 
\hline 
\begin{tikzpicture}
	\draw [line width=2pt,cyan!40] (0,0) -- (0.25,0);
\end{tikzpicture} & Doppler Cancellation System \\ 
\hline 
\begin{tikzpicture}
	\draw [line width=2pt,blue!70!black] (0,0) -- (0.25,0);
\end{tikzpicture} & Pound-Drever-Hall Lock \\ 
\hline 
\begin{tikzpicture}
	\draw [line width=2pt,cyan!50!black] (0,0) -- (0.25,0);
\end{tikzpicture} & RAM Cancellation System \\ 
\hline 
\end{tabular} 
};

\end{tikzpicture}
\end{document}