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#!/usr/bin/env pyscript
# $Id: fabry-perot_pdh.py,v 1.1 2006/03/01 15:13:16 paultcochrane Exp $
# a Fabry-Perot cavity in a Pound-Drever-Hall setup
# import the pyscript objects
from pyscript import *
# import the optics library
from pyscript.lib.optics import *
# set up some handy defaults
defaults.units=UNITS['cm']
# initialise a laser beam
beam = Group()
# the laser
laser = Laser(c=P(0,0))
# the EOM
eom = Modulator()
eom.w = laser.e + P(1,0)
beam.append(Path(laser.e, eom.w))
# the "west" mirror
mirror_w = Mirror()
mirror_w.w = eom.e + P(1,0)
beam.append(Path(eom.e, mirror_w.w))
# some free space
fs = FreeSpace()
fs.w = mirror_w.e + P(1,0)
beam.append(Path(mirror_w.e, fs.w))
# the "east" mirror
mirror_e = Mirror()
mirror_e.w = fs.e + P(1,0)
beam.append(Path(fs.e, mirror_e.w))
# set the colour of the beam
beam.apply(fg=Color("red"))
# collect all the objects together
fig = Group(
beam,
laser,
eom,
mirror_e, mirror_w,
fs,
)
# render the figure
render(fig,
file="fabry-perot_pdh.eps")
# vim: expandtab shiftwidth=4:
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