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| -rw-r--r-- | gyro_cavity_modematch_demo.m | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/gyro_cavity_modematch_demo.m b/gyro_cavity_modematch_demo.m new file mode 100644 index 0000000..789a623 --- /dev/null +++ b/gyro_cavity_modematch_demo.m @@ -0,0 +1,64 @@ +%Permute all possible lens combinations out of set of lenses +% keep this list short - computation time goes as factorial of lens set size +%lens_set = [.125, 0.20, 0.75 ]; %Given lenses of unique focal lengths +lens_set = [0.025, 0.035, 0.05, .075, 0.10, .125, 0.150, 0.20, 0.25, 0.300, 0.50, 0.75, -.05, -0.10 ]; %Given lenses of unique focal lengths +lens_permutations = pick(lens_set,3,'or'); %3 lens solutions + +%Pre-defined Constants +lambda= .795e-6 ; %Wavelength of beam +extra_space = 0.05; % to allow lens holder placement + + +Ltot=0.63+0.055+0.09 ; %Length of optical system + +%% Fiber output parameters +r0= 1.0E+100 ; %Initial radius of curvature +w0= 5.65e-4 ; %Initial waist +x0= 0 ; %Starting position of beam +q0 = wr2q(w0, r0, lambda); + +%% this will be used to propagate beam in free space +dummy_lens.abcd = abcd_lens(inf); +dummy_lens.x = 10000; +dummy_optic = {dummy_lens}; + +%% Cavity parameters calculated by cavity_design_demo.m +Lcav = 0.8025; +zc = 0.5062; % with respect to front mirror +% cavity waist +wc=2.6732e-04; +rc=Inf; +% however this inside of the cavity so we need to propagate it to the front mirror +dist = Lcav - zc; +% calculate beam parameter at the front mirror +% watch out that indeed there is only free space +qf = gbeam_propagation ( dist, wr2q(wc, rc, lambda), 0, dummy_optic ); + +%% some parameters for visualizer and solution search +lens_width = .03; %Lens width +show_lens_width = 1; %Set to 1 to enable display of lens width on solution propagation plot +show_lens_position = 1; %Set to 1 to enable display of position of center of lens on solution propagation plot +display_prop = [show_lens_width, show_lens_position]; +n_truncate = 3; %number of digits in truncated solution +n_visualizations = 5; %number of best solutions to visualize +n_hist = 1000; %number of sample points in histogram +stability_max = 1; %max stability (y-axis) shown on energy vs. stability graph +self_flag = 0; %Set to 1 to use Self's gaussian beam propagation, otherwise set to 0 +%End list + +%q0=wr2q(w0,r0,lambda); %Calculate intial q +%qf=wr2q(wf,rf,lambda); %Calculate final q + +%Mode match +[ possible_lens_placement, initial_lens_placement, possible_lens_set, possible_sample_energy] = mode_match( q0, qf, Ltot, lambda, lens_permutations, lens_width, self_flag ); + +%Remove similar solutions +[ possible_lens_placement_uniq, possible_lens_placement, possible_sample_energy, possible_lens_set, index ] = remove_similar_soln( possible_sample_energy, possible_lens_placement, possible_lens_set, n_truncate ); + + +%Visualize solutions +pick_visualization( possible_sample_energy, possible_lens_placement_uniq, possible_lens_placement, possible_lens_set, index, n_visualizations, q0, qf, Ltot, lambda, lens_width, display_prop ); + +%Plot energy vs. stability for each solution +[stability] = stability_visualization( possible_lens_placement_uniq, q0, qf, Ltot, possible_lens_placement, possible_lens_set, lambda, n_visualizations, n_hist, index, self_flag ); +energy_vs_stability( possible_sample_energy, stability, index, stability_max) |