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| -rw-r--r-- | isCavityStable.m | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/isCavityStable.m b/isCavityStable.m new file mode 100644 index 0000000..86dbd99 --- /dev/null +++ b/isCavityStable.m @@ -0,0 +1,19 @@ +function ret=isCavityStable (abcd_cavity) + % finds if a cavity is stable baced on its abcd matrix + % see eq.4 for stability condition + % doi:10.1088/1464-4258/7/1/002 + % http://dx.doi.org/10.1088/1464-4258/7/1/002 + + A=abcd_cavity(1,1); + B=abcd_cavity(1,2); + C=abcd_cavity(2,1); + D=abcd_cavity(2,2); + + u= (A+D+2)/4 + if ( (0 < u) && (u < 1) ) + ret = true; + else + ret = false; + end + +end |