Alternate oscillations in semiconductor ring lasers.
We report on fabrication and characterization of single-longitudinal- and transverse-mode semiconductor ring lasers. A bifurcation from bidirectional stable operation to a regime with alternate oscillations of the counterpropagating modes was observed experimentally and is theoretically explained through a two-mode model. Analytical expressions for the onset and the frequency of the oscillations are derived, and L-I curves numerically evaluated. Good quantitative agreement between theory and measurements made over a large number of tested devices is obtained.
Sorel
M
M
Laybourn
P J R
PJ
Scirè
A
A
Balle
S
S
Giuliani
G
G
Miglierina
R
R
Donati
S
S