Multistabilities and symmetry-broken one-color and two-color states in closely coupled single-mode lasers
O'Brien, Stephen P.
American Physical Society
We theoretically investigate the dynamics of two mutually coupled, identical single-mode semi-conductor lasers. For small separation and large coupling between the lasers, symmetry-broken one-color states are shown to be stable. In this case the light outputs of the lasers have significantly different intensities while at the same time the lasers are locked to a single common frequency. For intermediate coupling we observe stable symmetry-broken two-color states, where both lasers lase simultaneously at two optical frequencies which are separated by up to 150 GHz. Using a five-dimensional model, we identify the bifurcation structure which is responsible for the appearance of symmetric and symmetry-broken one-color and two-color states. Several of these states give rise to multistabilities and therefore allow for the design of all-optical memory elements on the basis of two coupled single-mode lasers. The switching performance of selected designs of optical memory elements is studied numerically.
Injection-locking bistability , Semiconductor-lasers , Low-power , Synchronization , Memory , Dynamics , Breaking , Chaos , Condensed matter physics , All-optical memory , Bifurcation structure , Intermediate coupling , Light output , Memory element , Optical frequency , Single-mode lasers , Switching performance , Laser modes
CLERKIN, E., O'BRIEN, S. & AMANN, A. 2014. Multistabilities and symmetry-broken one-color and two-color states in closely coupled single-mode lasers. Physical Review E, 89, 032919. http://link.aps.org/doi/10.1103/PhysRevE.89.032919
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