Abstract
We report a first experimental study of the simultaneous temporal and polarization-resolved dynamics of a 1550-nm vertical-cavity surface-emitting laser (VCSEL) subject to orthogonally polarized optical injection. A novel technique is used to reveal the behavior of both polarizations at the VCSEL's output. In general, the same type of dynamics can be seen in both polarizations of the fundamental transverse mode but with unequal intensity/modulation depth. We show that both polarizations exhibit period one and chaotic dynamics and reveal antiphase dynamics. These results offer promise for the development of dual-channel, anticorrelated periodic and chaotic-signal generators with a single VCSEL for use as oscillators or chaotic sources in present and future optical networks.
Highlights
A semiconductor laser under external optical injection can exhibit a wide range of nonlinear dynamics
In the present contribution we focus on the analysis of polarization-resolved dynamics induced in a 1550-nm vertical-cavity surface-emitting laser (VCSEL) subject to orthogonally polarized optical injection, whose optical spectrum exhibits two modes corresponding to the orthogonal polarizations of the fundamental transverse mode
The injection strength is defined as the injected power normalized to the power of the solitary VCSEL and the frequency detuning as the frequency difference between that of the externally injected signal and that of the resonance of the orthogonal polarization of the VCSEL
Summary
A semiconductor laser under external optical injection can exhibit a wide range of nonlinear dynamics (see, for instance, [1] and [2] for reviews). There have been many reports analyzing these dynamics in different laser structures, including edge-emitting devices such as Fabry–Perot [3] or distributed feedback (DFB) [4] lasers but in multisection lasers as well [5] and, more recently, in vertical-cavity surface-emitting lasers (VCSELs) [6], [7] (see [1], [2], and references therein) Of these VCSELs are very promising devices due to their inherent advantages such as on-wafer testing capability, reduced manufacturing costs, high-coupling efficiency to optical fibers, ease of integration in 2-D arrays, low threshold current, etc. In the present contribution we focus on the analysis of polarization-resolved dynamics induced in a 1550-nm VCSEL subject to orthogonally polarized optical injection, whose optical spectrum exhibits two modes corresponding to the orthogonal polarizations of the fundamental transverse mode
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