We propose the design of an optical limiter based on a microelectromechanical systems deformable mirror. The design is based on aperturing focused light reflected out of an optically driven deformable mirror, deformed in a parabolic form. We derive an expression for the reflected light intensity, and we show that the reflected light saturates as a function of back illumination light intensity.

We analyze the beat noise cancellation in two-dimensional optical code-division multiple-access (2-D OCDMA) systems using an optical hard-limiter (OHL) array. The Gaussian shape of optical pulse is assumed and the impact of pulse propagation is considered. We also take into account the receiver noise and multiple access interference (MAI) in the analysis. The numerical results show that, when O...

Several channel interference cancelation techniques have been proposed in different journals aiming at lowering to asymptotic bit error floors in optical OCDMA systems. These interference cancellation techniques are classified into two groups. One is based on the use of properties of sequence codes and another is based on the use of non linear elements in OCDMA systems. Optical hard-limiter is ...

Optical limiters are nonlinear devices that feature decreasing transmittance with increasing incident optical intensity, and thus can protect sensitive components from high-intensity illumination. The ideal limiter reflects rather than absorbs light in its active (“limiting”) state, minimizing risk of damage to the itself. Previous efforts realize reflective (rather absorbing) were based on emb...

An all-optical plasmonic limiter based on a nonlinear slow light waveguide is proposed and numerically investigated for the first time. The results reveal that the slowdown factor can be tuned by the intensities of incident surface plasmon waves. In addition, the nonlinear slow light waveguide can be operated as a limiter, in which surface plasmon waves with low incident power intensities can t...

We report experimental results on a highly efficient optical limiter that uses a three-mirror, multipass ring configuration. The optical limiter's enhanced performance is based on the accumulative effect that is achieved when the laser beam passes through the sample several consecutive times. Its feasibility was demonstrated for media with different limiting action processes, namely, reverse sa...

Abstract. In this paper, performance of incoherent and asynchronous optical CDMA (OCDMA) systems employing “optical encoding” is investigated and the results are compared with the results obtained when the encoding is performed in electrical domain. These investigations are performed for receiver structures that employ a single hard limiter (SHL), a double optical hard limiter (DHL) and also fo...

In this paper, the nonlinear optical response of thermo-optic origin exhibited by series of Fuchsin dyes at low continous wave laser powers is studied in liquid and solid media and optical limiter action based on nonlinear refraction isdemonstrated.

In an optical multiple-access system, overall system throughput efficiency and significant implementation costreduction would be achieved if many users could access a common optical channel at any time without control among users. Recently one such scheme, an optical orthogonal code division multipleaccess system (OOCDMA), was introduced by Salehi et al. 111-[6] for the case of no noise. In thi...