High-Speed All-Optical Sampling Based on Nonlinear Polarization Rotation in a Semiconductor Optical Amplifier

Abstract

A novel all-optical sampling based on nonlinear polarization rotation in a semiconductor optical amplifier is presented. An analog optical signal and an optical pulses train are injected into semiconductor optical amplifier simultaneously, and the analog light modulates the output optical pulse through controlling the rotated angle of nonlinear polarization rotation of the optical pulse. Therefore, the sampling signals are delivered from the analog light to the optical clock pulses. The theoretical model is built up with polarization-dependent rate-equations. The experimental results at 40 GS/s demonstrate the feasibility of our proposed approach.

An all-optical Sampler for digitising Radio-over-Fibre transceivers

“…It demonstrates the reasonably linearity of the proposed o-Sampler to carry out the sampling process. The optical components required to set-up the circuit shown in Figure 2 are similar of those used in an optical sampler based on the nonlinear polarisation rotation [15,16]. In the present fibre-based scheme, none polarisationdiscriminator device is needed and only a single PC is required to set P T = 0 mW for P C = 0 mW.…”

“…Computer simulations [15] and experiments [16] on realtime sampling technique up to 40 GS/s based on the use of the nonlinear polarisation rotation in SOAs were demonstrated using 5 mW pump (control) power.…”

Nonlinear Polarization Rotation Characteristic Phenomenon in a Bulk Semiconductor Optical Amplifier

“…They proved extinction ratio increased 8dB contrast all-optical AND gate base on cross-gainmodulation. Due to the polarization rotation can induce the variety of output power, the polarization rotation combining other non-linearity effect can use in all-optical nonlinear regeneration [9] and all-optical sampling [10] and optical buffer [11] and optical data comparator [12]. Recently, with investigate deeply, the applications of SOA nonlinear polarization rotation at high-speed all-optical signal processing and all-optical logic are more and more widespread along with research deeply [13,14].…”