An all-optical bit-error indicating scheme based on self-phase modulation and filtering

Experimental demonstration of an ultrafast all‐optical bit‐error indicating scheme

“…In this article, we experimentally demonstrate such a device. More precisely, based on the idea initially suggested by Oda and Maruta [4] and the related numerical investigation done by Zhang et al [3], we confirm that the nonlinear response of optical fibers combined with an adequate optical spectral filtering can provide an efficient way to discriminate well‐defined “0” or “1” bits of information from potential errors. We will first describe and illustrate the experimental set‐up and the principle of operation of the device that we have implemented.…”

“…The principle of the device can then be easily understood as follows [3,4]: by properly adjusting the peak power of the ''1'' bits so as to be close to the second minima of the TF, the pulses emerging from the bit error indicating scheme will have a very low output level. On the contrary, the pulses having a peak power that may lead to a detection error fall in the range neighboring the maximum of the TF.…”

“…that negatively impact the quality of service. In this context, any optical device that can highlight in real time the pulses responsible for detection error is highly desirable for improved fault management [2,3].…”

“…Colantonio et al [2] used nonlinear CAD approach to design broadband PA targeting frequencies of 0.8-4 GHz, which resulted in an average DE of about 50% with an output power higher than 32 dBm. A class J PA targeting 1.35-2.25 GHz (50%) was designed delivering 10-W output power with the DE of about 60-70% [3]. Although this amplifier operates over broad bandwidth with fairly good efficiency, there is no systematic methodology followed by the designer for broadband design.…”

Impact of amplitude jitter and signal-to-noise ratio on the nonlinear spectral compression in optical fibres

“…The x-intercept PC of the tangent to the TF curve at the working power Pin = 1.2 W satisfies the condition 0 < PC < 2 Pin [30], therefore the proposed device acts as an all-optical amplitude jitter magnifier at this power. It is also noteworthy that for an input working power of 3.2 W, the system exhibits the optical functionality of a bit-error indicating scheme [31,32]. In order to assess the regeneration capability of the device, we tested its operation with a RZ amplitude-shift keying pulse train modeled by a pseudorandom binary sequence of length 4096 bits.…”