We demonstrate an all-optical label and payload separator based on nonlinear polarization rotation in a semiconductor optical amplifier. The proposed scheme uses a variable packet length composed of a label and payload information signal modulated intensity modulation and differential phase-shift keying (DPSK) format, respectively. The separation is obtained by using the payload signal itself, exploiting the DPSK feature of being power constant, as a pumping light source. Therefore, the proposed scheme is asynchronous and does not need an external control signal.
Vegas Olmos, J. J., Tafur Monroy, I., Turkiewicz, J. P., Liu, Y., & Koonen, A. M. J. (2005). Self-controlled all-optical label and payload separator for variable length bursts in a time-serial IM/DPSK scheme. IEEE Photonics Technology Letters, 17(8), 1692-1694. https://doi.org/10.1109/LPT.2005.850901