Abstract
Due to its large capacity and low latency, wavelength-division-multiplexed passive optical network (WDM PON) using self-seeded reflective semiconductor optical amplifier (RSOA) is an attractive, low-cost solution for mobile fronthaul/backhaul. However, multiple reflections in self-seeding cavity lead to reflective crosstalk, degrading its transmission performance. In this paper, reflective crosstalk in self-seeded RSOA under different bias conditions is experimentally characterized by its pulse response, and then novel feedforward and feedback approaches are proposed to suppress the reflective crosstalk in self-seeded WDM PON. Experimental results using a simple delay and differentiation method show significant reduction in the reflective crosstalk for self-seeded RSOA. With the proposed feedforward crosstalk cancellation, 2.5-Gb/s mobile backhaul using self-seeded RSOA achieves 1.7-dB performance improvement after transmission over 20-km single-mode fiber. In addition, low-cost bandwidth-efficient mobile fronthaul for 24 20-MHz LTE signals is demonstrated using a self-seeded RSOA with only 1.5-GHz bandwidth. With adaptive feedback crosstalk cancellation, the error vector magnitude for the received LTE signal after 20-km standard single-mode fiber transmission in the C-band is improved by 20%.
© 2015 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription