SOA - NOLM in Reflective Configuration for Optical Regeneration in High Bit Rate Transmission Systems

TL;DR

This paper investigates a reflective SOA-NOLM device for optical signal regeneration, demonstrating its effectiveness in error-free 10 Gb/s transmission over 100,000 km with polarization insensitivity.

Contribution

It introduces a novel reflective SOA-NOLM configuration for optical regeneration and experimentally validates its high-performance capabilities in long-distance transmission.

Findings

Achieved 100,000 km error-free transmission at 10 Gb/s.

Demonstrated polarization insensitivity of the regenerative device.

Validated the regenerative performance with a dual-stage SOA setup.

Abstract

This paper presents a theoretical and experimental investigation of optical signal regeneration properties of a non-linear optical loop mirror using a semiconductor optical amplifier as the active element (SOA-NOLM). While this device has been extensively studied for optical time division demultiplexing (OTDM) and wavelength conversion applications, our proposed approach, based on a reflective configuration, has not yet been investigated, particularly in the light of signal regeneration. The impact on the transfer function shape of different parameters, like SOA position in the interferometer and SOA input optical powers, are numerically studied to appreciate the regenerative capabilities of the device.Regenerative performances in association with a dual stage of SOA to create a 3R regenerator which preserves the data polarity and the wavelength are experimentally assessed. Thanks to this complete regenerative function, a 100.000 km error free transmission has experimentally been achieved at 10 Gb/s in a recirculating loop. The evolution of Bit Error Rate for multiple pass into the regenerator and the polarization insensitivity demonstration to input data are presented.