title: SSII cancellation in an EAM-based OFDM-IMDD transmission system employing a novel dynamic chirp model.
abstract: We develop a novel subcarrier-to-subcarrier intermixing interference (SSII) cancellation technique to estimate and eliminate SSII. For the first time, the SSII cancellation technique is experimentally demonstrated in an electro-absorption modulator- (EAM-) based intensity-modulation-direct-detection (IMDD) multi-band OFDM transmission system. Since the characteristics of SSII are seriously affected by the chirp parameter, a simple constant chirp model, we found, cannot effectively remove the SSII. Therefore, assuming that the chirp parameter linearly depends on the optical power, a novel dynamic chirp model is developed to obtain better estimation and cancellation of SSII. Compared with 23.6% SSII cancellation by the constant chirp model, our experimental results show that incorporating the dynamic chirp model into the SSII cancellation technique can achieve up to 74.4% SSII cancellation and 2.8-dB sensitivity improvement in a 32.25-Gbps OFDM system over 100-km uncompensated standard single-mode fiber.
authors: Department of Photonics, National Chiao-Tung University, Hsinchu, Taiwan.
authors: Dar-Zu
authors: DZ
authors: Hsu
authors: Chia-Chien
authors: CC
authors: Wei
authors: Hsing-Yu
authors: HY
authors: Chen
authors: Yi-Cheng
authors: YC
authors: Lu
authors: Cih-Yuan
authors: CY
authors: Song
authors: Chih-Chieh
authors: CC
authors: Yang
authors: Jyehong
authors: J
authors: Chen