A 40 Gb/s InP-monolithically integrated DPSK-demodulator enhanced by cross-gain-compression in an SOA

OPTICS COMMUNICATIONS

卷:340

Article

Bontempi, Francesca¹  Faralli, Stefano¹  Leijtens, Xaveer J. M.²  Bollk, Jeroen²  Stabile, Giampiero Conte¹  Andriolli, Nicola¹ 

[1] Scuola Super Sant Anna, I-56124 Pisa, Italy

[2] Eindhoven Univ Technol, COBRA Res Inst, NL-5600 MB Eindhoven, Netherlands

关键词: Integrated optics;    DPSK demodulation;    Signal regeneration;    Photonics;   

DOI  :  10.1016/j.optcom.2014.11.097

来源: Elsevier

【 摘 要 】

We fabricated and experimentally tested a novel monolithically integrated Indium Phosphide optical circuit for differential phase-shift keying demodulation, which is robust to noise degradations of the received signal. The circuit consists of a one-bit-delay interferometer that demodulates the incoming signal and a semiconductor optical amplifier where the constructive and destructive demodulated outputs synchronously counter-propagate experiencing a reshaping effect. The novel optical circuit has been fabricated for 40 Gb/s signals, and the amplitude signal restoration is demonstrated by comparing the obtained output eye diagrams with those of a commercial fiber-based demodulator. We find a net improvement in the signal to noise ratio when the circuit is fed with a noisy input signal. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

Free