3 × ONU No-Guard-Band Coherent OFDMA-PON Uplink Demonstration Using a Real-Time Transmitter With a Free-Running 100-kHz-Linewidth ECL

Author

Yoshida, Yuki ; Maruta, Akihiro ; Ishii, Kenji ; Onohara, Kiyoshi ; Akiyama, Yuji ; Noda, Masaki ; Nogami, Masamichi ; Koguchi, Kazuumi ; Mizuochi, Takashi ; Kitayama, Ken-ichi

Author_Institution

Grad. Sch. of Eng., Osaka Univ., Suita, Japan

Volume

33

Issue

8

fYear

2015

fDate

April15, 15 2015

Firstpage

1666

Lastpage

1674

Abstract

In this study, we demonstrate coherent OFDMA-PON uplink transmission experimentally using three optical network units including a 3-Gbaud real-time transmitter prototype. Cooperative digital signal processing at the ONUs and an optical line terminal enable no-guard-band subcarrier-based multiple access with free-running up to 100-kHz-linewidth external cavity lasers over a 40-km fiber link. In addition, we demonstrate the OFDMA-PON uplink with multiformatted and unequally-allocated subcarriers over up to 65-km link to verify the bandwidth flexibility of the proposed uplink. We then extend the experimental results to cases with >3 ONUs via numerical simulation.

Keywords

OFDM modulation; frequency division multiple access; numerical analysis; passive optical networks; signal processing; ONU no-guard-band coherent OFDMA-PON uplink demonstration; bandwidth flexibility; coherent OFDMA-PON uplink transmission; cooperative digital signal processing; external cavity lasers; fiber link; free-running ECL; frequency 100 kHz; multiformatted subcarrier; no-guard-band subcarrier-based multiple-access; numerical simulation; optical line terminal; optical network units; real-time transmitter; unequally-allocated subcarriers; Delays; OFDM; Optical network units; Optical transmitters; Prototypes; Real-time systems; Uplink; Optical coherent communication; Orthogonal frequency division multiple access (OFDMA); Passive optical network (PON); orthogonal frequency division multiple access (OFDMA); passive optical network (PON);

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2015.2390221

Filename

7012048