Experimental Investigation of Link Impairments in Pilot Tone Aided Superchannel Transmission
Journal article, 2019

We investigate the performance of single-pilot-tone locked frequency comb-based superchannel transmission for distances up to 1200km. In our scheme, electro-optic transmitter and receiver combs are locked by leaving one of the transmitter carriers unmodulated and regenerating the receiver comb via optical injection locking. This approach significantly reduces carrier offsets and therefore leads to reduced digital signal processing complexity. We experimentally assess how transmission impairments such as noise added by optical amplifiers and fiber nonlinearities affect the quality of the comb regeneration. Our results show that while the operating conditions are more stringent at longer distances, the single pilot is robust to impairments. At optimal launch power, similar performance with respect to an intradyne receiver is observed, showing that the optical pilot tones can be co-transmitted with data channels even at distances spanning hundreds of kilometer. The total superchannel spectral efficiency (throughput), including the pilot tone and guardbands, is 9.6 bits/s/Hz (12 Tbit/s) after 480 km and 8.4 bits/s/Hz (10.5 Tbit/s) after 960km.

Coherent communications

analog optical signal processing

Author

Mikael Mazur

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Jochen Schröder

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Abel Lorences Riesgo

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Instituto de Telecomunicações

Magnus Karlsson

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Peter Andrekson

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

IEEE Photonics Technology Letters

1041-1135 (ISSN)

Vol. 31 6 459-462

Subject Categories

Telecommunications

Communication Systems

Signal Processing

DOI

10.1109/LPT.2019.2898008

More information

Latest update

7/8/2019 1