Laser Frequency Combs for Coherent Optical Communications
Artikel i vetenskaplig tidskrift, 2019

Laser frequency combs with repetition rates on the order of 10 GHz and higher can he used as multi-carrier sources in wavelength-division multiplexing (WDM). They allow replacing tens of tunable continuous-wave lasers by a single laser source. In addition, the comb's line spacing stability and broadband phase coherence enable signal processing beyond what is possible with an array of independent lasers. Modern WDM systems operate with advanced modulation formats and coherent receivers. This introduces stringent requirements in terms of signal-to-noise ratio, power per line, and optical linewidth which can be challenging to attain for frequency comb sources. Here, we set quantitative benchmarks for these characteristics and discuss tradeoffs in terms of transmission reach and achievable data rates. We also highlight recent achievements for comb-based superchannels, including >10 Tb/s transmission with extremely high spectral efficiency, and the possibility to significantly simplify the coherent receiver by realizing joint digital signal processing. We finally discuss advances with microresonator frequency combs and compare their performance in terms of flatness and conversion efficiency against state-of-the-art electro-optic frequency comb generators. This contribution provides guidelines for developing frequency comb sources in coherent fiber-optic communication systems.

wavelength division multiplexing

fiber-optic communication systems

Coherent communications

laser frequency combs

microresonator frequency combs

Författare

Victor Torres Company

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Jochen Schröder

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Attila Fülöp

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Mikael Mazur

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Lars Lundberg

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Òskar Bjarki Helgason

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Magnus Karlsson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Peter Andrekson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Journal of Lightwave Technology

0733-8724 (ISSN)

Vol. 37 7 1663-1670

Dark-Soliton Engineering in Microresonator Frequency Combs (DarkComb)

Europeiska kommissionen (EU), 2018-05-01 -- 2023-04-30.

Ämneskategorier

Atom- och molekylfysik och optik

Signalbehandling

Annan elektroteknik och elektronik

DOI

10.1109/JLT.2019.2894170

Mer information

Senast uppdaterat

2019-11-04