English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Increased traffic demands globally and in particular in short-reach links indata centers will require optical communication systems to continue scaling atan accelerated pace. Nevertheless, energy constraints start to limit the bitrate that can be practically transmitted over optical systems both at theshortest distances in data centers and at the longest distances in ultra-longsubmarine links. Short-reach links in data centers face strict constraints onpower consumption, size, and cost, which will demand low-power solutions thatscale to bit rates beyond 100 Gbit/s per wavelength, while accommodatingincreased losses due to longer fiber plant, multiplexing of more wavelengths,and possibly optical switching. At the longest distances, submarine opticalcables longer than about 5,000 km face energy constraints due to power feedlimits at the shores, which restricts the electrical power available to theundersea optical amplifiers, ultimately limiting the optical power andthroughput per fiber. This dissertation presents strategies to mitigate theselimitations. For short-reach links in data centers, we propose low-powercoherent receiver architectures that completely avoid high-speedanalog-to-digital converters and digital signal processors. For long-haulsubmarine links, we demonstrate how optimizing the channel power allocationunder a constraint on the amplifier power maximizes the information-theoreticcapacity per fiber.

Spectrally and Power Efficient Optical Communication Systems