Re: Interesting post by godotiscoming in the Off topic forum

Aiming to become the global leader in chip-scale photonic solutions by deploying Optical Interposer technology to enable the seamless integration of electronics and photonics for a broad range of vertical market applications

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rogue

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Re: Interesting post by godotiscoming in the Off topic forum

in response to

Re: Interesting post by godotiscoming in the Off topic forum

fairchijisback

posted on Feb 24, 2020 06:43AM

FJ,

POET has stated they are targeting DR and FR "reaches" for 400G. So that means they are committed to PAM-4 optical modulation. Additionally, at least the FR requires forward error correction. So that is good in the sense that they are not just committing to the "easy" stuff.

One question is can POET support coherent? I can't see where they said they can or cannot.

To be considered coherent modulation means that you are tracking phase, in this case the phase of the lightwave itself. The long reach ZR spec requires this. I can't see anywhere POET has ever mentioned doing this version. As it is long reach this is probably a lower demand higher margin product.

FR spec...

http://www.100glambda.com/specifications/download/2-specifications/1-400g-fr4-technical-spec-d1p0