Which feature of nLight Silicon enables the creation of spectrally efficient super-channels?

Question

Options

• Asoft-decision FEC
• Btransmit wave shaping
• Cdigital-to-analog conversion
• Dcoherent reception

• A
  2% (1)
• B
  84% (43)
• C
  10% (5)
• D
  4% (2)

Explanation

Transmit wave shaping allows nLight Silicon to precisely sculpt the spectral profile of each optical subcarrier, suppressing out-of-band energy so carriers can be packed extremely close together without inter-channel interference - the defining characteristic of a super-channel. This is a transmit-side function that directly controls spectral occupancy.

Soft-decision FEC (A) improves error correction sensitivity and reach but operates on the coding layer, not the spectral shape - it doesn't compress how much optical spectrum a signal occupies.

Digital-to-analog conversion (C) is a hardware building block used to implement wave shaping, but DAC alone is just a conversion step; spectral efficiency comes from how the DAC's output is shaped, not the conversion itself.

Coherent reception (D) is a receive-side technique that enables advanced modulation and better sensitivity, but super-channel creation happens at the transmitter, not the receiver.

Memory tip: Think "shape to pack" - wave shaping literally molds the spectral footprint of each carrier so they can be packed tightly into a super-channel. If it's about creating (transmit) vs. recovering (receive), the answer is on the transmit side.

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