There is plenty of BW available in the fiber. A nit, we don't use prisms to combine and separate the colors. We are getting more data in the fiber by increas

There is plenty of BW available in the fiber. A nit, we don't use prisms to combine and separate the colors. We are getting more data in the fiber by increasing the modulation complexity and by making advances in forward error correction. We are seeing FECs now that have 12.3dB gain and are approaching the Shannon Limit.