they claim to increase the speed to 500Mbps in 3-5 years. but femtosecond laser is not semiconductor. there is no exponential scaling law.

femtosecond laser has been running at 80MHz for decades, they cannot just talk to the laser manufacture and ask them casually to increase that to 500MHz or above. so, it is better to take a grain of salt of the claim speed can be increase to 500Mbps in 5 years.

The cost of the femtosecond laser also won't come down easily either. At $75k a pop for the laser alone, who can afford such technology?