There are a lot of microwave connections (E.G. 24Ghz, 5.7Ghz) that are in the unlicensed spectrum. We are using these extensively in our network. See https://en.wikipedia.org/wiki/ISM_band
Unlicensed, but not unregulated. There are very detailed limitations on transmitter/antenna powers in those areas, limitations that are very country-specific. The rules for laser, where they exist, are more akin to "don't burn our people's eyes".