Sending lasers in a curve should be easy if you use circular polarization. /s

You would send to a satellite in view; my orbital dynamics are poor, but I think with the LEO orbits, you may need to relay in space for a cross ocean link, as it seems unlikely one satelite would have a view of both sides. But Telstar 1 and 2 were used for cross-Atlantic microwave relay with a single satellite in view at a time. Future Telstars were geostationary, because satellite tracking was a lot of work (and with only two satellites, service was intermittent as they were only in view for a portion of their orbits). I imagine satellite tracking for lasers is going to be very difficult as well.