We present a single longitudinal mode erbium-doped fiber ring cavity laser with a long-term mode-hop-free operation by employing sub-cavity tracking feedback control method. Continuous mode-hop-free ...

Movies are the perfect escape when you can’t get away – or when you’re looking for a little inspiration for your next adventure. These movies, which are guaranteed to stir up those feelings of ...

Even at peak visitor periods, the worst excesses can be avoided and you’re never more than a bridge away from secluded Venice ...