Great presentation!

This is a very good talk! Great for explaining the exciting aspects of HCF. A good contender for sending to new students at undergrad level if they prefer to watch youtube videos.

Excellent talk! I'am an univarsity student from Bangladesh. For my final year thesis course I'm working with HCF. This video helped me a lot to understand HCF, thank you Mr Geoff Bennett.

excellent lecture and presentation I love it! thank you

great one

Hello, thank you for the video. What is the C and L band?

Interesting. I could see this being problematic for use in certain applications such as undersea cables. Imagine having a break in the cable and then high pressure sea water getting into the hollow core. That would be a nightmare. Also, might want to consider pumping a different gas in for below-freezing environments to mitigate ice crystals forming. Edit: he covers the undersea application.