For PhD Topics - Optical/Digital

The tutors and mentors at the facility where the PhD in electronics is taking place are in the best position to advise.

It depends a lot on your interests, where you want to pursue your PhD, and what you plan to do with a PhD once you've gotten it - like work in industry or at a University or at a Research Lab. There are a number schools in the US that have long been specialized in optics including the Univ. of Arizona for classic optics, the Univ. of Central Florida for lasers, Kent State Univ. for LCDs, the Univ. of Rochester..., it would be a long list to show all the schools and all their fields of research - just for the US; there are many great schools in other countries too, needless to say. Pick a subject that interests you and google 'research into___' and see what schools show up.

You do not need the help of an anonymous forum. You need the help of a counselor.

Not knowing where you are, we have no way of knowing if you have already been in school for 5-6 years, or some other shorter period.

If, after going through two undergraduate programs, you have no idea what to study, how can you expect any meaningful guidance from total strangers?????

See a counselor.

I'd think you'd want to study "optical engg or in digital electronics" so get on with it.

Don't ask strangers to help you plan your life.

You're in a PhD program? I doubt that. I suspect that you are instead at the beginning of a long program and are prematurely worrying about how to end the program. By the time you complete enough of your studies to attempt a PhD thesis your initial views and ideas of what new research you will contribute will certainly have changed.

• OSE 6111 Optical Wave Propagation (3 credit hours)
• OSE 6115 Interference and Diffraction (3 credit hours)
• OSE 5203 Geometrical Optics and Imaging Systems (3 credit hours)
• OSE 5312 Light Matter Interaction (3 credit hours)
• OSE 6525 Laser Engineering (3 credit hours)
• OSE 6432 Guided Waves and Optoelectronics (3 credit hours)

• OSE 6234C Applied Optics Laboratory (3 credit hours)
• OSE 6455C Photonics Laboratory (3 credit hours)
• OSE 6526C Laser Engineering Laboratory (3 credit hours)
• OSE 6615L Optoelectronic Device Fabrication Laboratory (3 credit hours)
• Other graduate science and engineering labs may be taken with college approval.

• EMA 5610 Laser Materials Processing (3 credit hours)
• PHY 5455 Modern X-ray Science (3 credit hours)
• PHZ 5505 Plasma Physics (3 credit hours)

http://www.graduatecatalog.ucf.edu/programs/program.aspx?id=1364

Optical engineering and digital electronics literally cover dozens hundreds thousands lots of different research topics. For a partial list try an internet and patent search.

Pick something you are personally interested in, not something that is seen to be mainstream or that is easy to do to get a passing grade.

We could offer a suggestion but then we don't know if it is suitable for you, and do you really want to put, say, 'StinkyPete' down as a primary research reference source in your final paper?