Advanced Optics

Few questions related to modal theory in fiber optics?

1) What conditions BETAm (propagation constant) needs to satisfy, to enable propagation of the mode (m-order, like in TEnm) through fiber?

2) If there is 10 modes (of all possible polarizations) which can propagate through the fiber, what LP modes are settling them?

3) What modes from question 2) were made from two hybrid modes (difference of the refraction indexes (core and cladding) are not infinite small)?

4) If somebody could put link to figure which shows distribution of electrical field of lowest even an highest odd mode in PLANAR waveguide in which 4 TE modes propagate.

5) Which of these (in 4. question) modes has grater confining factor, and why?

6) If thickness of the waveguide layer increases what happens to the 4. mode? Does its confining factor increase, or decrease?
If you want to write an equation, be free to write it in text mode (like in programming languages).
Thanks in advance!

Your question is not comprehensible as currently written. Please revise your question and add details for assistance.

For assistance with this homework problem and as a resource for future problems I recommend this excellent site. This site is for Physics students who are having difficulty solving homework problems, and for those students who want to challenge themselves with additional work.

http://www.physicstutor.com/

20mm MBAPC/AO (Advanced Optics)




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