How can you tell if a light-emitting polymer is lasing?
What is a Fiber Bragg Grating (FBG)? Describe three different ways of producing Fiber Bragg Gratings.
A waveguiding film is deposited on a glass substrate by spinning a 280,000
molecular weight polystyrene with a concentration of 10 ml of solvent / gram
of polystyrene at a speed of 3000 rpm for 40 s. The film is then annealed at
110◦C for 45 minutes. How thick is the film?
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