Mcqs Clouds

Which category/ies of wavelength division multiplexer comprise/s two 3dB couplers where the splitting of an incident beam takes place into two fiber paths, followed by the recombination with second 3-dB coupler?

A. Interference filter based devices

B. Angular dispersion based devices

C. Mach-Zehnder Interferometers

D. All of the above

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