Question

Find the coherence time of this laser ? Write answer in ns.​

Answer 1

Answer:

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Answer 2

Explanation:

The most common way to measure the coherence length (or linewidth) of a laser is with an interferometer. The simplest interferometer that can produce zero length difference between its two paths is the Michaelson interferometer. The light from the laser is split into two paths in the directional coupler.