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Part 5. Conclusions

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The Solver finds the following values:

• Distance between lenses x = 274.5 mm.
• Distance from source to first lens y = 225.4 mm.

Inspection of the graphs indicates that, as desired, the mode size is 2 mm and the distance to the waist is large, although not precisely 100 m.

The solution found is not the only condition in which the two lenses can satisfy the given criteria. This is mainly because the concept of a "collimated" beam is somewhat vague for Gaussian propagation.

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