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Recently, I read an article on time reversed laser. I don't know why they call it a time reversed. I have a doubt that why they use two laser in the device. And what is an anti-laser? The device absorbs the particular frequency of light which means some energy is lost. What happens to the lost energy?

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@dmckee: I think we can't close the question as a duplicate of the third one ;-) – Waffle's Crazy Peanut Apr 9 '13 at 17:27

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