| 21. | This is required by the reversibility ( or unitarity ) of the quantum evolution of the beam splitter.
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| 22. | Beam splitters with single mode fiber for PON networks use the single mode behavior to split the beam.
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| 23. | For example, a variation in reflectivity ( and thus also in transmittance ) of a beam splitter, where
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| 24. | Customarily the Hong Ou Mandel effect is observed using two photodetectors monitoring the output modes of the beam splitter.
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| 25. | An additional photomultiplier system viewed a beam splitter in the optical path and was used as a star mapper.
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| 26. | When a photon enters a beam splitter, there are two possibilities : it will either be reflected or transmitted.
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| 27. | These then hit a beam splitter, which sends photons back to the barium borate crystal with 50 % probability.
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| 28. | Adding a beam splitter allows the viewer to see the reticle and the field of view, making a reflector sight.
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| 29. | On steadicam and remote head or crane operation, the viewfinder and beam splitter is often removed because its not needed.
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| 30. | A beam splitter divides the laser light into two paths, one of which has a phase modulator as described above.
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