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resonator News
Amplifier Enhances Ringdown Spectroscopy
May 1, 2004 — In recent years, investigators have adapted the principles of ringdown spectroscopy (see sidebar, facing page) to fiber optic configurations by placing high reflectors on each end of a fiber and observing the ringdown time of an injected pulse. But a major drawback is the difficulty of creating a low-loss, high-Q resonator in an optical fiber. Figure 1. A pulse injected from the distributed feedback laser (lower left) "rings down" as it passes repeatedly around the loop. An erbium-doped...
Cavity-Cooling Technique Cools Single Atoms
Apr 1, 2004 — At Max Planck Institut für Quantenoptik in Garching, Germany, researchers have developed an optical means of cooling single atoms that is at least five times faster than current techniques. Moreover, the approach, which they reported in the March 4...
Gratings Offer New Breed of Tunable Laser
Apr 1, 2003 — Researchers worldwide are pursuing several approaches to building tunable lasers that will enable future telecom systems to be quickly reconfigured for maximum transmission efficiency. Some approaches involve changing the feedback frequency of the...
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May 2024
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