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Title: Time & Frequency; Atomic Clocks; Chip-scale Clock; Close up
Description: The physics package of the NIST chip-scale atomic clock includes (from the bottom) a laser, a lens, an optical attenuator to reduce the laser power, a waveplate that changes the polarization of the light, a cell containing a vapor of cesium atoms, and (on top) a photodiode to detect the laser light transmitted through the cell. The tiny gold wires provide electrical connections to the electronics for the clock.

PL, chip-scale clock, MEMS, Global Positioning System, GPS, navigation

See also http://www.nist.gov/public_affairs/releases/miniclock.cfm.
Subjects (names):
Topics/Categories: Time & Frequency--Atomic Clocks
Type: Photo/Color
Source: National Institute of Standards and Technology
Credit Line as it should
appear in print:
Courtesy National Institute of Standards and Technology
AV Number: 04PHY011
Date Created: August 27, 2004
Date Entered: 10/21/2004

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