Tunable Cavity

Tunable Optoelectronic Devices $180.02 Tunable devices are key components for various applications, such as wavelength division multiplexed (WDM) optical networks, optical interconnects, spectroscopy, infrared imaging and optical sensing. Various structures and designs have been reported for different applications. Micromechanically actuated devices have intrinsic advantages such as large dynamic range, fast tuning speed, a simple control mechanism, small size, cost effectiveness and process compatibility with other optoelectronic devices. This book discusses design, fabrication and application of monolithically tunable devices done in GaAs. The devices, including filters, detectors and vertical cavity surface emitting lasers (VCSELS), were designed for applications in communications, IR imaging and biosensing. Among some of the results to be shown are a torsional tunable filter, which provided a record tuning range of more than 100nm around 1550nm, and a high sensitivity biosensor using VCSEL, with sensitive to proteins in the femtoMol range. Author: Mateus, Carlos F. R. Binding Type: Paperback Number of Pages: 240 Publication Date: 2010/01/07 Language: English Dimensions: 9.02 x 5.98 x 0.55 inches

Cavity Search $5.99 Cavity Search

CP CP391 Tunable Tambourine $32.99 CP CP391 Tunable Tambourine

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Tunable Drum $23.99 Listen to the Rhythm Children love to make music and since rhythm is the foundation of all music making this drum will give any child an exciting way to make music with their own instrument Your child will grow up to be a professional drummer Age Range: 3 Years and up Compact size Tunable for more versatility Develop Listening Skills

Japanese Traditional Drum

A Look at the Technology Behind Wall Atomic Analogue Clocks

No timepiece is likely to escape inaccuracy; at least this is what we believed before the invention of the wall atomic analogue clocks. Such items use atomic resonance frequency standard in order to work their accuracy and feed the incorporated counter. The technology behind the wall atomic analogue clocks is a very advanced one involving the use of cold atoms in what scientists call absorption spectroscopy. The working principle is very intricate although extremely precise.

The very core of wall atomic analogue clocks and watches in general contains a tunable microwave cavity that is filled with hydrogen; the entire device relies on oscillations and their electronic amplification. In the first stages of the manufacturing process, there are special preparation procedures that make all the components for the design. Certain models use atoms with a changed electronic state, but they also require a change in the cavity as well.

Wall atomic analogue clocks are generally used for the creation of standard frequencies, and they are installed in sites of time signals. Such clocks are an absolute must for the use of Alpha navigation transmitters and they also find wide applications in radioastronomy for instance. The entire GPS navigation system relies on the use of wall atomic analogue clocks in the ground stations and atomic clocks installed on-board the satellites.

People who buy wall atomic analogue clocks are first and foremost attracted by their accuracy; however, they really have to pay good money for such items, as the prices start at a few hundred dollars. Most of the models include a radio-controlled movement which makes them completely trouble free; they will automatically set the time to the radio signal of the National Institute of Standards and Technology. Leap years, daytime savings are no longer an issue with wall atomic analogue clocks.

You can find cheaper wall atomic analogue clocks on some web pages, it is good however to check the technical specificity of such products before purchasing any. Most of them are highly reliable, not to mention that the designs are so plentiful that it is nearly impossible not to find a match for your home.

Some very advanced models even include a weather forecaster, an outdoor temperature option and other features that testify to their complexity. Certain producers have even gone to the length of including wall atomic analogue clocks in the structure of wireless weather stations, all efforts being directed towards achieving a higher level of efficiency and utility.

About the Author

Muna wa Wanjiru Has Been Researching and Reporting on Wall Clocks for Years. For More Information on Wall Atomic Analogue Clocks, Visit His Site at Wall Atomic Analogue Clocks