The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Electro-optic frequency combs were generated using a train of frequency chirped waveforms. These combs had up to 10,000 teeth with a spacing as narrow as 200 kHz which enabled Doppler and sub-Doppler spectroscopy of 39K.
Virtually every corrosion detection method reports only the presence of a material phase that denotes probable corrosion, not its spectral signature. A signature specific to the type of iron oxide corrosion product would not only confirm the presence of corrosion but also provide insight into the environment of its formation. To identify the unique spectral signature of a commonly occurring corrosion...
Waveguide-based, electro-optic modulators were used to generate pitch-agile, optical frequency combs from a single continuous-wave laser. These combs are then detected via a multiheterodyne approach where the absorption information is down-converted into the radiofrequency domain.
We present an ultrasensitive cavity-enhanced technique for probing weak molecular absorptions. Recently, we have implemented heterodyne detection, which allowed for quantum-noise-limited detection and noise-equivalent absorption coefficients as low as 6×10−14 cm−1·Hz−1/2.
We present ultrasensitive measurements of molecular absorption using frequency-agile rapid scanning, cavity ring-down spectroscopy with an external-cavity diode laser. A microwave source that drives an electro-optic phase modulator with a bandwidth of 20 GHz generates pairs of sidebands on the probe laser. The optical cavity provides for high sensitivity and filters the carrier and all but a single,...
We report a method for rapidly scanning a cw-laser through optical cavity resonances. This technique involves a microwave source and an electro-optic phase modulator, giving high sensitivity, wide tunability and fast acquisition rates.
Theoretically expected frequency and temperature dependence of weak multiphonon bands at the far infrared absorption band edge are used to develop classical oscillator models of permittivity for several window materials (sapphire, ZnS and Pyroceram® 9606) which accurately model dielectric behavior from the infrared through the THz and into the microwave regions.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.