An innovative method to tune lasers toward infrared wavelengths — ScienceDaily

Researchers at Institut national de la recherche scientifique (INRS) have discovered a cost-effective way to tune the spectrum of a laser to the infrared, a band of great interest for many laser applications. They collaborated with Austrian and Russian research teams to develop this innovation, which is now the subject of a patent application. The results of their work were recently published in Optica, the flagship journal of the Optical Society (OSA).

In this field of study, many laser applications have a decisive advantage if the laser wavelength is located and possibly tunable in the infrared region. However, this is still hardly the case with current ultrafast laser technologies, and scientists need to explore various nonlinear processes to shift the emission wavelength. In particular, the Optical Parametric Amplifier (OPA) has so far been the only well-established tool to reach this infrared window. Although OPA systems offer a broad range

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Infrared NASA imagery finds Chan-hom organizing, consolidating

Infrared NASA imagery finds Chan-hom organizing, consolidating
On Oct. 6 at 0353 UTC (Oct. 5 at 11:53 p.m. EDT) NASA’s Aqua satellite analyzed Tropical Storm Chan-hom using the Atmospheric Infrared Sounder or AIRS instrument. AIRS found coldest cloud top temperatures as cold as or colder than (purple) minus 63 degrees Fahrenheit (minus 53 degrees Celsius) around the consolidating center. Credit: NASA JPL/Heidar Thrastarson

NASA’s Aqua satellite analyzed the large Tropical Storm Chan-hom as it tracked through the Northwestern Pacific Ocean. Aqua imagery showed the storm was consolidating, indicating a strengthening trend.


One of the ways NASA researches tropical cyclones is using infrared data that provides temperature information. The AIRS instrument aboard NASA’s Aqua satellite captured a look at those temperatures in Chan-hom and gave insight into the size of the storm and its rainfall potential.

Cloud top temperatures provide information to forecasters about where the strongest storms are located within a tropical cyclone. The stronger the storms,

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NASA infrared imagery reveals wind shear displacing Marie’s strongest storms

NASA infrared imagery reveals wind shear displacing Marie's strongest storms
On Oct.5 at 6:20 a.m. EDT (1020 UTC), the MODIS instrument that flies aboard NASA’s Aqua satellite gathered infrared data on Marie that confirmed wind shear was adversely affecting the storm. Persistent westerly vertical wind shear showed strongest storms (yellow) pushed east of the center where cloud top temperatures were as cold as minus 50 degrees Fahrenheit (minus 45.5 Celsius). Credit: NASA/NRL

NASA’s Aqua satellite provided an infrared view of Tropical Storm Marie that revealed the effects of outside winds battering the storm.


Wind shear occurs when winds at different levels of the atmosphere push against the rotating cylinder of winds, weakening the rotation by pushing it apart at different levels.

NASA’s Aqua Satellite Reveals Effects of Wind Shear 

Infrared light is a tool used to analyze the strength of storms in tropical cyclones by providing temperature information about a system’s clouds. The strongest thunderstorms that reach highest into the

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