news digest ♦ Lasers
compared to 25% in the third quarter of fiscal 2011. GAAP gross margin for the fourth quarter of fiscal 2011 included approximately 3% points of impact from excess and obsolete reserves and related inventory valuation charges. Non-GAAP gross margin was 23% for the fourth quarter of fiscal 2011, compared to 25% in the third quarter of fiscal 2011.
Nanotubes could help measuring THz laser power a piece of cake
NIST researchers have found that dense arrays of extra-long carbon nanotubes absorb nearly all light of long wavelengths, and are promising coatings for prototype detectors intended to measure terahertz laser power.
Terahertz radiation can penetrate numerous materials—plastic, clothing, paper and some biological tissues—making it an attractive candidate for applications such as concealed weapons detection, package inspection and imaging skin tumours.
Highlights for Fiscal Year 2011:
However, to date there is no standard method for measuring the absolute output power of terahertz lasers, one source of this type of radiation. Now, researchers at the National Institute of Standards and Technology (NIST) have found that dense arrays of extra-long carbon nanotubes absorb nearly all light of long wavelengths, and thus are promising coatings for prototype detectors intended to measure terahertz laser power.
First Quarter Fiscal 2012 Outlook The results of Oclaro, Inc. for the first quarter of fiscal 2012, which ends October 1, 2011, are expected to be:
“Cupcakes” of vertically aligned carbon nanotube arrays (VANTAs) grown on silicon, which appear violet in the photo. A chunk of VANTA can be sliced from the silicon with a razor blade and, using the blade as a spatula, easily moved to the top of a laser power detector. The very dark nanotube coating absorbs terahertz laser light. (Credit: Lehman/NIST)
The research is part of NIST’s effort to develop the first U.S. reference standards for calibrating lasers
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www.compoundsemiconductor.net August/September 2011
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