RF Orbital Angular Momentum: NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY USING LIGHT WITH ORBITAL ANGULAR MOMEMTUM

Wednesday, January 5, 2011

NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY USING LIGHT WITH ORBITAL ANGULAR MOMEMTUM

NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY USING LIGHT WITH ORBITAL ANGULAR MOMENTUM
http://www.faqs.org/patents/app/20100327866

Abstract:

The present invention relates to a device capable of producing a high resolution chemical analysis of a sample, such as fluid, based upon nuclear magnetic resonance (NMR) spectroscopy, where the nuclear magnetic polarizations of the sample are generated by sequentially illuminating the sample with a focused beam of light carrying angular orbital angular momentum (OAM) and possibly momentum (spin). Unlike in usual NMR used for magnetic nuclear resonance imaging (MRI) or spectroscopy, the invention does not make use of a strong magnet.

Read more: http://www.faqs.org/patents/app/20100327866#ixzz1AAq0YAF7

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I believe that OAM may have some unique applications in RF signaling especially for new multi-spectral coding techniques, search for SETI and in the remote detection of bombs, land mines and IEDs.

By combining RF OAM with Nuclear Quadrapole Resonance (NQR) it may be possible to overcome many of the limitations of NQR at the moment for detecting explosives. NQR produces a very weak signal that happens to be in the RF bands of commercial broadcasting. So remote (or even close proximity detection) is a real challenge. The attraction of OAM is the possibility of detecting NQR response to OAM modulated signals at a distance through spatial filtering of the response signal to elminiate common RF interference. Also OAM appears to have no limit to "modulation" power i.e the OAM can be made powerful enough to even create physical resonance as for example the "optical spammer" noted in some of the OAM research. Other resonance stimulation may be possible such as rapidly changing the direction and polarity of the OAM. "Pumping" the NQR sensitive molecules into higher circular vibrational modes with OAM resonance can also be used to enable a secondary OAM RF signal to absorbed, emitted or cross modulated in the detection process. The use of such techniques might enable to detection of explosives at a distance and conceivably even be used to disable explosive devices. This includes atomic bombs which need to use a conventional explosive to ignite the fission core.

An excellent overview of OAM can be found at:
http://www.physics.irfu.se/Publications/Presentations/ThideEtBergman%3ACSC_SETI%3A2008.pdf

RF Orbital Angular Momentum

Wednesday, January 5, 2011

NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY USING LIGHT WITH ORBITAL ANGULAR MOMEMTUM

No comments:

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