Just click to park Bouncing ideas around Twinkle, twinkle, little laser A mousetrap for bacteria Bone in a bottle A good yarn Revolutionary buildings Bright sparks Serious fun The rhythm of life Shifting gears Recharged Fuelled by coffee Reprints Related items Quantum information technology: Enigma variationsJul 10th 2008What Dr Gisin has created is, in essence, an optical echo-chamber.
The system operates like a quantum optical memory which is referred to as Gradient Echo Memory (GEM) in analogy to the NMR gradient echo.
It is analogous to B-mode ultrasound pulse-echo imaging except that the optical rather than the acoustic reflectivity is measured.
By converting incident photons into ultrasound emission, PAI hybridizes the rich contrast of pure optical imaging and the high resolution of pulse-echo imaging in one modality.
"It is reminiscent of a cheap soap opera [with] optical effects that verge on the ridiculous," he said, echoing a widely held view.
The problems of optical memory (OM) based on the long-lived stimulated photon echo and multichannel optical superradiance are discussed.
OCT is based on an optical technique known as Michelson low-coherence interferometry, which measures the echo delay and intensity of back-reflected or backscattered infrared light (∼800 nm) to produce high-resolution, cross-sectional tomography of ocular strucutres.
Similar to pulse-echo ultrasound, optoacoustic imaging encodes the location of optical absorbers by the time-of-flight of ultrasound waves.
It is based on optical coherence tomography (OCT), which is analogous to ultrasound but measures the echo time delay and magnitude of light rather than sound (Fujimoto, 2003).
Spectral domain optical coherence tomography (SD OCT) measures the interference spectrum of time delay echoes of light using a spectrometer.
We evaluated the performance of an optical camera based prospective motion correction (PMC) system in improving the quality of 3D echo-planar imaging functional MRI data.
