Laser is a new light source.Comparing with ordinary light the laser has good monochromaticity, directivity, coherency, high brightness, high power and high energy etc.
The experiments suggest that the superfluorescence of fluoride glass fibr is a kind of low coherence and high performances light source with bright application prospect.
Through installing inphase(I) channel and quadrature (Q) channel, the effect of the carrier can be eliminated in NDLL.Therefore, the noncoherent demand of NDLL is satisfied.
We propose and show that the integral of magneton for the neutral atom of coherence along its motion-path in electric field will contribute to a geometric phase.