nopa meaning in English

诺帕

Two kinds of bright epr entangled beams were experimentally generated by means of nondegenerate optical parametric amplifier ( nopa )
利用非简并光学参量放大器从实验上产生了两种明亮epr纠缠态光场。
3 . the fully inseparable bright tripartite entangled state ( tes ) was experimentally generated using the nopa at deamplification and the linear optical system consisting of polarization beam splitters and half wave plates
实验测定的这两个起伏方差分龙要别较散粒噪声极限降低3 . 28dbm和3 . 18dbm 。
When the nopa was operated at amplification , the epr states with amplitude - quadrature correlation and phase - quadrature anticorrelation were generated firstly in 1999 . the product of the amplitude and phase quadrature correlation degrees was 0 . 727 0 . 004 < 1 ; after the laser source was reconstructed , the epr beams with amplitude - quadrature anticorrelation and phase quadrature correlation were obtained in 2001 and the product of the correlation degrees was 0 . 332 0 . 003 when the nopa was operated at deamplification . 2
参量放大过程产生的纠缠光束具有正交振幅正关联、正交位相反关联的特性，乘积关联度为0 . 727 0 . 004 1 ；改进光源后，利用参量反放大( deamplification )过程产生了正交振幅反关联、正交位相正关联的明亮epr纠缠光束，乘积关联度达到0 . 332 0 . 003 1 。