摘要
Stokes vector direct detection is a promising,cost-effective technology for short-distance communication applications.Here,we design and fabricate a spin-dependent liquid crystal grating to detect light polarization states.By separating the circular and linear components of incident light,the polarization states can be resolved with accuracy of up to 0.25°.We achieved Stokes vector direct detection of quadrature phase-shift keying(QPSK),8 PSK,and16-ary quadrature amplitude modulation signals with 32,16,and 16 GBd rates,respectively.We integrated the system,including the grating,photodetectors,and optical elements,on a miniaturized printed circuit board and demonstrated high-speed optical communications with 16 GBd rate QPSK signals.
基金
National Key Research and Development Program of China(2018YFB1800901,2018YFB1801801)
National Natural Science Foundation of China(11774240,61822507,61935013,U1701661,U2001601)
Science,Technology and Innovation Commission of Shenzhen Municipality(KQTD2015071016560101,KQTD20170330110444030)。
