公开(公告)号：US20190020419A1

公开(公告)日：2019-01-17

申请号：US15750493

申请日：2015-08-06

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Jason PELC ,  Ashkan SEYEDI ,  Marco FIORENTINO

IPC: H04B10/556 ,  G02F1/225 ,  G02B6/293 ,  H04B10/50

CPC classification number: H04B10/5561 ,  G02B6/29353 ,  G02F1/225 ,  G02F1/2257 ,  G02F2001/212 ,  G02F2203/15 ,  H04B10/505

Abstract: In one example, an apparatus includes e first beam splitter having a final output and a second output. A first optical waveguide is coupled to the first output, and a second optical waveguide is coupled to the second output. A first tunable phase delay is further coupled to the second optical waveguide and has a third output. A first set of phase modulators is coupled to the first optical waveguide, and a second set of phase modulators is coupled to the third output of the first tunable phase delay. At least one of the first set of phase modulators and the second set of phase modulators includes a phase modulator that is driven to three or more distinct phase states. A second beam splitter has a first input coupled to the first optical waveguide and a second input coupled to the second optical waveguide.