Linear Photonic RF Phase Shifter Using a DGD Element and an Optical Phase Modulator

Zhaohui Li, Changyuan Yu, Yi Fang Dong, Linghao Cheng, Luen Fu Kevin Lui, Chao Lu, Pak Tao Lau, Hwayaw Tam, Ping Kong Alexander Wai

Research output: Journal article publicationJournal articleAcademic researchpeer-review


We demonstrate a stable and linear photonic radio frequency (RF) phase shifter based on a differential-group-delay element and the polarization sensitive effect of an optical phase modulator. The phase shift can be tuned continuously over 360° for RF signals over 40GHz with an electrical control voltage from −7.5 to +7.5V.
Original languageEnglish
Pages (from-to)1881 - 1883
JournalOptics Letters
Issue number11
Publication statusPublished - 1 Jun 2010

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