Abstract
A new photonic microwave phase shifter that can achieve a full 360° phase
shift with very little RF signal amplitude variation, and which can operate
over very wide frequency range, is presented. It is based on controlling the
amplitude and phase of the optical carrier and the two RF modulation sidebands
via the dc bias voltages to a dual-parallel Mach–Zehnder modulator (DPMZM).
It has a simple structure, only requiring a single laser, modulator, and photodetector.
A continuous 360° RF phase shift without changes in the RF signal amplitude is obtained
by controlling the dc bias voltages of the DPMZM. Experimental results demonstrate
a very wideband operation of the RF phase shifter over an 8:1 frequency range
from 2 to 16 GHz, a continuous 0–360° RF phase shift with very low amplitude
variation of < 3 dB of over the entire frequency band, and with a phase deviation
standard deviation of <
2°.
© 2012 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription