Abstract
A microwave photonic phase detector (MPPD) for simultaneous synchronization of two independent microwave sources to a single mode-locked laser (MLL) with femtosecond-level residual timing jitters is firstly proposed and experimentally demonstrated. A Sagnac loop is built based on a dual-polarization dual-drive Mach-Zehnder modulator (DP-DMZM). Each path consisting a branch of the modulator forms an MPPD due to its feature of polarization multiplexing. Thus, two dielectric resonator oscillators (DROs) can be synchronized simultanesously. A proof-of-concept experiment is carried out. Two independent DROs with frequencies of 8.0320 and 8.3332 GHz are synchronized to an MLL. The phase noises of the synchronized 8.0320-GHz signal are −109.79 and −135.14 dBc/Hz at the 1-kHz and 10-kHz offset frequencies, respectively, and those of the 8.3332-GHz signal are −106.87 and −133.86 dBc/Hz. The residual timing jitters of the two synchronized signals (integrated from 100 Hz to 1 MHz) are around 2.12 fs and 5.93 fs, respectively. The impact of the amplitude and phase imbalances of the driven signals to the DP-DMZM on the performance of the MPPD is investigated.
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