Research Project
Grant-in-Aid for Research Activity Start-up
We studied phase sensitive amplifier (PSA) which allows us to amplify optical signal with low noise quality. The efficiency of the carrier phase recovery was improved more than 10 dB by improving the design of optical device. We proved that stable phase locking and negligible degradation of signal quality is possible by modification of phase locked loop circuit. We also demonstrated amplification of polarization multiplexed signal by using two PPLN waveguide in polarization diversity configuration. We examined dispersion tolerance of the PSA experimentally and we found that signal quality can be recovered by amplification in PSA if the phase variation within a signal bandwidth is below π/2.
All 2015 2014 2013
All Journal Article (4 results) (of which Peer Reviewed: 4 results, Open Access: 3 results, Acknowledgement Compliant: 1 results) Presentation (13 results) (of which Invited: 5 results)
J. Optical Society of America B
Volume: 31 Issue: 12 Pages: 3164-3169
10.1364/josab.31.003164
Optics Express
Volume: 22 Issue: 22 Pages: 26642-26650
10.1364/oe.22.026642
First Demonstration of High-Order QAM Signal Amplification in PPLN-based Phase Sensitive Amplifier
Volume: 22 Issue: 3 Pages: 2473-2482
10.1364/oe.22.002473
Volume: 22 Pages: 2473-2482
