Presentation Information
[10p-C212-13]Sub-Picosecond Pulse Generation at a 25-GHz Repetition Rate in the Telecommunication Wavelength Band Using an On-Chip Multistage Silicon Modulator
〇Yuki Tsukada1, Tatsuto Okubo1, Yuki Matsuzawa1, Guangwei Cong2, Rai Kou2, Xuejun Xu3, Kenichi Hitachi3, Junia Nomura1, Noritsugu Yamamoto2, Katsuya Oguri3, Koji Yamada4, Atsushi Ishizawa1 (1.Nihon Univ., 2.AIST., 3.NTT BRL., 4.AIST(G-QuAT).)
Keywords:
Electro-Optic Modulation Comb,Silicon photonics
For microwave noise reduction using electro-optic (EO) combs, it is crucial to simultaneously achieve bandwidth expansion and optical path length reduction. In this study, we investigated broadband EO comb generation using a multi-stage Si modulator. While high RF driving was conventionally limited by RF loss, optimizing the RF feeding system promoted higher-order sideband generation. By utilizing highly nonlinear effects, we significantly expanded the EO comb bandwidth from approximately
1.3 THz to 3.98 THz. Furthermore, we successfully generated 903-fs optical pulses, achieving the world's shortest pulse duration for a Si-modulator-based platform.
1.3 THz to 3.98 THz. Furthermore, we successfully generated 903-fs optical pulses, achieving the world's shortest pulse duration for a Si-modulator-based platform.