[18a-W9_326-1~9] 3.5 Ultrashort-pulse and high-intensity lasers

11:00 AM - 11:15 AM JST(2:00 AM - 2:15 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[18a-W9_326-8] Bandwidth expansion of a 25-GHz repetition rate Electro-Optic modulation comb using a Mach-Zehnder modulator with feedback waveguide

〇(M1)Akihiro Nakano^1,2, Fong Chee Fai², Rai Kou², Junia Nomura¹, Guangwei Cong², Atsushi Ishizawa¹ (1.Nihon Univ., 2.AIST)

Keywords:

Optical Frequency comb,Electro-Optic comb

Broadband optical comb generation requires a wide spectral span for frequency stabilization; however, the modulation depth of a standalone modulator is inherently limited. In this study, we numerically demonstrated the generation of a 25-GHz electro-optic (EO) comb covering a 1-THz bandwidth using a Mach-Zehnder modulator equipped with a feedback waveguide. A key feature of the proposed modulator is its capability to tune the Q-factor by shifting the operating point, thereby enabling significant narrowing of the comb line-width.