Broadband coherently synthesized two-color electro-optic frequency combs with phase noise suppression. (1st January 2023)

• Record Type: Journal Article
• Authors: Li, Runmin; Tian, Haochen; Kato, Takashi; Asahara, Akifumi; Minoshima, Kaoru
• Is Part Of: Applied physics express. Volume 16:Number 1(2023)
• Publication Date: 2023-01-01
• Subjects: EO comb -- Coherent synthesis -- Phase noise suppression -- Broad spectrum; Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.35848/1882-0786/acaaea
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: A coherently synthesized 1550/1560 nm two-color EO comb is generated by modulating two continuous-wave lasers with common EO modulators and phase-locking their beat note. Compared with a single-color EO comb, the phase noise of comb modes that accumulated from the RF synthesizer is effectively suppressed in our coherently synthesized two-color EO comb. Besides, a broader spectrum is demonstrated in a coherently synthesized 1535/1560 nm two-color EO comb, with a 60-nm total spectrum span. The coherently synthesized two-color EO combs are expected to be applied in coherent communication, spectroscopy, absolute distance measurement, etc.