12-THz frequency difference measurements and noise analysis of an optical frequency comb in optical fibers

Author

Imai, K. ; Widiyatmoko, B. ; Kourogi, Motonobu ; Ohtsu, Motoichi

Author_Institution

Interdisciplinary Graduate Sch. of Sci. & Eng., Tokyo Inst. of Technol., Japan

Volume

35

Issue

4

fYear

1999

fDate

4/1/1999 12:00:00 AM

Firstpage

559

Lastpage

564

Abstract

A span up to 50 THz of optical frequency comb (OFC) has been obtained by self-phase modulation in an optical fiber. The coherent nature of the process was verified by heterodyne-detecting the sidebands offset by up to 12 THz from the carrier. The signal-to noise ratio (SNR) of the beat signal between a sideband at 12 THz offset and another single-mode laser was 32 dB in a 1-MHz bandwidth. Although the linewidth of each beat signal was maintained within a few megahertz, phase noise pedestal power increased with the offset frequency

Keywords

heterodyne detection; laser modes; optical fibre testing; optical noise; phase noise; self-phase modulation; spectral line broadening; 1 MHz; THz frequency difference measurements; beat signal; coherent nature; heterodyne-detecting; linewidth; offset frequency; offset sidebands; optical fiber; optical fiber testing; optical frequency comb; optical noise analysis; phase noise pedestal power; self-phase modulation; signal-to noise ratio; single-mode laser; Fiber lasers; Fiber nonlinear optics; Frequency measurement; Laser noise; Noise measurement; Optical fibers; Optical mixing; Optical modulation; Optical noise; Signal to noise ratio;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.753660

Filename

753660