Title :
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
fDate :
4/1/1999 12:00:00 AM
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;
Journal_Title :
Quantum Electronics, IEEE Journal of
