Title :
Expansion of span-width of an optical frequency comb using a higher harmonic wave modulation
Author :
Saitoh, T. ; Kourogi, M. ; Ohtsu, M.
Author_Institution :
Kanagawa Acad. of Sci. & Technol., Japan
Abstract :
We propose a novel method for expanding the spanwidth of an optical frequency comb that utilizes modulation by a superposition of higher harmonic waves. Based on the calculations, it was found that in the terms up to third-order harmonic wave, the optimum superposition is the one whose power ratio between the fundamental and the third-order harmonic waves is 1:1. The validity of this method was experimentally confirmed at 1.5-μm wavelength region. By this optimum modulation with a wave power of 1.0 W, the span-width of OFC was increased to 72 mn (=9.1 THz).
Keywords :
laser variables measurement; mirrors; optical communication; optical harmonic generation; optical modulation; optical resonators; optimisation; /spl mu/m wavelength region; 1 W; higher harmonic wave modulation; higher harmonic wave superposition modulation; laser pair frequency difference measurement; optical communication; optical frequency comb; optimum superposition; power ratio; span-width; spanwidth; third-order harmonic wave; third-order harmonic waves; Frequency measurement; Frequency modulation; Microwave generation; Optical mixing; Optical modulation; Optical pulse generation; Optical receivers; Optical resonators; Optical waveguides; Phase modulation;
Journal_Title :
Photonics Technology Letters, IEEE
