Title :
A monolithic optical frequency comb generator
Author :
Kourogi, M. ; Enami, T. ; Ohtsu, M.
Author_Institution :
Graduate Sch. of Sci. & Eng., Tokyo Inst. of Polytech., Kanagawa, Japan
Abstract :
A monolithic optical frequency comb (OFC) generator was realized by coating high reflection films on the facets of a LiNbO3 crystal used for an electro-optic (EO) phase modulator. The optical round-trip loss in the monolithic OFC generator was reduced to extend the span of an OFC. It is confirmed that the envelope of the OFC extended to a span as wide as 48 nm (or 6.1 THz) around 1.5 μm. The maximum measurable frequency difference, which was defined as the sideband frequency with the signal-to-noise ratio of 0 dB, was estimated to be also 6.1 THz.
Keywords :
electro-optical devices; integrated optics; lithium compounds; optical films; optical losses; optical modulation; 1.5 mum; 6.1 THz; LiNbO/sub 3/; LiNbO/sub 3/ crystal; OFC generator; coating; electro-optic phase modulator; facets; high reflection films; maximum measurable frequency difference; monolithic OFC generator; monolithic optical frequency comb generator; optical round-trip loss; sideband frequency; signal-to-noise ratio; Coatings; Electrooptic modulators; Frequency estimation; Frequency measurement; Optical films; Optical losses; Optical modulation; Optical reflection; Phase modulation; Signal to noise ratio;
Journal_Title :
Photonics Technology Letters, IEEE
