High-speed versatile optical modulator based on integrated LiNbO 3 waveguides

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Various advanced modulation formats, such as on-off-keying (OOK) with carving techniques, phase-shift-keying (PSK), frequency-shin-keying (FSK), etc, were investigated to obtain enhanced spectral efficiency or receiver sensitivity. Orthogonal modulation techniques with OOK and FSK or OOK and PSK are also useful for optical labeling in packet systems. Recently, we reported a versatile optical modulator consisting of a main Mach-Zehnder interferometer (MZI) which has two sub MZIs embedded in the two arms of the main MZI. The modulator can generate return-to-zero (RZ) OOK, binary phase-shift-keying (BPSK), quadrature phase-shift-keying (QPSK), wideband FSK, continuous-phase FSK, etc. By using this modulator, we demonstrated optical DQPSK modulation at 80Gbit/s. For QPSK modulation, two data signals are applied to the two sub MZ structures, to achieve control of in-phase and quadrature components. The versatile modulator can be also used for ultra high extinction ratio (ER) intensity modulation. The sub MZIs in the main MZI can compensate imbalance between the arms of the main MZI, where the imbalance is mainly due to fabrication error. The ER can be higher than 70dB. By using this technique, we can generate super stable two-tone lightwaves, where we can achieve large spurious suppression ration higher than 40dB.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume6775
DOIs
Publication statusPublished - 2007
Externally publishedYes
EventActive and Passive Optical Components for Communications VII - Boston, MA, United States
Duration: 2007 Sep 102007 Sep 12

Other

OtherActive and Passive Optical Components for Communications VII
CountryUnited States
CityBoston, MA
Period07/9/1007/9/12

Fingerprint

keying
Mach-Zehnder interferometers
Light modulators
modulators
Waveguides
high speed
Modulation
Modulators
waveguides
Quadrature phase shift keying
Phase shift keying
Binary phase shift keying
modulation
phase shift keying
quadrature phase shift keying
Light modulation
Labeling
extinction
binary phase shift keying
Fabrication

Keywords

  • Interferometer
  • Modulation format
  • Modulator
  • Phase-shift-keying

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Kawanishi, T. (2007). High-speed versatile optical modulator based on integrated LiNbO 3 waveguides. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 6775). [67750C] https://doi.org/10.1117/12.736434

High-speed versatile optical modulator based on integrated LiNbO 3 waveguides. / Kawanishi, Tetsuya.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6775 2007. 67750C.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kawanishi, T 2007, High-speed versatile optical modulator based on integrated LiNbO 3 waveguides. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 6775, 67750C, Active and Passive Optical Components for Communications VII, Boston, MA, United States, 07/9/10. https://doi.org/10.1117/12.736434
Kawanishi T. High-speed versatile optical modulator based on integrated LiNbO 3 waveguides. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6775. 2007. 67750C https://doi.org/10.1117/12.736434
Kawanishi, Tetsuya. / High-speed versatile optical modulator based on integrated LiNbO 3 waveguides. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6775 2007.
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