Laser-phase-fluctuation-insensitive offset-frequency-spaced two-tone optical coherent detection scheme with digital-signal-processing technique for radio-over-fiber systems

Toshiaki Kuri, Takahide Sakamoto, Tetsuya Kawanishi

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

2 Citations (Scopus)

Abstract

We have proposed a laser-phase-fluctuation-insensitive optical coherent detection scheme assisted by a digital signal processing (DSP) technique for radio-over-fiber (RoF) systems. In this system, a "two-tone" local light is used for an individual optical coherent detection of both the carrier and the modulated components of RoF signal, where a frequency separation of two-tone local light is the same as that of RoF signal. To distinguish the carrier and the modulated components in the process of optical coherent detection, they have to be separated in the optical domain. In this paper, we proposed a new optical coherent detection scheme with an "offset-frequency-spaced two-tone" local light, which is also in principle insensitive to the laser phase fluctuation and is assisted by the DSP technique. In the proposed scheme, it is not required to separate the carrier and the modulated components in the optical domain because they can be easily separated in the electrical domain after the photodetection. Therefore, the system configuration is expected to be simpler than that in the previous scheme. First, we explain the principle of our new proposal and experimentally demonstrate the data recovery. Then, the influence of the frequency detuning between photo-detected modulated and unmodulated signals is discussed. Moreover, the transmission performance with an error vector magnitude (EVM) is also evaluated for the optical coherent detection of a 10-Gbaud quadrature-phase-shift-keying RoF signal after a 20-km-long standard single-mode fiber transmission. As a result, it is shown that the EVM of less than 12.4 %rms is achieved.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSPIE
Volume9387
ISBN (Print)9781628414776
DOIs
Publication statusPublished - 2015
Externally publishedYes
EventBroadband Access Communication Technologies IX - San Francisco, United States
Duration: 2015 Feb 102015 Feb 12

Other

OtherBroadband Access Communication Technologies IX
CountryUnited States
CitySan Francisco
Period15/2/1015/2/12

Fingerprint

Radio over Fiber
Coherent Detection
Radio-over-fiber
Frequency Offset
Digital signal processing
Signal Processing
signal processing
Fluctuations
Laser
fibers
Lasers
lasers
Quadrature phase shift keying
Single mode fibers
quadrature phase shift keying
proposals
Single-mode Fiber
Recovery
recovery
Phase Shift

Keywords

  • Digital signal processing
  • Laser phase fluctuation
  • Optical coherent detection
  • Radio-over-fiber (RoF)

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Laser-phase-fluctuation-insensitive offset-frequency-spaced two-tone optical coherent detection scheme with digital-signal-processing technique for radio-over-fiber systems. / Kuri, Toshiaki; Sakamoto, Takahide; Kawanishi, Tetsuya.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 9387 SPIE, 2015. 93870D.

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

Kuri, T, Sakamoto, T & Kawanishi, T 2015, Laser-phase-fluctuation-insensitive offset-frequency-spaced two-tone optical coherent detection scheme with digital-signal-processing technique for radio-over-fiber systems. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 9387, 93870D, SPIE, Broadband Access Communication Technologies IX, San Francisco, United States, 15/2/10. https://doi.org/10.1117/12.2078490
Kuri, Toshiaki ; Sakamoto, Takahide ; Kawanishi, Tetsuya. / Laser-phase-fluctuation-insensitive offset-frequency-spaced two-tone optical coherent detection scheme with digital-signal-processing technique for radio-over-fiber systems. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 9387 SPIE, 2015.
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