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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 34, Iss. 14 — Jul. 15, 2009
  • pp: 2144–2146

Optical minimum-shift-keying transmitter based on a monolithically integrated quad Mach–Zehnder in-phase and quadrature modulator

Guo-Wei Lu, Takahide Sakamoto, Akito Chiba, Tetsuya Kawanishi, Tetsuya Miyazaki, Kaoru Higuma, and Junichiro Ichikawa  »View Author Affiliations


Optics Letters, Vol. 34, Issue 14, pp. 2144-2146 (2009)
http://dx.doi.org/10.1364/OL.34.002144


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Abstract

We propose and demonstrate an optical minimum-shift-keying (MSK) transmitter using a single-quad Mach–Zehnder (MZ) in-phase and quadrature modulator, where four sub-Mach–Zehnder modulators are monolithically integrated on a main MZ superstructure. Using the proposed transmitter, a MSK signal at bit rate of B could be successfully generated by orthogonally superposing two low-speed ( B / 2 ) carrier-suppressed return-to-zero differential phase-shift-keying streams with a relative time offset, 1 / B . MSK signals at bit rate of 20 and 80 Gbits/s were successfully generated using the proposed MSK transmitter. A continuous changed phase trajectory of the obtained MSK was confirmed using a complex spectrum analyzer. The filtering tolerance of the MSK was also characterized using a bandwidth-variable tunable filter.

© 2009 Optical Society of America

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.5060) Fiber optics and optical communications : Phase modulation
(230.4110) Optical devices : Modulators

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: April 16, 2009
Revised Manuscript: May 29, 2009
Manuscript Accepted: May 30, 2009
Published: July 9, 2009

Citation
Guo-Wei Lu, Takahide Sakamoto, Akito Chiba, Tetsuya Kawanishi, Tetsuya Miyazaki, Kaoru Higuma, and Junichiro Ichikawa, "Optical minimum-shift-keying transmitter based on a monolithically integrated quad Mach-Zehnder in-phase and quadrature modulator," Opt. Lett. 34, 2144-2146 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-14-2144


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References

  1. J. Mo, Y. Dong, Y. J. Wen, S. Takahashi, Y. Wang, and C. Lu, European Conference on Optical Communications (ECOC) (2005), paper Th1.2.3.
  2. T. Sakamoto, T. Kawanishi, and M. Izutsu, European Conference on Optical Communications (ECOC) (2005), paper Th2.2.5.
  3. Y. Dong, P. Hu, Y. Su, H. He, W. Hu, and J. Chang, Optical Fiber Communications (OFC) Conference (2006), paper JTHB40.
  4. M. Rohde, R. Freund, C. Caspar, A. Hachmeister, and M. Gruner, European Conference on Optical Communications (ECOC) (2008), paper Mo.4.E.4.
  5. G.-W. Lu, T. Miyazaki, J. Ichikawa, K. Higuma, and T. Kawanishi, European Conference on Optical Communications (ECOC) (2008), paper Th.3.D.5.
  6. X. Wei, A. H. Gnauck, D. M. Gill, X. Liu, U.-V. Koc, S. Chandrasekhar, G. Raybon, and J. Leuthold, IEEE Photon. Technol. Lett. 15, 1639 (2003). [CrossRef]

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