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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • 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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