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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 22, Iss. 13 — Jul. 1, 1983
  • pp: 2034–2037

Traveling-wave electrooptic modulator

C. M. Gee, G. D. Thurmond, and H. W. Yen  »View Author Affiliations


Applied Optics, Vol. 22, Issue 13, pp. 2034-2037 (1983)
http://dx.doi.org/10.1364/AO.22.002034


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Abstract

An integrated-optics Mach-Zehnder interferometric modulator in LiNbO3 has been designed and fabricated. The electrodes are 3-μm thick asymmetric coplanar striplines formed by ion-beam etching techniques. The push–pull design and the r33 electrooptic coefficient of LiNbO3 are utilized for efficient modulation. Complete modulation is achieved with 6.5 V for the 6-mm long device at 0.83-μm wavelength and with 18 V at 1.3-μm wavelength. The 3-dB bandwidth of the modulator is 3.5 GHz, being limited by the excessive resistive loss of the stripline electrodes. Since this particular modulator retains a dc electrical bias, it performs either as an intensity modulator by applying a π/2 dc phase bias to achieve maximum linearity or as a frequency shifter by changing the dc bias point to π. In addition, we analyzed the principle of operation of the Y junction by observing both the in-phase and the out-of-phase modes of a multimode waveguide modulator.

© 1983 Optical Society of America

History
Original Manuscript: December 24, 1982
Published: July 1, 1983

Citation
C. M. Gee, G. D. Thurmond, and H. W. Yen, "Traveling-wave electrooptic modulator," Appl. Opt. 22, 2034-2037 (1983)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-22-13-2034


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References

  1. T. Sueta, M. Izutsu, J. Opt. Commun. 3, 52 (1982).
  2. O. G. Ramer, C. Nelson, C. Mohr, IEEE J. Quantum Electron. QE-17, 970 (1981). [CrossRef]
  3. K. Kubota, J. Noda, O. Mikami, IEEE J. Quantum Electron. QE-16, 754 (1980). [CrossRef]
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  5. C. M. Gee, C. Mohr, G. D. Thurmond, to be published.
  6. C. M. Gee, G. D. Thurmond, in Proceedings, International Conference on Lasers ’82, New Orleans (The Society of Optical and Quantum Electronics, Dec.1982).
  7. M. Izutsu, Y. Nakai, T. Sueta, Opt. Lett. 7, 136 (1982). [CrossRef] [PubMed]
  8. F. Auracher, R. Keil, Appl. Phys. Lett. 36, 626 (1980). [CrossRef]

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