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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 20, Iss. 12 — Dec. 1, 2002
  • pp: 2110–

40-Gb/s X-Cut LiNbO3 Optical Modulator With Two-Step Back-Slot Structure

Jungo Kondo, Atsuo Kondo, Kenji Aoki, Minoru Imaeda, Tsutomu Mori, Yukio Mizuno, Saori Takatsuji, Yoshinari Kozuka, mu Mitomi, and Makoto Minakata

Journal of Lightwave Technology, Vol. 20, Issue 12, pp. 2110- (2002)


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Abstract

We propose a newly designed X-cut lithium niobate (LiNbO3) optical modulator. It has a two-step back-slot structure to satisfy the velocity-matching condition without the buffer layer of silicon dioxide (SiO2). Accordingly,this modulator can achieve low drive voltage and low optical insertion loss. In addition, the dc-drift phenomena due to the buffer layer can be suppressed. This structure is fabricated with micromachining technology using excimer laser ablation. The optical 3-dB bandwidth of the fabricated modulator reaches 30 GHz, and the drive voltage is less than 3 V at 1 kHz. From the measurement of the optical eye diagram at 43.5-Gb/s, clear eye openings were obtained. This modulator is sufficient for 40-Gb/s optical transmission systems.

[IEEE ]

Citation
Jungo Kondo, Atsuo Kondo, Kenji Aoki, Minoru Imaeda, Tsutomu Mori, Yukio Mizuno, Saori Takatsuji, Yoshinari Kozuka, mu Mitomi, and Makoto Minakata, "40-Gb/s X-Cut LiNbO3 Optical Modulator With Two-Step Back-Slot Structure," J. Lightwave Technol. 20, 2110- (2002)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-20-12-2110

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