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Recent advances in ultra-high-bandwidth coherent driver modulator
Author(s): H. Wakita; Y. Ogiso; M. Nagatani; H. Yamazaki; M. Nakamura; T. Kobayashi; J. Ozaki; Y. Ueda; S. Kanazawa; T. Fujii; Y. Hashizume; H. Tanobe; N. Nunoya; M. Ida; Y. Miyamoto; M. Ishikawa
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Paper Abstract

We report a coherent driver modulator sub-assembly for 100-Gbaud class transmitter. The sub-assembly employs a codesigned high-speed driver IC and optical modulator, where the designs for the characteristic impedance between the driver IC and IQ modulator and for the RF pads are optimized. The EO bandwidth is over 67 GHz. This response is sufficient for 100-Gbaud-class operation even if we consider RF losses caused by a package, PCB, and DAC. We also demonstrated QPSK and 16-QAM at the speed of 128 and 112 Gbaud, respectively.

Paper Details

Date Published: 1 February 2019
PDF: 7 pages
Proc. SPIE 10947, Next-Generation Optical Communication: Components, Sub-Systems, and Systems VIII, 109470L (1 February 2019); doi: 10.1117/12.2511119
Show Author Affiliations
H. Wakita, NTT Corp. (Japan)
Y. Ogiso, NTT Corp. (Japan)
M. Nagatani, NTT Corp. (Japan)
H. Yamazaki, NTT Corp. (Japan)
M. Nakamura, NTT Corp. (Japan)
T. Kobayashi, NTT Corp. (Japan)
J. Ozaki, NTT Corp. (Japan)
Y. Ueda, NTT Corp. (Japan)
S. Kanazawa, NTT Corp. (Japan)
T. Fujii, NTT Corp. (Japan)
Y. Hashizume, NTT Corp. (Japan)
H. Tanobe, NTT Corp. (Japan)
N. Nunoya, NTT Corp. (Japan)
M. Ida, NTT Corp. (Japan)
Y. Miyamoto, NTT Corp. (Japan)
M. Ishikawa, NTT Corp. (Japan)

Published in SPIE Proceedings Vol. 10947:
Next-Generation Optical Communication: Components, Sub-Systems, and Systems VIII
Guifang Li; Xiang Zhou, Editor(s)

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