Synthesis of 16 Quadrature Amplitude Modulation Using Polarization-Multiplexing QPSK Modulator
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- MOROHASHI Isao
- National Institute of Information and Communications Technology
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- SAKAMOTO Takahide
- National Institute of Information and Communications Technology
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- SUDO Masaaki
- New Technology Research Laboratories, Sumitomo Osaka Cement Co. Ltd.
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- KANNO Atsushi
- National Institute of Information and Communications Technology
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- CHIBA Akito
- National Institute of Information and Communications Technology
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- ICHIKAWA Junichiro
- New Technology Research Laboratories, Sumitomo Osaka Cement Co. Ltd.
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- KAWANISHI Tetsuya
- National Institute of Information and Communications Technology
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We propose a polarization-multiplexing QPSK modulator for synthesis of a 16 QAM signal. The generation mechanism of 16 QAM is based on an electro-optic vector digital-to-analog converter, which can generate optical multilevel signals from binary electric data sequences. A quad-parallel Mach-Zehnder modulator (QPMZM) used in our previous research requires precise control of electric signals or fabrication of a variable optical attenuator, which significantly raises the degree of difficulty to control electric signals or device fabrication. To overcome this difficulty, we developed the polarization-multiplexing QPSK modulator, which improved the method of superposition of QPSK signals. In the polarization-multiplexing QPSK modulator, two QPSK signals are output with orthogonal polarization and superposed through a polarizer. The amplitude ratio between the two QPSK signals can be precisely controlled by rotating the polarizer to arrange the 16 symbols equally. Generation of 16 QAM with 40Gb/s and a bit error rate of 5.69×10-5 was successfully demonstrated using the polarization-multiplexing QPSK modulator. This modulator has simpler configuration than the previous one, utilized a dual-polarization MZM, alleviating complicated control of electric signals.
収録刊行物
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- IEICE Transactions on Communications
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IEICE Transactions on Communications E94-B (7), 1809-1814, 2011
一般社団法人 電子情報通信学会
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詳細情報 詳細情報について
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- CRID
- 1390282679352116096
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- NII論文ID
- 10029803155
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- NII書誌ID
- AA10826261
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- ISSN
- 17451345
- 09168516
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可