Hybrid Approach for Generating High-order QAM

2014 Fiscal Year Annual Research Report

• Project/Area Number: 25709031
• Research Institution: Tokai University
• Principal Investigator: 呂 国偉 東海大学, 創造科学技術研究機構, 准教授 (30599709)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 情報通信工学 / コヒーレント光通信 / 多値光変調 / 光変調器

Outline of Annual Research Achievements

本研究の主目的は、柔軟QAM送信機を光通信システムに適用することである。このプロジェクトでは、柔軟QAM送信機は共通のハードウェアにおいて、動作方法を簡単に変更することにより、柔軟に異なる次数のQAM信号を生成できる、という、重要な役割を持つ。本研究で達成したことは、この柔軟QAM送信機の実用製を実証したこと、またこの送信機の光通信応用を実証したことである。詳細については、以下に述べる。
1)　QAM信号の位相雑音無依存波長交換
QAM信号は、特に高次の場合は、位相雑音に非常に敏感となる。従って、位相雑音の問題は、高次のQAM信号を用いたシステムでは、大きな問題となる。本研究では、コヒーレントポンピングの手法を用いた波長交換の方法を提案し、ポンプ光からの位相雑音を導入せずにQAM信号の波長交換を行う。PPLN導波路を用いた従属二次非線形効果を用い、16QAM信号とQPSK信号の波長交換の実験的実証に成功した。
2)　QAM信号の位相雑音無依存マルチキャスト
我々は、このコヒーレントポンピングの手法をポンプ光位相雑音を排した波長マルチキャストの概念に拡張、適用する。非線形ファイバ中の四光波混合を用い、16QAM信号のマルチキャストを実験的に実証した。全てのマルチキャスト信号光の受信感度劣化はほぼ無視できる程度となった。

Research Progress Status

26年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

26年度が最終年度であるため、記入しない。

Causes of Carryover

26年度が最終年度であるため、記入しない。

Expenditure Plan for Carryover Budget

26年度が最終年度であるため、記入しない。

Research Products

• [Journal Article] Multichannel wavelength multicasting for two QPSK signals based on FWM in SOA (2015)
  • Author(s): Jun Qin, Yuefeng Ji, Hongxiang Wang, Danshi Wang, Min Zhang, and Guo-Wei Lu
  • Journal Title: Chinese Optics Letters Volume: 13 Pages: 010601-010601
  • DOI: 10.3788/COL201513.010601.
  • Peer Reviewed
• [Journal Article] Simultaneous multichannel wavelength multicasting and XOR logic gate multicasting for three DPSK signals based on four-wave mixing in quantum-dot semiconductor optical amplifier (2014)
  • Author(s): Jun Qin, Guo-Wei Lu, Takahide Sakamoto, Kouichi Akahane, Naokatsu Yamamoto, Danshi Wang, Cheng Wang, Hongxiang Wang, Min Zhang, Tetsuya Kawanishi, and Yuefeng Ji
  • Journal Title: Optics Express Volume: 22 Pages: 29413-29423
  • DOI: 10.1364/OE.22.029413
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Multifunctional switching unit for add/drop, wavelength conversion, format conversion, and WDM multicast based on bidirectional LCoS and SOA-loop architecture (2014)
  • Author(s): Danshi Wang, Min Zhang, Jun Qin, Guo-Wei Lu, Hongxiang Wang, and Shanguo Huang,
  • Journal Title: Optics Express Volume: 22 Pages: 21847-21858
  • DOI: 10.1364/OE.22.021847
  • Peer Reviewed / Open Access
• [Journal Article] QPSK wavelength multicasting based on four-wave mixing in semiconductor optical amplifier (2014)
  • Author(s): Jun Qin, Hongxiang Wang, Danshi Wang, Min Zhang, Yuefeng Ji, and Guo-Wei Lu
  • Journal Title: Chinese Optics Letters Volume: 12 Pages: 1106011-1106015
  • DOI: 10.3788/COL201412.110601.
  • Peer Reviewed
• [Presentation] Pump-Phase-Noise-Tolerant Wavelength Multicasting for QAM Signals using Flexible Coherent Multi-Carrier Pump (2015)
  • Author(s): Guo-Wei Lu, Takahide Sakamoto, Tetsuya Kawanishi
  • Organizer: Optical Fiber Communication Conference and Exposition (OFC)
  • Place of Presentation: Los Angeles Convention Center, Los Angeles, USA
  • Year and Date: 2015-03-22 – 2015-03-26
  • Invited
• [Presentation] Multifunctional All-optical Signal Processing Scheme for Simultaneous Multichannel WDM Multicast and XOR Logic Gates Based on FWM in QD-SOA (2015)
  • Author(s): Danshi Wang, Ming Zhang, Guo-Wei Lu, Jun Qin, Takahide Sakamoto, Kouichi Akahane, Naokatsu Yamamoto, Tetsuya Kawanishi,
  • Organizer: Optical Fiber Communication Conference and Exposition (OFC)
  • Place of Presentation: Los Angeles Convention Center, Los Angeles, USA
  • Year and Date: 2015-03-22 – 2015-03-26
• [Presentation] Loop-Assisted Multi-Input-Multi-Output Coherent Matched Detector for Ultra High-Bandwidth Parallel Optical Time-Frequency Domain Sampling (2015)
  • Author(s): Takahide Sakamoto, Guo-Wei Lu, Tetsuya Kawanishi,
  • Organizer: Optical Fiber Communication Conference and Exposition (OFC)
  • Place of Presentation: Los Angeles Convention Center, Los Angeles, USA
  • Year and Date: 2015-03-22 – 2015-03-26
• [Presentation] Flexible High-Order QAM Transmitters for Elastic Optical Networks (2014)
  • Author(s): Guo-Wei Lu, Takahide Sakamoto, Tetsuya Kawanishi
  • Organizer: Proc. 13th International Conference on Optical Communications and Networks (ICOCN)
  • Place of Presentation: Suzhou Marriott Hotel, Suzhou, China
  • Year and Date: 2014-11-09 – 2014-11-10
  • Invited
• [Presentation] Wavelength Conversion of High-Order QAM Signals for Future Transparent All-Optical Networks (2014)
  • Author(s): Guo-Wei Lu, Takahide Sakamoto, Tetsuya Kawanishi
  • Organizer: Proc. 13th International Conference on Optical Communications and Networks (ICOCN)
  • Place of Presentation: Suzhou Marriott Hotel, Suzhou, China
  • Year and Date: 2014-11-09 – 2014-11-10
  • Invited
• [Presentation] Conjugated-Paired Radio-on-Fiber Transmission Scheme Highly Tolerant against Optical Fiber Nonlinearity (2014)
  • Author(s): Takahide Sakamoto, Guo-Wei Lu, Tetsuya Kawanishi
  • Organizer: Proc. of International Topical Meeting on Microwave Photonics/Asia-Pacific Microwave Photonics Conference (MWP/APMP)
  • Place of Presentation: Sapporo Convention Center, Sapporo, Japan
  • Year and Date: 2014-10-20 – 2014-10-23
• [Presentation] Electo-Optic Dual-Channel Coherent Signal Emulator (2014)
  • Author(s): Takahide Sakamoto, Guo-Wei Lu, Tetsuya Kawanishi
  • Organizer: IEEE Photonics Conference (IPC) 2014
  • Place of Presentation: Hyatt Regency La Jolla, San Diego, CA, USA
  • Year and Date: 2014-10-12 – 2014-10-16
• [Presentation] Phase-Conjugated Twin Signals Generation with Oppositely-Biased Paired IQ Modulators (2014)
  • Author(s): Takahide Sakamoto, Guo-Wei Lu, Tetsuya Kawanishi,
  • Organizer: IEEE Photonics Conference (IPC) 2014
  • Place of Presentation: Hyatt Regency La Jolla, San Diego, CA, USA
  • Year and Date: 2014-10-12 – 2014-10-16
• [Presentation] Data Overlay in Optical Networks through Level-Scalable Flexible Modulation and its Application in Multicast Overlay for WDM-PON (2014)
  • Author(s): Guo-Wei Lu, Takahide Sakamoto, Tetsuya Kawanishi
  • Organizer: IEEE Photonics Conference (IPC) 2014
  • Place of Presentation: Hyatt Regency La Jolla, San Diego, CA, USA
  • Year and Date: 2014-10-12 – 2014-10-16
• [Presentation] Pump-Linewidth-Tolerant Optical Data Exchange between 16QAM and QPSK with 50-GHz Channel-Spacing using Coherent DFB Pump (2014)
  • Author(s): Guo-Wei Lu, Andre Albuquerque, Benjamin J. Puttnam, Takahide Sakamoto, Miguel Drummond, Rogério Nogueira, Atsushi Kanno, Satoshi Shinada, Naoya Wada, and Tetsuya Kawanishi,
  • Organizer: Proc. of European Conference and Exhibition on Optical Communication (ECOC) 2014
  • Place of Presentation: Palais des Festivals et des Congrs, Cannes, France
  • Year and Date: 2014-09-21 – 2014-09-25
  • Invited
• [Presentation] Coherently-Pumped FWM in HNLF for 16QAM Wavelength Conversion Free of Phase Noise from Pumps (2014)
  • Author(s): Guo-Wei Lu, Takahide Sakamoto, Tetsuya Kawanishi,
  • Organizer: Proc. of European Conference and Exhibition on Optical Communication (ECOC) 2014
  • Place of Presentation: Palais des Festivals et des Congrs, Cannes, France
  • Year and Date: 2014-09-21 – 2014-09-25
  • Invited
• [Presentation] Coherently-Pumped 20Gbaud 16QAM Optical Wavelength Shifting Free of Phase Noise from Pumps (2014)
  • Author(s): Guo-Wei Lu, Andre Albuquerque, Benjamin J. Puttnam, Takahide Sakamoto, Miguel Drummond, Rogério Nogueira, Atsushi Kanno, Satoshi Shinada, Naoya Wada, and Tetsuya Kawanishi,
  • Organizer: OptoElectronics and Communications Conference (OECC) 2014
  • Place of Presentation: Melbourne Convention and Exhibition Center, Melbourne, Australia
  • Year and Date: 2014-07-06 – 2014-07-10
  • Invited
• [Presentation] Pump-linewidth tolerant wavelength conversion for high-order QAM signals (2014)
  • Author(s): Guo-Wei Lu
  • Organizer: Optoelectronic Devices and Integration (OEDI),OSA Topicals Meeting 2014
  • Place of Presentation: Huazhong University of Science and Technology, Wuhan, China
  • Year and Date: 2014-06-18 – 2014-06-21
  • Invited
• [Presentation] Pump-Linewidth-Tolerant Wavelength Conversion with Coherent Pumps (2014)
  • Author(s): Guo-Wei Lu, Andre Albuquerque, Benjamin J. Puttnam, Takahide Sakamoto, Miguel Drummond, Rogério Nogueira, Atsushi Kanno, Satoshi Shinada, Naoya Wada, and Tetsuya Kawanishi,
  • Organizer: Proc. Conference on Lasers and Electro-Optics (CLEO) 2014
  • Place of Presentation: San Jose Convention Center, San Jose, USA
  • Year and Date: 2014-06-08 – 2014-06-13
  • Invited
• [Presentation] Experimental Investigation of Sampling Phase Sensitivity in Baud-Rate Sampled Coherent Receiver for Nyquist Pulse-Shaped High-Order QAM Signals (2014)
  • Author(s): Guo-Wei Lu, Takahide Sakamoto, Tetsuya Kawanishi,
  • Organizer: Proc. Conference on Lasers and Electro-Optics (CLEO) 2014
  • Place of Presentation: San Jose Convention Center, San Jose, USA
  • Year and Date: 2014-06-08 – 2014-06-13
  • Invited
• [Remarks] Tokai University
  • URL: http://www.pr.tokai.ac.jp/tuiist/english/tt/announcement_lu.html