An optical single-sideband multilevel modulation with an optical-frequency swapping technique for huge-capacity communication equivalent to optical quadrature amplitude modulation

• Project/Area Number: 20760254
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Communication/Network engineering
• Research Institution: National Institute of Information and Communications Technology
• Principal Investigator: CHIBA Akito National Institute of Information and Communications Technology, 新世代ネットワーク研究センター先端ICTデバイスグループ, 専攻研究員 (30435789)
• Project Period (FY): 2008 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000); Fiscal Year 2009: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000); Fiscal Year 2008: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 周波数スワッピング / 光スイッチ / 光ノード / 単側波帯光変調 / 光周波数交換

Research Abstract

本研究では、大容量光通信技術への寄与を目指して、外部光源を用いることなく2つの光信号の光波長を入れ替える「周波数スワッピング」がrf信号により駆動されたニオブ酸リチウム光デバイスにより実現できることを理論・実験の両面から示した。また多値の単側波帯光変調において、光変調信号を生成する光変調器の構成要素である光分岐導波路の分岐比の非対称性が不要成分抑圧比の増大に有効であることを数値解析により示した。

Research Products

• [Journal Article] Adaptive threshold adjustment for signal- distortion-free digital-coherent optical demodulation system (2008)
  • Author(s): A. Chiba, T. Sakamoto, T. Kawanishi
  • Journal Title: Optics Express 16 Pages: 21647-21647
  • Peer Reviewed
• [Journal Article] Adaptive threshold adjustment for signal-distortion-free digital-coherent optical demodulation system (2008)
  • Author(s): A.Chiba
  • Journal Title: Optics Express 16 Pages: 21647-21655
  • Peer Reviewed
• [Presentation] 16-level Optical Quadrature Amplitude Modulation using Monolithic Quad-Parallel Mach-Zehnder Optical Modulator and Signal Transmission over 75-km Single-Mode Fiber (2010)
  • Author(s): A. Chiba, T. Sakamoto, T. Kawanishi, K. Higuma, M. Sudou, J. Ichikawa
  • Organizer: The Conference on Lasers and Electro-Optics (CLEO) 2010, CThC1
  • Place of Presentation: The Baltimore Convention Center, Baltimore, Maryland, U.S.A.
  • Year and Date: 2010-05-20
• [Presentation] 干渉型2x2光スイッチに集積化されたマッハツェンダー構造の光路長差制御 (2009)
  • Author(s): 千葉明人、坂本高秀、川西哲也、日隈薫、井筒雅之
  • Organizer: 2010年秋季第71回応用物理学会学術講演会
  • Place of Presentation: 長崎大学文教キャンパス、長崎県長崎市(発表予定(掲載決定済))
  • Year and Date: 2009-09-14
• [Presentation] 光強度トリマを備えた干渉型光スイッチにおける光側帯波生成を利用した光信号波長交換手法 (2009)
  • Author(s): 千葉明人、坂本高秀、川西哲也、日隈薫、井筒雅之
  • Organizer: 電子情報通信学会光エレクトロニクス研究会
  • Place of Presentation: 旭川市民文化会館、北海道旭川市
  • Year and Date: 2009-07-31
• [Presentation] モノリシック4並列光変調器により生成した16値光直交振幅変調信号の75kmシングルモードファイバ伝送 (2009)
  • Author(s): 千葉明人、坂本高秀、川西哲也、日隈薫、須藤正明、市川潤一郎
  • Organizer: 電子情報通信学会光エレクトロニクス研究会
  • Place of Presentation: 北海道大学学術交流会館、北海道札幌市(発表予定(掲載決定済))
  • Year and Date: 2009-07-29
• [Presentation] Frequency Swapping Using an Optical Switch with Embedded Mach-Zehnder Structures for Wavelength- Converted Optical Signal Routing Without Lightsources (2009)
  • Author(s): A. Chiba, T. Sakamoto, T. Kawanishi, K. Higuma, M. Izutsu
  • Organizer: The Conference on Lasers and Electro-Optics (CLEO) 2009, CMJJ5
  • Place of Presentation: The Baltimore Convention Center, Baltimore, Maryland, U.S. A
  • Year and Date: 2009-06-01
• [Presentation] Frequency Swapping Using an Optical Switch with Embedded Mach-Zehnder Structures for Wavelength-Converted Optical Signal Routing Without Lightsources (2009)
  • Author(s): A.Chiba
  • Organizer: The Conference on Lasers and Electro-Optics (CLEO) 2009
  • Place of Presentation: The Baltimore Convention Center, Baltimore, Maryland, U.S.
  • Year and Date: 2009-06-01
• [Presentation] Guard-Time-Free Port Selection by a LiNbO3 Optical Switch Embedded Intensity Trimmers for Optical Packet Switching (2009)
  • Author(s): A. Chiba, T. Kawanishi, T. Sakamoto, K. Higuma, M. Izutsu
  • Organizer: Optical Fiber Communication Conference and Exposition (OFC) and the National Fiber Optic Engineers Conference (NFOEC) 2009, JThA35
  • Place of Presentation: San Diego Convention Center, San Diego, CA, U.S. A
  • Year and Date: 2009-03-26
• [Presentation] Guard-Time-Free Port Selection by a LiNbO_3 Optical Switch Embedded Intensity Trimmers for Optical Packet Switching (2009)
  • Author(s): A.Chiba
  • Organizer: Optical Fiber Communication Conference and Exposition (OFC) and the National Fiber Optic Engineers Conference (NFOEC) 2009
  • Place of Presentation: San Diego Convention Center, San Diego, CA, U.S.A.
  • Year and Date: 2009-03-26
• [Presentation] Analysis of Crosstalk Impact on Optical Packet Signals in an Optical Cross-Bar Switch by Intensity-Trimming Method (2009)
  • Author(s): A. Chiba, T. Sakamoto, T. Kawanishi, K. Higuma, M. Izutsu
  • Organizer: Optical Fiber Communication Conference and Exposition (OFC) and the National Fiber Optic Engineers Conference (NFOEC) 2009, JWA19
  • Place of Presentation: San Diego Convention Center, San Diego, CA, U.S. A
  • Year and Date: 2009-03-25
• [Presentation] Analysis of Crosstalk Impact on Optical Packet Signals in an Optical Cross-Bar Switch by Intensity-Trimming Method (2009)
  • Author(s): A.Chiba
  • Organizer: Optical Fiber Communication Conference and Exposition (OFC) and the National Fiber Optic Engineers Conference (NFOEC) 2009
  • Place of Presentation: San Diego Convention Center, San Diego, CA, U.S.A.
  • Year and Date: 2009-03-25
• [Presentation] 光強度トリマを有するLiNbO3光スイッチによるガードタイムフリーの光信号経路制御 (2009)
  • Author(s): 千葉明人、川西哲也、坂本高秀、日隈薫、井筒雅之
  • Organizer: 電子情報通信学会2009年総合大会
  • Place of Presentation: 愛媛大学(愛媛県松山市)
  • Year and Date: 2009-03-18
• [Presentation] 光強度トリマを有するLiNbO_3光スイッチによるガードタイムフリーの光信号経路制御 (2009)
  • Author(s): 千葉明人
  • Organizer: 電子情報通信学会2009年総合大会
  • Place of Presentation: 愛媛大学(愛媛県松山市)
  • Year and Date: 2009-03-18
• [Patent(Industrial Property Rights)] バイアス点調整が可能な複数のマッハツェンダー構造を有する光変調器 (2010)
  • Inventor(s): 千葉明人・坂本高秀・土屋佑太・川西哲也
  • Industrial Property Rights Holder: 独立行政法人情報通信研究機構
  • Industrial Property Number: 2009-042975
  • Filing Date: 2010-02-26
• [Patent(Industrial Property Rights)] バイアス点調整機能を有する光変調器及びスイッチ (2009)
  • Inventor(s): 千葉明人・坂本高秀・川西哲也
  • Industrial Property Rights Holder: 独立行政法人情報通信研究機構
  • Industrial Property Number: 2009-043106
  • Filing Date: 2009-02-25
• [Patent(Industrial Property Rights)] 光信号波長変換方法および光信号波長変換装置 (2009)
  • Inventor(s): 千葉明人・坂本高秀・川西哲也
  • Industrial Property Rights Holder: 独立行政法人情報通信研究機構
  • Industrial Property Number: 2009-043146
  • Filing Date: 2009-02-25