JP6608747B2 - 波長多重光受信装置及びその駆動方法 - Google Patents
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Description
(付記1)波長多重信号光を偏波成分毎に分離する偏波分離型光カプラと、前記偏波分離型光カプラで分離された一方の偏波成分を増幅する第1の半導体光増幅器と、前記偏波分離型光カプラで分離された他方の偏波成分を増幅する第2の半導体光増幅器と、前記第1の半導体光増幅器及び前記第2の半導体光増幅器の出力を波長毎に分離する波長分離器と、前記波長分離器の出力を波長毎に検出する光検出器と、前記第1の半導体光増幅器の前段で前記一方の偏波成分の光強度をモニタする第1のモニタ光検出器と、前記第2の半導体光増幅器の前段で前記他方の偏波成分の光強度をモニタする第2のモニタ光検出器と、第1のモニタ光検出器の出力と前記第2のモニタ光検出器の出力の強度比に応じて前記第1の半導体光増幅器及び前記第2の半導体光増幅器を異なる光利得で光増幅する制御回路とを有する波長多重光受信装置。
(付記2)前記波長分離器が前記第1の半導体光増幅器の出力を波長毎に分離する第1の波長分離器と、前記第2の半導体光増幅器の出力を波長毎に分離する第2の波長分離器とを備え、前記光検出器が双方向入力型光検出器である付記1に記載の波長多重光受信装置。
(付記3)前記第1の半導体光増幅器及び前記第2の半導体光増幅器と前記波長分離器との間に、前記第1の半導体光増幅器及び前記第2の半導体光増幅器の出力を単一の光導波路に合波する合波器を有し、前記波長分離器が単一の波長分離器である付記1または付記2に記載の波長多重光受信装置。
(付記4)前記合波器が、2×1型波長多重干渉計またはY型分岐導波路のいずれかである付記3に記載の波長多重光受信装置。
(付記5)前記第1の半導体光増幅器と前記第2の半導体光増幅器が同一基板上にアレイ化されている付記1乃至付記4のいずれか1に記載の波長多重光受信装置。
(付記6)前記偏波分離型光カプラが、偏波分離型グレーティングカプラである付記1乃至付記5のいずれか1に記載の波長多重受信装置。
(付記7)前記偏波分離型光カプラが、前記波長多重信号光が入力されるスポットサイズ変換器と、前記スポットサイズ変換器からの前記波長多重信号光をTEモードで伝搬するS偏光成分とTMモードで伝搬するP偏光成分に分離する偏波分離器と、前記偏波分離器によって分離されたTMモードで伝搬するP偏光成分をTEモードに変換する偏波ローテータとを備えている付記1乃至付記5のいずれか1に記載の波長多重受信装置。
(付記8)前記制御回路は、前記波長分離器の出力を波長毎に検出する前記光検出器の検出出力により、前記光検出器における受光強度が一定になるように、前記第1の半導体光増幅器及び前記第2の半導体光増幅器に注入する駆動電流を制御する機能を有する付記1乃至付記7のいずれか1に記載の波長多重受信装置。
(付記9)波長多重信号光を偏波成分毎に分離する偏波分離型光カプラで分離された一方の偏波成分の光強度をモニタした第1のモニタ出力と、前記偏波分離型光カプラで分離された他方の偏波成分をモニタした第2のモニタ出力を比較して、第1のモニタ出力と第2のモニタ出力の強度比に応じて前記一方の偏波成分を増幅する第1の半導体光増幅器と前記他方の偏波成分を増幅する第2の半導体光増幅器を異なる光利得で光増幅し、前記光増幅した波長多重信号光を波長毎に分離したのち、波長毎に光検出器で検知する波長多重光受信装置の駆動方法。
(付記10)前記第1のモニタ出力と前記第2のモニタ出力の強度比に応じて前記第1の半導体光増幅器と前記第2の半導体光増幅器の一方のみに電流注入を行い光利得を与える付記9に記載の波長多重光受信装置の駆動方法。
(付記11)前記第1のモニタ出力と前記第2のモニタ出力の強度比が予め設定した範囲内である場合には、前記第1の半導体光増幅器と前記第2の半導体光増幅器に互いに対称的な電流注入を行い互い対称的な光利得を与え、前記第1のモニタ出力と前記第2のモニタ出力の強度比が予め設定した範囲外である場合には、前記第1の半導体光増幅器と前記第2の半導体光増幅器の一方のみに電流注入を行い光利得を与える付記9に記載の波長多重光受信装置の駆動方法。
(付記12)前記第1の半導体光増幅器及び前記第2の半導体光増幅器に注入する駆動電流は、波長多重信号光の偏波状態にかかわらず波長分離後に前記光検出器に入力されるまでに与えられる光利得が一定となるように制御する付記9乃至付記11のいずれか1に記載の波長多重光受信装置の駆動方法。
(付記13)前記光検出器における受光強度が一定になるように、前記第1の半導体光増幅器及び前記第2の半導体光増幅器に注入する駆動電流を制御する付記9乃至付記12のいずれか1に記載の波長多重光受信装置の駆動方法。
11 偏波分離型光カプラ
12,13,18,19 光導波路
14,15 モニタ光検出器
16,17 半導体光増幅器
20,21 波長分離器
221,222,223,224,231,232,233,234 光導波路
24 光検出器
241,242,243,244 光検出素子
25 制御回路
26 光ファイバ
30,60 波長多重光受信装置
31,61 偏波分離型グレーティングカプラ
32,33,38,39,50,62,63,66,67 Si細線導波路
34,35 モニタPD
36,37,64,65 偏波依存型SOA
40,41,68,69 波長分離器
421,422,423,424,431,432,433,434,701,702,703,704,711,712,713,714 Si細線導波路
44,51 Geフォトダイオードアレイ
441,442,443,444,511,512,513,514 Geフォトダイオード
45 制御回路
46 増幅器駆動回路
47,73 光ファイバ
48 偏波依存型SOAアレイ
49 2×1MMI
52 Y型分岐導波路
53 スポットサイズ変換器
54 偏波分離器
55 偏波ローテータ
72 フォトダイオードアレイ
721,722,723,724 フォトダイオード
Claims (5)
- 波長多重信号光を偏波成分毎に分離する偏波分離型光カプラと、
前記偏波分離型光カプラで分離された一方の偏波成分を増幅する第1の半導体光増幅器と、
前記偏波分離型光カプラで分離された他方の偏波成分を増幅する第2の半導体光増幅器と、
前記第1の半導体光増幅器及び前記第2の半導体光増幅器の出力を波長毎に分離する波長分離器と、
前記波長分離器の出力を波長毎に検出する光検出器と、
前記第1の半導体光増幅器の前段で前記一方の偏波成分の光強度をモニタする第1のモニタ光検出器と、
前記第2の半導体光増幅器の前段で前記他方の偏波成分の光強度をモニタする第2のモニタ光検出器と、
第1のモニタ光検出器の出力と前記第2のモニタ光検出器の出力の強度比に応じて前記第1の半導体光増幅器及び前記第2の半導体光増幅器を異なる光利得で光増幅する制御回路と
を有する波長多重光受信装置。 - 前記波長分離器が前記第1の半導体光増幅器の出力を波長毎に分離する第1の波長分離器と、
前記第2の半導体光増幅器の出力を波長毎に分離する第2の波長分離器と
を備え、
前記光検出器が双方向入力型光検出器である請求項1に記載の波長多重光受信装置。 - 前記第1の半導体光増幅器及び前記第2の半導体光増幅器と前記波長分離器との間に、
前記第1の半導体光増幅器及び前記第2の半導体光増幅器の出力を単一の光導波路に合波する合波器を有し、
前記波長分離器が単一の波長分離器である請求項1または請求項2に記載の波長多重光受信装置。 - 前記第1の半導体光増幅器と前記第2の半導体光増幅器が同一基板上にアレイ化されている請求項1乃至請求項3のいずれか1項に記載の波長多重光受信装置。
- 波長多重信号光を偏波成分毎に分離する偏波分離型光カプラで分離された一方の偏波成分の光強度をモニタした第1のモニタ出力と、前記偏波分離型光カプラで分離された他方の偏波成分をモニタした第2のモニタ出力を比較して、第1のモニタ出力と第2のモニタ出力の強度比に応じて前記一方の偏波成分を増幅する第1の半導体光増幅器と前記他方の偏波成分を増幅する第2の半導体光増幅器を異なる光利得で光増幅し、
前記光増幅した波長多重信号光を波長毎に分離したのち、波長毎に光検出器で検知する波長多重光受信装置の駆動方法。
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US15/444,532 US9941975B2 (en) | 2016-03-25 | 2017-02-28 | Wavelength division multiplexing optical receiver and driving method for same |
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US20180351684A1 (en) * | 2016-11-15 | 2018-12-06 | Infinera Corparation | Optical modules having an improved optical signal to noise ratio |
EP3622639B1 (en) * | 2017-05-29 | 2021-10-27 | Huawei Technologies Co., Ltd. | Wavelength division multiplexing device and method |
JP2019078908A (ja) * | 2017-10-25 | 2019-05-23 | 日本電信電話株式会社 | 光モニタ回路 |
EP3725089A1 (en) * | 2017-12-13 | 2020-10-21 | Telefonaktiebolaget LM Ericsson (publ) | Device and method for processing an optical signal |
US11405112B2 (en) * | 2017-12-28 | 2022-08-02 | Futurewei Technologies, Inc. | Wavelength division multiplexed optical parameter detection receiver |
US11405125B2 (en) * | 2018-07-12 | 2022-08-02 | Ayar Labs, Inc. | TORminator system and associated methods |
JP7079391B2 (ja) * | 2018-10-30 | 2022-06-02 | 富士通株式会社 | 光伝送装置及び光素子 |
US11044015B2 (en) * | 2018-11-20 | 2021-06-22 | Google Llc | Low signal to noise ratio submarine communication system |
JP2020134609A (ja) * | 2019-02-15 | 2020-08-31 | 日本電気株式会社 | 光学素子 |
US11646802B2 (en) * | 2020-06-02 | 2023-05-09 | Hewlett Packard Enterprise Development Lp | Polarization independent optical receiver |
CN112468257B (zh) * | 2021-01-28 | 2021-06-01 | 南京帕卓丽电子科技有限公司 | 多芯多模光纤通信系统的光通道分插复用器ocadm |
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JPH0613988A (ja) * | 1992-06-26 | 1994-01-21 | Fujitsu Ltd | 偏波ダイバーシティ受信機 |
JP2002082321A (ja) * | 2000-09-08 | 2002-03-22 | Mitsubishi Electric Corp | 可変光フィルタ |
WO2005101702A1 (ja) * | 2004-04-15 | 2005-10-27 | Mitsubishi Denki Kabushiki Kaisha | 光受信装置 |
EP2086130B1 (en) * | 2008-01-29 | 2013-01-09 | Alcatel Lucent | Combined phase and polarization modulation for optical communication |
WO2009103118A1 (en) * | 2008-02-22 | 2009-08-27 | Ofidium Pty Ltd | Method and apparatus for reception of optical signals |
JP2010004251A (ja) * | 2008-06-19 | 2010-01-07 | Hitachi Communication Technologies Ltd | 光伝送装置および光伝送方法 |
JP5381993B2 (ja) * | 2008-10-03 | 2014-01-08 | 富士通株式会社 | 光増幅制御装置、半導体光増幅器の制御方法、及び光伝送装置 |
JP4996587B2 (ja) * | 2008-12-02 | 2012-08-08 | 日本電信電話株式会社 | 光送受信器及びそれを用いた光伝送システム |
CN101877799B (zh) * | 2009-11-18 | 2013-01-23 | 北京邮电大学 | 光分组的提取装置和提取方法 |
US9020366B2 (en) * | 2011-01-24 | 2015-04-28 | Nec Corporation | Polarization multiplexing optical receiving device and polarization multiplexing optical receiving method |
CN104303441B (zh) | 2012-05-31 | 2017-08-08 | 富士通株式会社 | 光发送接收装置以及光输出值控制方法 |
US9261635B2 (en) * | 2012-06-29 | 2016-02-16 | Infinera Corporation | Rotator external to photonic integrated circuit |
CN102833031B (zh) * | 2012-09-13 | 2015-04-08 | 电子科技大学 | 一种基于ofdma的可重构光分插复用器 |
US9407376B2 (en) * | 2013-10-29 | 2016-08-02 | Finisar Corporation | Polarization demultiplexing of optical signals |
JP6383590B2 (ja) * | 2014-07-07 | 2018-08-29 | 富士通株式会社 | 光受信装置 |
CN104459881B (zh) * | 2014-12-31 | 2017-04-12 | 武汉邮电科学研究院 | 偏振不敏感的波分复用型硅基光接收芯片 |
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