JP4552977B2 - 光信号品質モニタ装置 - Google Patents
光信号品質モニタ装置 Download PDFInfo
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- JP4552977B2 JP4552977B2 JP2007184608A JP2007184608A JP4552977B2 JP 4552977 B2 JP4552977 B2 JP 4552977B2 JP 2007184608 A JP2007184608 A JP 2007184608A JP 2007184608 A JP2007184608 A JP 2007184608A JP 4552977 B2 JP4552977 B2 JP 4552977B2
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- 230000003287 optical effect Effects 0.000 title claims description 164
- 238000012806 monitoring device Methods 0.000 title claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 36
- 230000010287 polarization Effects 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 3
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims 2
- 239000006185 dispersion Substances 0.000 description 31
- 238000010586 diagram Methods 0.000 description 12
- 230000007423 decrease Effects 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 230000010355 oscillation Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 5
- 238000005070 sampling Methods 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 239000013307 optical fiber Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07953—Monitoring or measuring OSNR, BER or Q
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Description
以下、本発明による光信号品質モニタ装置の第1の実施形態を、図面を参照しながら説明する。
図1は、第1の実施形態に係る光信号品質モニタ装置の構成を示すブロック図である。
次に、第1の実施形態に係る光信号品質モニタ装置100の動作(光信号品質モニタ方法)を説明する。
第1の実施形態によれば、入力光信号を2分岐し、一方の分岐光信号を、オフセットをかけた信号で変調することにより、低周波の信号に変換し、この低周波信号の強度と、他方の分岐光信号の強度との比率で、入力光信号の波形品質をモニタするようにしたので、高いビットレートの光信号であってもその品質を適切に捉えることができるようになる。
次に、本発明による光信号品質モニタ装置の第2の実施形態を、図面を参照しながら説明する。
次に、本発明による光信号品質モニタ装置の第3の実施形態を、図面を参照しながら説明する。
上記各実施形態では、例として、チャープのないガウシアンのパルスで、繰り返し周波数が160GHzの短パルス列を用いた場合で説明したが、変調を行った信号についても用いることができ、他のパルス形状でも用いることができる。また、低域周波数Δfも、1GHzに限定されるものではない。
Claims (7)
- 入力光信号を2分岐する分岐手段と、
EA変調器を内蔵し、一方の分岐光信号に対し、上記EA変調器で、上記入力光信号の周波数の1/N(Nは自然数)の周波数にオフセットを付与した信号でEA変調して上記オフセットのN倍の周波数を有する低周波数信号を得る低周波変換手段と、
得られた低周波数信号を所定帯域に制限すると共に電気信号に変換する低周波光電変換手段と、
上記分岐手段から出力された分岐光信号を電気信号に変換した後、低域成分を濾波し、又は、上記分岐手段から出力された分岐光信号の低域成分を濾波した後、電気信号に変換する基準信号生成手段と、
電気信号に変換された他方の分岐光信号の低域成分を基準にして、電気信号に変換された低周波数信号の強度比を得る強度比算出手段と、
得られた強度比を予め登録されている特性と共に表示出力させる、若しくは、得られた強度比を予め登録されている特性と照合して上記入力光信号の品質パラメータを得る品質モニタ手段と
を有することを特徴とする光信号品質モニタ装置。 - 上記分岐手段、上記低周波変換手段、上記低周波光電変換手段、上記基準信号生成手段及び上記強度比算出手段とを有する処理系統を2系統以上備え、
少なくとも1系統は、上記低周波変換手段に至る前の一方の分岐光信号に広スペクトル光を重畳する雑音光重畳手段を有する
ことを特徴とする請求項1に記載の光信号品質モニタ装置。 - 上記分岐手段、上記低周波変換手段、上記低周波光電変換手段、上記基準信号生成手段及び上記強度比算出手段とを有する処理系統を2系統以上備え、
少なくとも1系統は、上記低周波変換手段に至る前の一方の分岐光信号を通過させる光バンドパスフィルタを有する
ことを特徴とする請求項1に記載の光信号品質モニタ装置。 - 上記分岐手段に至る前に、入力光信号の偏光状態を変更する偏光状態変更手段を有することを特徴とする請求項1に記載の光信号品質モニタ装置。
- 上記偏光状態変更手段は、入力光信号の偏光状態を周期的に変動させるものであることを特徴とする請求項4に記載の光信号品質モニタ装置。
- 上記偏光状態変更手段は、偏光状態を偏光子によって変動させることを特徴とする請求項5に記載の光信号品質モニタ装置。
- 上記偏光状態変更手段は、偏光状態を電気光学効果を発揮する光学素子によって変動させることを特徴とする請求項5に記載の光信号品質モニタ装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007184608A JP4552977B2 (ja) | 2007-07-13 | 2007-07-13 | 光信号品質モニタ装置 |
CN200810125682.3A CN101345583B (zh) | 2007-07-13 | 2008-06-20 | 光信号质量监视装置 |
US12/216,878 US8121475B2 (en) | 2007-07-13 | 2008-07-11 | Optical signal quality monitor for a high-bit rate signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007184608A JP4552977B2 (ja) | 2007-07-13 | 2007-07-13 | 光信号品質モニタ装置 |
Publications (2)
Publication Number | Publication Date |
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JP2009021943A JP2009021943A (ja) | 2009-01-29 |
JP4552977B2 true JP4552977B2 (ja) | 2010-09-29 |
Family
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JP2007184608A Expired - Fee Related JP4552977B2 (ja) | 2007-07-13 | 2007-07-13 | 光信号品質モニタ装置 |
Country Status (3)
Country | Link |
---|---|
US (1) | US8121475B2 (ja) |
JP (1) | JP4552977B2 (ja) |
CN (1) | CN101345583B (ja) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5319468B2 (ja) * | 2009-09-18 | 2013-10-16 | 日本電信電話株式会社 | 光回路 |
JP5471241B2 (ja) * | 2009-09-28 | 2014-04-16 | 沖電気工業株式会社 | 光信号品質モニタ装置 |
JP5545752B2 (ja) * | 2010-12-20 | 2014-07-09 | 富士通テレコムネットワークス株式会社 | 光パケット交換システム |
EP2618531B1 (en) * | 2012-01-20 | 2014-12-24 | ADVA Optical Networking SE | Method and device for transmitting a low-frequency signal over a data transmission link using a digital high bit-rate signal |
US9088369B2 (en) | 2012-12-28 | 2015-07-21 | Synergy Microwave Corporation | Self injection locked phase locked looped optoelectronic oscillator |
US9094133B2 (en) * | 2013-03-12 | 2015-07-28 | Synergy Microwave Corporation | Integrated production of self injection locked self phase loop locked optoelectronic oscillator |
JP6380136B2 (ja) | 2015-01-30 | 2018-08-29 | 富士通株式会社 | 推定装置、及び、推定方法 |
CN110741312B (zh) * | 2017-06-21 | 2022-12-09 | 三菱电机株式会社 | 光发送装置、光发送方法、光发送装置的控制电路以及光发送装置的存储介质 |
Citations (3)
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JPH11223575A (ja) * | 1997-12-01 | 1999-08-17 | Nippon Telegr & Teleph Corp <Ntt> | 光信号品質モニタ |
JP2001194241A (ja) * | 2000-01-11 | 2001-07-19 | Nec Corp | 光サンプリング波形測定方法及び光サンプリング波形測定装置 |
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2007
- 2007-07-13 JP JP2007184608A patent/JP4552977B2/ja not_active Expired - Fee Related
-
2008
- 2008-06-20 CN CN200810125682.3A patent/CN101345583B/zh not_active Expired - Fee Related
- 2008-07-11 US US12/216,878 patent/US8121475B2/en not_active Expired - Fee Related
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JPH11223575A (ja) * | 1997-12-01 | 1999-08-17 | Nippon Telegr & Teleph Corp <Ntt> | 光信号品質モニタ |
JP2001194241A (ja) * | 2000-01-11 | 2001-07-19 | Nec Corp | 光サンプリング波形測定方法及び光サンプリング波形測定装置 |
JP2004048688A (ja) * | 2002-05-14 | 2004-02-12 | Nippon Telegr & Teleph Corp <Ntt> | 高速サンプリングによるデータ信号品質評価方法および装置 |
Also Published As
Publication number | Publication date |
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CN101345583A (zh) | 2009-01-14 |
JP2009021943A (ja) | 2009-01-29 |
CN101345583B (zh) | 2012-07-04 |
US8121475B2 (en) | 2012-02-21 |
US20090016712A1 (en) | 2009-01-15 |
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