JP2013122620A - 光変調器における無線周波数応答の共振器アシステッド制御 - Google Patents
光変調器における無線周波数応答の共振器アシステッド制御 Download PDFInfo
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- G02F1/21—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour by interference
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
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Abstract
【解決手段】光変調器402は、マッハツェンダ干渉計(MZI)及びMZI内部アームの1つ430aに調整可能な光カプラ434を介して結合された光共振器460を有する。光共振器460は、スペクトル共振の櫛によって特徴づけられる周波数依存性光損失をMZIにおいて引き起こす。光共振器460と光カプラ434で設定されるMZIとの間の結合強度は共振に起因する損失の大きさを制御する一方で、光共振器460に配置された1以上の光位相シフタ464が共振のスペクトル位置を制御する。光カプラ434又は光位相シフタ464のいずれか又は双方は変調器402の無線周波数応答曲線を調節するように調整できる。
【選択図】図4A
Description
本願は、2007年10月9日に出願された米国特許出願第11/869205号、「Resonator-Assisted Control of Radio-Frequency Response in an Optical Modulator」の一部継続出願(CIP)であり、その全体において参照としてここに取り込まれる。
Claims (10)
- 光変調器であって、
第1及び第2の内部アームを有する光マッハツェンダ干渉計、
第1の光共振器、及び
前記第1の光共振器と前記第1の内部アームを光学的に結合するように構成された第1の光カプラ
を備え、
前記光変調器が、該変調器のデータ入力に適用されるデータで光キャリアを変調するように構成され、
前記第1の光共振器及び前記第1の光カプラが、前記データ変調に対して前記変調器の無線周波数応答を変化させて、前記光キャリアの光周波数付近のスペクトル範囲で反転した無線周波数応答を呈するように調整できるものである、光変調器。 - 請求項1の光変調器において、
前記第1の光共振器によって前記第1のアームにおいて引き起こされる光損失がスペクトル共振によって特徴づけられ、
前記第1の光カプラは前記共振の大きさを制御するように調整できるものである、光変調器。 - 請求項1の光変調器において、前記第1の光共振器及び前記第1の光カプラが、前記光変調器が約0.3dB/GHzよりも小さいスペクトル減衰勾配で特徴づけられる無線周波数応答を呈するように調整されたものである、光変調器。
- 請求項1の光変調器において、前記光共振器が、受信直流制御電圧に基づいて前記光共振器の有効光路長を規定するように構成された調整可能な位相シフタを備える、光変調器。
- 請求項4の光変調器において、
前記位相シフタがさらに、電気的な無線周波数信号を受信して前記データ変調を生成するように構成され、
前記第1の光共振器が、前記第1の光カプラに接続された導波ループを備え、
前記位相シフタが前記導波ループの一部である、光変調器。 - 請求項4の光変調器において、
前記第1の光共振器によって前記第1のアームにおいて引き起こされる光損失が、各々がスペクトル位置を有する1以上のスペクトル共振によって特徴づけられ、
前記位相シフタが前記スペクトル位置の少なくとも1つを制御可能に変化させるように構成された、光変調器。 - 請求項1の光変調器において、
前記第1の光共振器及び前記第1の光カプラが、前記変調器が前記反転無線周波数応答を呈するように調整されたものであり、
前記光変調器が、前記光変調器の外部の1つ以上の帯域幅制限部材を有する通信システムの一部であり、
前記反転応答の特性が、前記1つ以上の帯域幅制限部材によって生成される無線周波数ロールオフを少なくとも部分的にオフセットするように選択され、
前記光変調器が前記1つ以上の帯域幅制限部材よりも上流側に配置され、
前記反転応答が、前記無線周波数ロールオフを少なくとも部分的に前段補償して、それによる、前記1つ以上の帯域幅制限部材を介して前記変調器に光学的に結合された光受信機での信号受信への作用を軽減する、光変調器。 - 光を変調する方法であって、
第1及び第2の内部アームを有する光マッハツェンダ干渉計に光キャリアを適用するステップであって、
前記光マッハツェンダ干渉計が光変調器の一部であり、
前記光変調器がさらに、光共振器、及び該光共振器と前記第1の内部アームを光学的に結合するように構成された光カプラを備える、
ステップ、
前記変調器のデータ入力に適用されるデータで前記光キャリアを変調するステップ、及び
前記変調器が前記光キャリアの光周波数付近のスペクトル範囲で反転した無線周波数応答を呈するように、前記第1の光共振器及び前記光カプラを調整するステップ
を備える方法。 - 請求項8の方法において、
前記光変調器が、前記光変調器の外部の1つ以上の帯域幅制限部材を有する通信システムの一部であり、
前記方法がさらに、
前記反転応答の特性を、前記1つ以上の帯域幅制限部材によって生成される無線周波数ロールオフを少なくとも部分的にオフセットするように選択するステップを備える、方法。 - 請求項9の方法において、
前記光変調器が前記1つ以上の帯域幅制限部材よりも上流側に配置され、
前記反転応答が、前記無線周波数ロールオフを少なくとも部分的に前段補償して、それによる、前記1つ以上の帯域幅制限部材を介して前記変調器に光学的に結合された光受信機での信号受信への作用を軽減する、方法。
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US12/168,976 US7805026B2 (en) | 2007-10-09 | 2008-07-08 | Resonator-assisted control of radio-frequency response in an optical modulator |
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KR20110041461A (ko) | 2011-04-21 |
CN102084611B (zh) | 2015-05-20 |
US7805026B2 (en) | 2010-09-28 |
JP5721757B2 (ja) | 2015-05-20 |
WO2010044814A1 (en) | 2010-04-22 |
JP2011527767A (ja) | 2011-11-04 |
US20090092350A1 (en) | 2009-04-09 |
KR101160435B1 (ko) | 2012-06-26 |
EP2316178A1 (en) | 2011-05-04 |
CN102084611A (zh) | 2011-06-01 |
MY165878A (en) | 2018-05-18 |
EP2316178A4 (en) | 2011-12-07 |
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