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公开(公告)号：US5506721A
公开(公告)日：1996-04-09
申请号：US170346
申请日：1993-12-23
CPC分类号： G02F1/0134 , G02F1/11
摘要： In an external modulator for optical communication, a piezoelectric element section is formed by laminating a lower electrode, a piezoelectric thin film and an upper electrode in this order on one surface of a substantially flat substrate which has substantially the same acoustic impedance as the clad layer of a single mode optical fiber to be disposed on the substrate. At least one single mode optical fiber is disposed on the other surface of the substrate on the upper electrode, and the single mode optical fiber is at least partly coated with a material having an acoustic impedance substantially equal to that of the clad layer in a place in which the single mode optical fiber is disposed.
摘要翻译： PCT No.PCT / JP93 / 00148 Sec。 371日期：1993年12月23日 102（e）日期1993年12月23日PCT提交1993年2月5日PCT公布。 公开号WO93 / 22706 日期：11月11日，在光通信用外部调制器中，通过在基本上平坦的基板的一个表面上依次层叠下电极，压电薄膜和上电极来形成压电元件部， 与要设置在基板上的单模光纤的包层相同的声阻抗。 至少一个单模光纤设置在上电极上的基板的另一个表面上，并且单模光纤至少部分地涂覆有在一个地方具有基本上等于覆层的声阻抗的材料 其中设置单模光纤。
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2.发明授权
公开(公告)号：US5497437A
公开(公告)日：1996-03-05
申请号：US354735
申请日：1994-12-06
IPC分类号： G02B6/00 , G02B6/34 , G02F1/01 , H04B10/516 , H04B10/532 , H04B10/54 , H04B10/564 , H04B10/61 , G02B6/126
CPC分类号： G02B6/4204 , G02B6/2713 , G02B6/2766 , G02B6/2773
摘要： There is provided a method for modulating the polarization of light that allows detection of any modulated output regardless if the optical analyzers are rigidly held in place. According to a first aspect of the invention, a method for receiving light with a modulated polarization comprises steps of dividing the light being propagated through an optical fiber 1 with a polarization modulated in accordance with a modulation signal into three branched beams, causing one of the branched beams of light with a modulated polarization to pass through a .pi./2 phase corrector 2 and a first optical analyzer 3a and causing the remaining branched beams of light to respectively pass through second and third optical analyzers 3b and 3c without passing through any .pi./2 phase correctors before in order to receive light with a modualted intensity from the optical analyzers 3a, 3b and 3c. According to a second aspect of the invention, an apparatus for receiving light with a modulated plane is provided, said second optical analyzer 3b and said third optical analyzer 3c forming an angle of 49.degree. therebetween.
摘要翻译： 提供了一种用于调制光的偏振的方法，其允许检测任何调制的输出，而不管光学分析器是否被刚性地保持就位。 根据本发明的第一方面，一种用于接收具有调制偏振的光的方法包括以下步骤：将通过光纤1传播的光与根据调制信号调制的偏振分成三个分支光束，从而使得 具有调制偏振的分支光束通过π/ 2相位校正器2和第一光学分析仪3a，并使剩余的分支光束分别通过第二和第三光学分析器3b和3c，而不通过任何pi / 之前为了从光学分析仪3a，3b和3c接收具有调制强度的光，之前的两相校正器。 根据本发明的第二方面，提供一种用于接收具有调制平面的光的装置，所述第二光学分析器3b和所述第三光学分析器3c之间形成49°的角度。
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公开(公告)号：US5471545A
公开(公告)日：1995-11-28
申请号：US331903
申请日：1994-10-31
IPC分类号： G02F1/01
CPC分类号： G02F1/0134 , G02F2203/07
摘要： There is provided an optical external modulator that can modulate the polarization of incident light without regulating the state of polarization of the light entering the modulator. Such a modulator can be suitably incorporated into an optical telecommunications system. An optical external modulator according to the invention comprises a substrate 1, an optical transmission line 7, a polarization modulating section 11 and a phase changing section 8 for changing the state of polarization of the light passing through the optical transmission line by applying stress to the optical transmission line 7 as a function of a modulation signal given to the modulator such that the phase difference between the X-component and the Y-component of the light being propagated through the optical transmission line 7 is shifted by (2m-1)*.pi./2 (m is a positive integer).
摘要翻译： 提供了一种可以调制入射光的偏振而不调节进入调制器的光的偏振状态的光学外部调制器。 这种调制器可以适当地并入光通信系统中。 根据本发明的光学外部调制器包括基板1，光传输线7，偏振调制部分11和相位改变部分8，用于通过施加应力来改变通过光传输线的光的偏振状态 光传输线7作为调制信号的函数，使得通过光传输线7传播的光的X分量和Y分量之间的相位差被移位（2m-1）* pi / 2（m为正整数）。
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