-
公开(公告)号：US09020367B2
公开(公告)日：2015-04-28
申请号：US13202088
申请日：2010-02-17
CPC分类号： H04L27/223 , G02B6/12004 , G02B6/2813 , G02B2006/12116 , H04B10/60 , H04B10/611 , H04J14/06
摘要： Optical devices are disclosed consisting of optical chips (planar lightwave circuits) which have optically symmetric or matching designs and properties and optical components which create asymmetry in the optical devices. The devices find application in detection in coherent and non-coherent optical communications systems.
摘要翻译： 公开了由具有光学对称或匹配的设计和性质的光学芯片（平面光波电路）和在光学器件中产生不对称性的光学部件组成的光学器件。 该装置在相干和非相干光通信系统中发现应用于检测。
-
公开(公告)号：US07204932B2
公开(公告)日：2007-04-17
申请号：US10973568
申请日：2004-10-26
IPC分类号： B29D11/00
CPC分类号： G02B6/136 , G02B6/1228 , G02B6/126 , G02B2006/12097
摘要： An improved method is provided for fabricating a polarisation rotator in a rib waveguide having a propagation axis and opposite side walls. The method includes etching a pit in the substrate surface to form a recess in one of the side walls of the waveguide, during formation of the waveguide on the substrate surface, so as to provide an asymmetric waveguide section for imparting polarisation rotation to radiation propagated along the propagation axis. Preferably the pit is formed by a wet etching step forming an upper side surface within the recess that is inclined relative the waveguide side walls, and the waveguide side walls are formed by a dry etching step to extend perpendicularly to the substrate surface. In addition the dry etching step forms a lower side surface adjoining the upper side surface within the recess and tilted relative to the upper side surface. Such a method is significantly simplified as compared with prior art production methods, as well as providing greater yield and more predictable device performance since mask alignment errors no longer affect the design parameters of the rotator.
摘要翻译： 提供了一种用于在具有传播轴和相对侧壁的肋波导中制造偏振旋转器的改进方法。 该方法包括在衬底表面上形成波导期间蚀刻衬底表面中的凹坑以在波导的一个侧壁中形成凹陷，以便提供用于使波长旋转对沿着 传播轴。 优选地，通过湿蚀刻步骤形成凹坑，该凹蚀形成在凹槽内相对于波导侧壁倾斜的上侧表面，并且波导侧壁通过干蚀刻步骤形成，以垂直于基底表面延伸。 此外，干蚀刻步骤形成与凹部内的上侧表面相邻并且相对于上侧表面倾斜的下侧表面。 与现有技术的制造方法相比，这种方法被显着简化，并且由于掩模对准误差不再影响转子的设计参数，因此提供更大的产量和更可预测的装置性能。
-
公开(公告)号：US07099359B2
公开(公告)日：2006-08-29
申请号：US10333570
申请日：2001-07-09
CPC分类号： H04B10/5051 , G02F1/0121 , G02F1/225 , G02F1/2257 , G02F2001/212 , G02F2203/26 , G02F2203/54 , H04B10/505 , H04B10/508
摘要： An optical pulse train generator (2) for use in the transmission of high speed optical data in a return-to-zero (RZ) signalling format is described. The generator (2) comprises a light source (4) operable to produce an unmodulated output; an electro-optic interferometric optical modulator (6) for intensity modulating the unmodulated optical output in dependence on an sinusoidal drive voltage (vdrive) to produce a modulated optical signal, wherein the modulator (6) has an optical transmission versus drive voltage characteristic which is sinusoidal in form and wherein the modulator (6) is operable about a point of minimum optical transmission of said characteristic and said drive voltage has a amplitude (Vdrive) which exceeds one cycle (Vπ) of said characteristic such that the modulated optical signal is non-sinusoidal; and optical pulse shaping means (8, 10, 12) for aligning the phase of the frequency components of said modulated optical signal to produce an optical pulse train in which the pulses are substantially transform limited.
摘要翻译： 描述了用于以归零（RZ）信令格式传输高速光数据的光脉冲串发生器（2）。 发生器（2）包括可操作以产生未调制输出的光源（4） 用于根据正弦驱动电压（v>驱动器）对未调制的光输出进行强度调制以产生调制的光信号的电光干涉光调制器（6），其中调制器（6）具有 光传输相对于形式为正弦波的驱动电压特性，并且其中调制器（6）可围绕所述特性的最小光传输点操作，并且所述驱动电压具有超过的振幅（V SUB驱动） 所述特性的一个周期（V bias）使得调制的光信号是非正弦的; 以及光学脉冲整形装置（8,10,12），用于对准所述调制的光信号的频率分量的相位，以产生其中脉冲基本上被变换限制的光脉冲串。
-
公开(公告)号：US06870968B2
公开(公告)日：2005-03-22
申请号：US10221575
申请日：2001-03-14
CPC分类号： G02F7/00
摘要： A signal time-scaling arrangement utilises a known configuration comprising the use of a laser which has its wavelength varied over time, a modulator coupled to the laser and to a modulating analogue electrical source and a dispersion means coupled to the output of the modulator and providing at its output a signal which is a stretched version of the analogue modulating signal, but provides for the modulator to be a single-sideband modulator instead of double-sideband. The effect of this is to enable the use of a much simple laser-control system involving a CW laser output which is wavelength-ramped continuously between quite narrow wavelength limits, while allowing the use of a dispersion means having a wide dispersion characteristic in order to provide the required degree of time-scaling. The invention is application to an ADC system or to a Doppler system.
摘要翻译： 信号时间缩放装置利用已知的配置，其包括使用其波长随时间变化的激光器，耦合到激光器的调制器和调制模拟电源以及耦合到调制器的输出的分散装置，并提供 在其输出处是模拟调制信号的延伸版本的信号，但是将调制器提供为单边带调制器而不是双边带。 其效果是能够使用涉及CW激光输出的简单的激光控制系统，该CW激光输出在相当窄的波长极限之间连续地波长渐变，同时允许使用具有宽色散特性的色散装置，以便 提供所需的时间缩放程度。 本发明适用于ADC系统或多普勒系统。
-
公开(公告)号：US20120106984A1
公开(公告)日：2012-05-03
申请号：US13202088
申请日：2010-02-17
IPC分类号： H04B10/06
CPC分类号： H04L27/223 , G02B6/12004 , G02B6/2813 , G02B2006/12116 , H04B10/60 , H04B10/611 , H04J14/06
摘要： Optical devices are disclosed consisting of optical chips (planar lightwave circuits) which have optically symmetric or matching designs and properties and optical components which create asymmetry in the optical devices. The devices find application in detection in coherent and non-coherent optical communications systems.
摘要翻译： 公开了由具有光学对称或匹配的设计和性质的光学芯片（平面光波电路）和在光学器件中产生不对称性的光学部件组成的光学器件。 该装置在相干和非相干光通信系统中发现应用于检测。
-
-
-
-
搜索结果
5 条记录 (耗时 0.024 秒)
