专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US5253314A Tunable optical waveguide coupler 失效
标题翻译：可调光波导耦合器
公开(公告)号：US5253314A
公开(公告)日：1993-10-12
申请号：US830092
申请日：1992-01-31
申请人： Rodney C. Alferness , Lawrence L. Buhl , Thomas L. Koch , Uziel Koren
发明人： Rodney C. Alferness , Lawrence L. Buhl , Thomas L. Koch , Uziel Koren
IPC分类号： H01L31/12 , G02B6/12 , G02B6/122 , G02F1/313 , H01S5/00 , H01S5/026 , H01S5/0625 , H01S5/10 , H01S5/34 , G02B6/26
CPC分类号： H01S5/06256 , G02B6/12004 , G02B6/12007 , G02F1/3133 , G02F2001/3135 , G02F2203/055 , H01S5/1032 , H01S5/1035 , H01S5/3428
摘要： Various optical functions are generated in accordance with the present invention of a novel broadly tunable monolithic wavelength selective coupler which can be integrated with a gain medium to form a broadly tunable laser. The tunable wavelength selective coupler supports a pair of asynchronous waveguides, an upper waveguide and a lower waveguide, in combination with a phase match course grating for coupling optical energy between said waveguides. One end of the lower waveguide terminates at an output facet. The corresponding end of the upper waveguide terminates in an optical signal absorbing medium. The other end of the lower waveguide is terminated to prevent optical energy from entering the waveguide; and, the corresponding end of the upper waveguide terminates at an input facet. The combination of a gain section and the monolithically tunable wavelength selective coupler forms a broadly tunable laser which is an important source of optical energy for a number of applications such as wavelength division multiplexed networks and switching systems. The laser frequency is determined by that wavelength .lambda.o which satisifies the forward coupling phase match condition, .lambda.g=.LAMBDA..vertline.N.sub.2 -N.sub.1 .vertline. of the coupler where .LAMBDA. is the coarse grating period and N.sub.1, N.sub.2 are the effective indices of the two waveguides. Wavelengths which are not coupled from the upper waveguide to the lower waveguide are attenuated in the optical signal absorbing means. Tuning of the laser wavelength is achieved by either injecting current into or applying a reverse bias voltage to the upper waveguide to decrease or increase its index respectively and change the coupled wavelength.

2. 发明授权

US4439265A Fabrication method for LiNbO.sub.3 and LiTaO.sub.3 integrated optics devices 失效
标题翻译： LiNbO3和LiTaO3集成光学器件的制造方法
公开(公告)号：US4439265A
公开(公告)日：1984-03-27
申请号：US284472
申请日：1981-07-17
申请人： Rodney C. Alferness , Lawrence L. Buhl , Janet L. Jackel , Susan P. Lyman , Vellayan Ramaswamy
发明人： Rodney C. Alferness , Lawrence L. Buhl , Janet L. Jackel , Susan P. Lyman , Vellayan Ramaswamy
IPC分类号： C30B31/02 , C30B31/06
CPC分类号： C30B31/02 , C30B29/30
摘要： A simple, inexpensive, and reliable technique for substantially preventing the unwanted formation of a surface guiding layer during manufacture of light-guiding structures in LiNbO.sub.3 and LiTaO.sub.3 substrates is disclosed. The technique involves addition of an effective amount of a gaseous hydrogen donor to the processing atmosphere during high-temperature processing. A particularly convenient hydrogen donor is water vapor, which can be added to the atmosphere by, for instance, bubbling of the feed gas through a water column. A partial pressure of more than about 9 Torr of H.sub.2 O has been found effective in the practice of the technique.
摘要翻译：公开了一种用于在LiNbO 3和LiTaO 3衬底中制造导光结构期间基本上防止表面引导层不想要的形成的简单，便宜且可靠的技术。该技术涉及在高温处理期间向处理气氛中加入有效量的气态氢供体。特别方便的氢供体是水蒸气，其可以通过例如将进料气体鼓泡通过水柱而添加到大气中。已经发现超过约9托的H 2 O的分压在该技术的实践中是有效的。

3. 发明授权

US4381138A Electrooptic devices 失效
标题翻译：电光设备
公开(公告)号：US4381138A
公开(公告)日：1983-04-26
申请号：US181148
申请日：1980-08-25
申请人： Lawrence L. Buhl
发明人： Lawrence L. Buhl
IPC分类号： G02F1/01 , G02F1/035 , G02F1/313 , G02B5/14
CPC分类号： G02F1/0353 , G02F1/3132 , G02F2001/0142 , G02F2201/066 , G02F2201/124 , G02F2203/055
摘要： The response, as a function of frequency, of electrooptic mode converters using comb electrodes has been found to include several peaks at frequencies above and below the desired frequency. These spurious peaks appear to be caused by fringing of the electric field which effectively changes the spatial period of the electrode fingers. To prevent this unwanted coupling, channels have been etched between the comb fingers. The result is to confine the electric field to the narrow region between opposing electrode fingers, thereby minimizing the spurious responses. It also serves to reduce the magnitude of the applied voltage required to produce the same field strength.
摘要翻译：已经发现，使用梳状电极的电光模式转换器作为频率的函数的响应包括在所需频率之上和之下的频率处的多个峰。这些虚假的峰似乎是由电场的边缘引起的，这有效地改变电极指的空间周期。为了防止这种不希望的耦合，在梳齿之间已经蚀刻了通道。结果是将电场限制在相对的电极指之间的窄区域，从而使杂散响应最小化。它还用于减小产生相同场强所需的施加电压的大小。

4. 发明授权

US4275144A Method of fabricating electrodes with narrow gap therebetween 失效
标题翻译：制造间隙窄的电极的方法
公开(公告)号：US4275144A
公开(公告)日：1981-06-23
申请号：US114833
申请日：1980-01-24
申请人： Lawrence L. Buhl
发明人： Lawrence L. Buhl
IPC分类号： G02F1/035 , G03F7/00 , H03C7/00 , B05D3/06
CPC分类号： H03C7/00 , G02F1/035 , G03F7/0035
摘要： High speed, integrated optical directional coupler modulators utilize spaces of the order of one micron between waveguides. While one micron delineation of the waveguides can be readily obtained using conformable mask exposure techniques, diffraction effects become significant using thick glass masks required to delineate the electrodes. To overcome this problem, a two-process electrode fabrication procedure is employed. In accordance with the procedure a first pair of electrodes are deposited by a lithographic process. However, this yields a gap between electrodes that is wider than the desired gap. To reduce this distance, the process is repeated with the gap forming region of the mask laterally displaced. The result yields an electrode pattern with the desired spacing and thickness.
摘要翻译：高速集成的光学定向耦合器调制器利用波导之间的一微米级的空间。虽然可以使用适形的掩模曝光技术容易地获得波导的一微米描绘，但是使用描绘电极所需的厚玻璃掩模，衍射效应变得显着。为了克服这个问题，采用了双过程电极的制造方法。根据该程序，通过光刻工艺沉积第一对电极。然而，这产生比期望的间隙宽的电极之间的间隙。为了减小该距离，在掩模的间隙形成区域横向移位的情况下重复该过程。结果产生具有所需间隔和厚度的电极图案。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式