公开(公告)号：US3958188A

公开(公告)日：1976-05-18

申请号：US531565

申请日：1974-12-11

申请人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Charles Elachi ,  Gary A. Evans ,  Cavour Yeh

发明人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Charles Elachi ,  Gary A. Evans ,  Cavour Yeh

IPC分类号： H01S3/067 ,  H01S3/093 ,  H01S3/082

CPC分类号： H01S3/0675 ,  G02B6/02066 ,  H01S3/093 ,  H01S3/06704

摘要： Utilizing round optical fibers as communication channels in optical communication networks presents the problem of obtaining a high efficiency coupling between the optical fiber and the laser. A laser is made an integral part of the optical fiber channel by either diffusing active material into the optical fiber or surrounding the optical fiber with the active material. Oscillation within the active medium to produce lasing action is established by grating the optical fiber so that distributed feedback occurs.

公开(公告)号：US4025876A

公开(公告)日：1977-05-24

申请号：US613004

申请日：1975-09-12

申请人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Charles Elachi

发明人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Charles Elachi

IPC分类号： H03B5/32 ,  H03B9/12

CPC分类号： H03B5/326

摘要： An acoustic surface wave oscillator is constructed from a semiconductor-piezoelectric acoustic surface wave amplifier by providing appropriate perturbations at the piezoelectric boundary. The perturbations cause Bragg order reflections that maintain acoustic-wave oscillation under certain conditions of gain and feedback.

摘要翻译： 通过在压电边界处提供适当的扰动，由半导体压电声表面波放大器构成声表面波振荡器。 扰动导致在某些增益和反馈条件下保持声波振荡的布拉格阶反射。

公开(公告)号：US3939439A

公开(公告)日：1976-02-17

申请号：US533555

申请日：1974-12-17

申请人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Charles Elachi

发明人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Charles Elachi

IPC分类号： H01S3/03 ,  H01S3/08

CPC分类号： H01S3/0315

摘要： For use in a waveguide gas laser a capillary tube of glass or ceramic has an inner surface defining a longitudinal capillary opening through which the laser gas flows. At least a portion of the inner surface is corrugated with corrugations or channels with a periodicity .LAMBDA. where .LAMBDA. = 1/2.lambda., .lambda. being the laser gas wavelength. The tube includes a diffused region extending outwardly from the opening. The diffused region of a depth d on the order of 1.lambda. to 3.lambda. acts as a waveguide for the waves, with the corrugations producing distributed feedback. The evanescent component of the waves travelling in the diffused region interact with the laser gas in the opening, gaining energy therefrom, and thereby amplifying the waves travelling in the diffused region, which exit the diffused region, surrounding the opening, as a beam of wavelength .lambda..

摘要翻译： 为了用于波导气体激光器，玻璃或陶瓷的毛细管具有限定激光气体流过的纵向毛细管开口的内表面。 内表面的至少一部分波纹状波纹或具有周期性LAMBDA的通道，其中LAMBDA =1/2λ，λ为激光波长。 管包括从开口向外延伸的扩散区域。 深度为1λ至3λ的扩散区域用作波的波导，波纹产生分布式反馈。 在扩散区域中行进的波的消逝分量与开口中的激光气体相互作用，从中获得能量，从而放大在扩散区域中传播的波，该扩散区域作为波长波束离开扩散区域 lambda。