公开(公告)号：US5668901A

公开(公告)日：1997-09-16

申请号：US601201

申请日：1996-02-14

Applicant: Donald B. Keck ,  Robert A. Modavis

Inventor： Donald B. Keck ,  Robert A. Modavis

IPC: G02B5/18 ,  G02B6/26 ,  G02B6/32 ,  G02B6/34 ,  G02B6/42 ,  G02B27/44

CPC classification number: G02B6/02085 ,  G02B6/02133

Abstract: Fiber Bragg gratings of low reflectivity are given a squared reflectivity function in the form of a tophat configuration having a flat top and lacking undesirable side lobes. Such a reflectivity function for a fiber Bragg grating is achieved by interfering a diffracted beam with a plane wavefront beam so as to impose a sinc function on the resulting interference pattern that imprints the grating on an optical fiber.

Abstract translation: 具有低反射率的光纤布拉格光栅具有平坦的反射功能，其形式为具有平坦顶部并且不具有不期望的旁瓣的波峰形式。 通过用衍射光束与平面波前光束进行干涉来实现对光纤布拉格光栅的这种反射功能，以便在将光栅压印在光纤上的所得到的干涉图案上施加sinc函数。

公开(公告)号：US5455879A

公开(公告)日：1995-10-03

申请号：US263809

申请日：1994-06-22

Applicant: Robert A. Modavis ,  Thomas W. Webb

Inventor： Robert A. Modavis ,  Thomas W. Webb

IPC: G02B6/32 ,  G02B6/02 ,  G02B6/14 ,  G02B6/42 ,  H01S5/00 ,  G02B6/00

CPC classification number: G02B6/4203

Abstract: To couple the elliptical mode field light beam of a laser radiation source to a circularly symmetric single-mode optical fiber, the end of the fiber is provided with an anamorphic lens. The double wedge-shaped lens provides high coupling efficiency and is easily constructed. Other anamorphic lenses are also disclosed. A single wedge lens can provide high coupling efficiency if it is formed on the end of a coupling fiber which has a core that is elliptically-shaped in cross-section, the line of intersection of the two surfaces forming the lens being aligned with the major axis of the elliptical fiber core.

Abstract translation: 为了将激光辐射源的椭圆模场场光束耦合到圆形对称单模光纤，光纤的端部设置有变形透镜。 双楔形透镜提供高耦合效率并且易于构造。 还公开了其他变形透镜。 如果形成在具有椭圆形横截面的芯的耦合光纤的端部上形成的单个楔形透镜可以提供高的耦合效率，形成透镜的两个表面的相交线与主体对准 椭圆光纤芯的轴线。