-
公开(公告)号:US4118270A
公开(公告)日:1978-10-03
申请号:US658880
申请日:1976-02-18
CPC分类号: B29D11/00663 , B29D11/00365 , C03C25/104 , C03C25/68 , G02B6/262
摘要: Method of formation of lenses at optical fiber ends to increase the coupling efficiency thereof. In a first embodiment, the end of the optical fiber is masked with a substance non-soluble in the etching reagent. The portion of the coating at the very end of the fiber is then removed and the fiber end immersed in an etching reagent. The etching reagent serves to dissolve the uncoated portion of the fiber. By controlling the amount of time that the fiber end is in the reagent, different lens shapes may be formed. In a second embodiment, the fiber end is dipped into a liquid epoxy compound whereby a portion of the epoxy is deposited onto the fiber end. The surface tension of the portion deposited thereon draws the liquid epoxy into the desired lens shape. The epoxy is then hardened to form a permanent lens structure on the fiber end.
摘要翻译: 在光纤端部形成透镜以增加其耦合效率的方法。 在第一实施例中,光纤的端部被不可溶于腐蚀试剂的物质掩蔽。 然后除去纤维末端的涂层部分,将纤维端浸入蚀刻试剂中。 蚀刻剂用于溶解纤维的未涂覆部分。 通过控制纤维端在试剂中的时间量,可以形成不同的透镜形状。 在第二实施方案中,纤维端被浸入液态环氧化合物中,由此一部分环氧树脂沉积在纤维端上。 沉积在其上的部分的表面张力将液体环氧树脂制成所需的透镜形状。 然后将环氧树脂硬化以在纤维端部上形成永久性的透镜结构。
-
公开(公告)号:US4032802A
公开(公告)日:1977-06-28
申请号:US656160
申请日:1976-02-09
IPC分类号: H03C1/34 , H04B10/155 , H04B10/24 , H05B33/08 , H03K3/42
CPC分类号: H05B33/0803 , H03C1/34 , H04B10/2504 , H04B10/502 , H04B10/504 , H04B10/58 , H05B33/0851
摘要: A low distortion modulated light source, including a light emitting diode and a compensating diode. These diodes are arranged in parallel for D.C. biasing, and in anti-series with respect to the A.C. signal path. Means are provided for varying the relative biasing of the two devices so as to thereby adjust the A.C. characteristics of the compensating diode to more accurately correspond to the A.C. characteristics of the light emitting diode.When properly biased, the inherently non-linear junction capacitance of the light emitting diode is compensated so as to substantially eliminate undesired harmonics and intermodulation products.
-