公开(公告)号：US4265649A

公开(公告)日：1981-05-05

申请号：US110774

申请日：1980-01-09

Applicant: Claude Achener

Inventor： Claude Achener

IPC: C03B37/014 ,  C03B8/00 ,  C03B19/01 ,  C03B20/00 ,  C03B37/012 ,  G02B6/00 ,  C03C25/02

CPC classification number: C03B37/01291 ,  C03B19/01 ,  C03B2201/02 ,  C03B2201/10 ,  C03B2203/26

Abstract: The invention provides a method for preparing a preform for producing by drawing an optical waveguide comprising a core region and a sheath region whose refractive index varies in the radial direction, so that the index of the former is greater than those of the second. The method consists in starting from a bar of a first composition for forming the core region and in forming, by means of a plasma torch, on its surface, a deposit of a plurality of layers whose composition varies in the radial direction, is characterized in that glass powder is fed to said torch transversely to the jet of said torch; in that said bar is drawn after each layer is deposited to bring its diameter to a value close or equal to the initial diameter; and in that the chemical composition of the glass powder is changed after each layer is deposited. The preform obtained by the present method makes it possible to produce by drawing optical waveguides for applications in the field of information transmission.

Abstract translation: 本发明提供一种制备用于制造预制棒的方法，该预成型件通过拉伸包括芯区域和折射率在径向方向变化的鞘区域的光波导制造，使得前者的折射率大于第二光导体的折射率。 该方法包括从用于形成芯区域的第一组合物的棒开始，并且通过等离子体焰炬在其表面上形成其组成在径向方向上变化的多个层的沉积，其特征在于 该玻璃粉末横向于所述割炬的射流被供给到所述割炬; 因为在每层沉积之后，所述棒被拉伸以使其直径达到接近或等于初始直径的值; 并且在每层沉积后，玻璃粉末的化学成分发生变化。 通过本方法获得的预制件使得可以通过绘制用于信息传输领域的光波导来制造。