公开(公告)号：US20040085623A1

公开(公告)日：2004-05-06

申请号：US10671482

申请日：2003-09-29

Applicant: ALCATEL

Inventor： Lionel Provost ,  Christian Simonneau ,  Isabelle Bongrand ,  Philippe Bousselet ,  Christine Moreau ,  Dominique Bayart ,  Laurent Gasca

IPC: H01S003/00

CPC classification number: H01S3/06708 ,  H01S3/06729 ,  H01S3/06754 ,  H01S3/094007

Abstract: An optical fiber amplifier is considered comprising a mono-mode core, a first cladding around said core and at least a further cladding around said first cladding while said first cladding includes a ring shaped active region doped with rare earth material surrounding said mono-mode core. Advantageously, the first cladding is designed with a radial refractive index following an almost continuous decreasing function for increasing radius. The use of a continuously decreasing refractive index for the cladding at the outer border of the ring shaped active medium optimize the efficiency of the coupling between the core and the cladding.

Abstract translation: 认为光纤放大器包括单模芯，围绕所述芯的第一包层和围绕所述第一包层的至少另一包层，而所述第一包层包括掺杂有围绕所述单模芯的稀土材料的环形有源区 。 有利地，第一包层被设计成具有径向折射率，跟随用于增加半径的几乎连续的减小函数。 在环形有源介质的外边界处对包层的连续降低的折射率的使用优化了芯和包层之间的耦合的效率。

公开(公告)号：US20040096172A1

公开(公告)日：2004-05-20

申请号：US10671775

申请日：2003-09-29

Applicant: ALCATEL

Inventor： Isabelle Bongrand ,  Laurent Gasca ,  Gilles Melin ,  Ambre Peyrilloux ,  Lionel Provost ,  Pierre Sansonetti

IPC: G02B006/02

CPC classification number: G02B6/02347 ,  G02B6/02361 ,  G02B6/105

Abstract: The object of the present invention is to design a photonic crystal fiber with high birefringence property such to preserve the polarization of optical signals transmitted through such fiber without implying to high manufacturing cost. For that a photonic crystal fiber is designed having at least the inner rows of the used longitudinal holes surrounding its guiding core following a parallelogram shape arrangement. This leads to a photonic crystal with an at most two fold rotational symmetry about a longitudinal symmetry. It is a particularly advantageous way to introduce a high birefringence which will guarantee to retain the polarisation of the transmitted optical signals.

Abstract translation: 本发明的目的是设计具有高双折射特性的光子晶体光纤，以保持通过这种光纤传输的光信号的偏振，而不意味着高的制造成本。 为此，光子晶体光纤被设计成具有围绕其引导核心的所使用的纵向孔的至少内排，遵循平行四边形形状布置。 这导致关于纵向对称性具有至多两倍旋转对称的光子晶体。 引入高双折射的特别有利的方式将保证保持透射光信号的偏振。