论文信息 - Improved coupling efficiency using /spl Delta/n-controlled polymer waveguides with two-dimensional spot-size transformation

Improved coupling efficiency using /spl Delta/n-controlled polymer waveguides with two-dimensional spot-size transformation

A new type of polymer waveguide for two-dimensional spot-size transformation is described. For this waveguide, while the core cross section in the waveguide is uniform, the /spl Delta/n is properly controlled along the direction of propagation such that the penetration of guided light beyond the core-cladding interface is controlled and spot-size is expanded two dimensionally at one end of the waveguide.

R. Inaba | N. Kato | H. Akahosti

[1] H. Hanafusa,et al. Connection loss reduction by thermally-diffused expanded core fiber , 1991, IEEE Photonics Technology Letters.

[3] M M Fejer,et al. Adiabatically tapered periodic segmentation of channel waveguides for mode-size transformation and fundamental mode excitation. , 1996, Optics letters.

[4] E Kapon,et al. Two-dimensional control of mode size in optical channel waveguides by lateral channel tapering. , 1991, Optics letters.

[5] Yasuko Yamada Maruo,et al. Channel-optical-waveguide fabrication based on electron-beam irradiation of polyimides. , 1995, Applied optics.

[6] Shigekuni Sasaki,et al. Embedded channel polyimide waveguide fabrication by direct electron beam writing method , 1995 .

[7] A Mahapatra,et al. Thermal tapering of ion-exchanged channel guides in glass. , 1988, Optics letters.

[8] S. Kawakami,et al. Beam expanding fiber using thermal diffusion of the dopant , 1990 .

[9] H. L. Cox,et al. Development of tapered glass coupling waveguides for source radiation input into multichannel LiNbO/sub 3/ modulator arrays , 1988 .

[10] Low-loss and large-tolerance fiber coupling of high- Delta silica waveguides by local mode-field conversion , 1993, IEEE Photonics Technology Letters.

[11] T. Shimizu,et al. Index-and-dimensional taper and its application to photonic devices , 1992 .

[12] E. Marcatili,et al. Dielectric tapers with curved axes and no loss , 1985 .