Title :
Fabrication of wavelength-insensitive 8*8 star coupler
Author :
Okamoto, K. ; Takahashi, H. ; Yasu, M. ; Hibino, Y.
Author_Institution :
Opto-electron. Lab., Ibaraki, Japan
Abstract :
The fabrication and performance of a wavelength-insensitive 8*8 star coupler is described. The integrated-optic star coupler consists of two fan-shaped channel waveguide arrays facing each other and a slab waveguide region located in between. The wavelength-insensitive light splitting was realized by properly tailoring the mode coupling in the input array region. The coupler exhibits low-average excess losses of alpha =1.4 dB (standard deviation sigma =0.40 dB) at lambda =1.3 mu m and alpha =1.7 dB ( sigma =0.44 dB) at lambda = 1.55 mu m, respectively.<>
Keywords :
integrated optics; optical couplers; optical workshop techniques; 1.3 micron; 1.4 dB; 1.55 micron; 1.7 dB; 8 by 8 coupler; fabrication; fan-shaped channel waveguide arrays; input array region; integrated-optic star coupler; light splitting; low-average excess losses; mode coupling; performance; slab waveguide region; wavelength-insensitive 8*8 star coupler; Coupling circuits; Fabrication; Optical arrays; Optical coupling; Optical losses; Optical receivers; Optical waveguides; Slabs; Waveguide discontinuities; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
