Optical device having two optical waveguides connected and a met

Details Optical device having two optical waveguides connected and a met Optical device having two optical waveguides connected and a met

1993-08-24

1995-04-25

Bovernick, Rodney B.

Optical waveguides

With optical coupler

385 27, 385 50, 385 29, G02B 626

Patent

active

054106230

ABSTRACT:
An optical device includes: a first dielectric slab waveguide having an effective refractive index N.sub.1 ; a second dielectric slab waveguide having an effective refractive index N.sub.2 ; and a third dielectric slab waveguide having a length 1 and an effective refractive index N.sub.3, the third dielectric slab waveguide being formed between the first dielectric slab waveguide and the second dielectric slab waveguide so as to connect the first dielectric slab waveguide with the second dielectric slab waveguides optically; wherein the length I and the effective refractive index N.sub.3 substantially satisfy following equations; ##EQU1## where .lambda. is a free-space wavelength of light traveling in the optical device and the light travels from the first dielectric slab waveguide to the third dielectric slab waveguide at an incident angle .THETA. in a single mode.

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Capsalis, C. N., et al., "Theoretical analysis of a coated single-mode fiber termination" International Journal of Infrared and Millimeter Waves (1990) 11(9):1073-1097 Sep.
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Kamminga, W., et al., "Experiences with finite element calculations of waveguide coupling problems" Optics Communications (1990) 77(5,6):423-434 Jul.
J. Yamakita et al., "Analysis of discontinuities in dielectric waveguides using hypothetical periodicity" The Transactions of the Institute of Electronics, Information and Communication Engineers (Jul. 1991) vol. J74-C-I, No. 7, pp. 258-263.

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