Bending Loss Characteristics of MQW Optical Waveguides

Takuya AIZAWA  K. G. RAVIKUMAR  Masaaki AKIYAMA  Tsutomu WATANABE  Toshisada SEKIGUCHI  Masahiro AGATA  Ryozo YAMAUCHI  

IEICE TRANSACTIONS on Electronics   Vol.E77-C   No.1   pp.50-55
Publication Date: 1994/01/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Optical Interconnection)
multi-quantum well,  bending loss,  photonic integrated circuit,  bend waveguide,  directional coupler,  

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Optical waveguides are one of the key devices for photonic integrated circuits considered to be one of the candidates for optical interconnects. In particular lossless bend type waveguides are necessary to integrate different optical devices monolithically. In this paper, we report on the bending loss characteristics of the multi-quantum well bend waveguide with respect to the bend radius and lateral optical mode confinement. We show that to decrease the bending loss to less than 0.5 dB, it is necessary to increase either the confinement or the bend radius. For an example, when the confinement is around 85%, the bend radius should be more than 2 mm. We also show the application of the S-bend waveguides to directional coupler type optical switch.