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Proceedings Paper

Compact integrated optical directional coupler with large cross section silicon waveguides
Author(s): J. P. George; N. Dasgupta; B. K. Das
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Paper Abstract

Compact integrated optical directional couplers with symmetrically- and asymmetrically etched S-bend waveguides on SOI platform have been designed, fabricated and characterized. We have found that the directional couplers with asymmetrically etched waveguide structures can increase the device compactness to about 4 to 5 times that of the conventional symmetrically etched bend waveguide structures without compromising much on the optical loss budgets. The over all waveguide loss and loss per S-bend have been measured to be ~ 0.5 dB/cm and ~ 1 dB, respectively. The directional couplers are found to be polarization dependent (up to ~ 2 dB) and nearly wavelength independent (1510 nm < λ < 1600 nm).

Paper Details

Date Published: 17 May 2010
PDF: 8 pages
Proc. SPIE 7719, Silicon Photonics and Photonic Integrated Circuits II, 77191X (17 May 2010); doi: 10.1117/12.854517
Show Author Affiliations
J. P. George, Indian Institute of Technology Madras (India)
N. Dasgupta, Indian Institute of Technology Madras (India)
B. K. Das, Indian Institute of Technology Madras (India)

Published in SPIE Proceedings Vol. 7719:
Silicon Photonics and Photonic Integrated Circuits II
Giancarlo Cesare Righini, Editor(s)

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