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Updated: May 22, 2026

Quasi-light Storage for Optical Data Packets

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

All-optical switch using optically controlled two mode interference coupler.

Partha Pratim Sahu¹

¹Department of Electronics and Communication Engineering, Tezpur University, Assam, India. pps@tezu.ernet.in

|May 23, 2012

Summary

This summary is machine-generated.

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This study presents an optically controlled two-mode interference (OTMI) coupler for all-optical switching. The novel silicon-core device demonstrates efficient switching with reduced length and improved tolerance to fabrication variations.

Area of Science:

Photonics and Optical Engineering
Semiconductor Devices
Integrated Optics

Background:

All-optical switches are crucial for high-speed optical communication networks.
Two-mode interference (TMI) couplers offer potential for optical switching applications.
Existing TMI devices face challenges in terms of length and fabrication sensitivity.

Purpose of the Study:

To introduce a novel optically controlled two-mode interference (OTMI) coupler.
To demonstrate all-optical switching using refractive index modulation.
To analyze the performance and fabrication tolerance of the proposed OTMI switch.

Main Methods:

Development of a silicon-core and GaAsInP-cladding waveguide structure.
Utilizing optical pulse injection into the cladding to modulate refractive index.

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Employing a mathematical model based on sinusoidal modes to study coupling characteristics.

Main Results:

Successful demonstration of optically controlled switching operation.
Achieved a shorter device length compared to previous TMI couplers.
Showcased minimal increase in crosstalk despite fabrication tolerances (±δw).

Conclusions:

The proposed OTMI coupler serves as an effective all-optical switch.
The device offers advantages in terms of size and robustness against fabrication errors.
This work contributes to the advancement of integrated photonic switching technologies.