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Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

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Arrayed waveguide collimators for integrating free-space optics on polymeric waveguide devices.

Jin-Soo Shin, Chang-Hee Lee, Sang-Yung Shin

|October 17, 2014

Summary

This summary is machine-generated.

This study introduces a novel waveguide collimator for optical communication systems. It simplifies passive alignment in array-type devices, reducing excess loss to below 1.0 dB.

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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Published on: April 1, 2020

Area of Science:

Photonics and Optical Engineering
Materials Science
Telecommunications

Background:

Array-type optical devices are crucial for compact and reliable wavelength-division multiplexing (WDM) optical communication systems.
Passive alignment of components like isolators, collimating lenses, and laser diodes in array configurations presents significant fabrication challenges.

Purpose of the Study:

To propose and demonstrate a waveguide collimator that facilitates the integration of array isolators.
To overcome the difficulties associated with passive alignment in array-type optical transmitter modules.

Main Methods:

Utilizing a low-contrast, large-core polymer waveguide to enlarge the guided mode and suppress diffraction.
Incorporating an adiabatic taper structure to mitigate fiber coupling loss caused by the enlarged mode.
Integrating the waveguide collimator with array isolators for transmitter modules.

Main Results:

The proposed waveguide collimator effectively suppresses diffraction of the guided mode in a free-space region.
An adiabatic taper successfully compensated for fiber coupling loss associated with the enlarged mode.
The waveguide collimator achieved an excess loss of less than 1.0 dB, including a 400-μm free-propagation region.

Conclusions:

The developed waveguide collimator offers a viable solution for simplifying passive alignment in array-type optical devices.
This approach enhances the feasibility of mass production and improves the reliability of WDM optical communication transmitter modules.
The low excess loss demonstrates the effectiveness of the proposed design for practical applications.