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Related Experiment Video

Updated: Jun 17, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

A bi-stable 2x2 optical switch monolithically integrated with variable optical attenuators.

Bo-Ting Liao¹, Hsin-Hong Shen, Hsin-Hung Liao

¹Department of Mechanical Engineering, National Taiwan University No 1 Roosevelt Rd. Sec 4, Taipei, Taiwan.

|December 10, 2009

Summary

This summary is machine-generated.

This study introduces a novel micromachined optical switch with integrated variable optical attenuators, simplifying fabrication. The device offers efficient optical signal switching and power attenuation with low insertion loss and crosstalk.

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Quasi-light Storage for Optical Data Packets

Quasi-light Storage for Optical Data Packets

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Last Updated: Jun 17, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

Quasi-light Storage for Optical Data Packets

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Area of Science:

Photonics and Optical Engineering
Microelectromechanical Systems (MEMS)

Background:

Optical switches and variable optical attenuators are crucial components in optical communication networks.
Integrating multiple optical functions into a single device can reduce complexity and cost.

Purpose of the Study:

To develop a novel micromachined 2x2 optical switch monolithically integrated with variable optical attenuators.
To achieve this integration using a standard manufacturing process with a single photo mask.

Main Methods:

Utilized a split-cross-bar (SCB) configuration to simplify fabrication and eliminate layout constraints.
Employed four movable mirrors, two bi-stable mechanisms, and six actuators for switching and attenuation.
Incorporated simple in-plane motions for sub-component actuation.

Main Results:

Achieved low measured insertion losses of approximately 1.0-1.1 dB for both channels.
Demonstrated crosstalk below -60 dB.
Obtained an attenuation range of about 30 dB with a maximum applied voltage of 20 V.
Measured a switching time of less than 4 ms.

Conclusions:

The proposed split-cross-bar (SCB) configuration enables the monolithic integration of optical switches and variable optical attenuators.
The device is manufacturable via a standard process with a single photo mask, reducing fabrication complexity.
The integrated device exhibits excellent performance characteristics, including low loss, low crosstalk, and fast switching times.