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Forced Oscillations

Forced Oscillations

When an oscillator is forced with a periodic driving force, the motion may seem chaotic. The motions of such oscillators are known as transients. After the transients die out, the oscillator reaches a steady state, where the motion is periodic, and the displacement is determined.

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Related Experiment Video

Updated: Sep 3, 2025

Fabrication and Testing of Microfluidic Optomechanical Oscillators

Fabrication and Testing of Microfluidic Optomechanical Oscillators

Published on: May 29, 2014

Resonant-Opto-Thermomechanical Oscillator (ROTMO): A Low-Power, Large Displacement, High-Frequency Optically Driven

Simon Pevec¹, Denis Donlagic¹

¹Faculty of Electrical Engineering and Computer Science, University of Maribor, Koroska cesta 46, Maribor, SI-2000, Slovenia.

Small (Weinheim an Der Bergstrasse, Germany)

|July 23, 2022

Summary

This summary is machine-generated.

This study introduces a novel light-driven micromechanical oscillator. It achieves large displacements and high frequencies using low optical power, paving the way for new micro-opto-mechanical systems.

Keywords:

micro-opto-mechanical systems (MOMS)micro-oscillators microactuators micromachining optical actuation

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Area of Science:

Opto-mechanics
Microsystems engineering
Photonics

Background:

Micromechanical oscillators are crucial components in various microdevices.
Existing actuation methods often require significant power or complex fabrication.
There is a need for efficient, low-power actuation methods for micro-optomechanical systems.

Purpose of the Study:

To present a novel, light-driven micromechanical oscillator.
To demonstrate actuation using low optical power and achieving large mechanical displacements.
To explore the potential for high-frequency operation in such devices.

Main Methods:

Fabrication of an asymmetrically metal-coated optical microwire.
Configuration into a silica micromechanical oscillator.
Actuation via light absorption, thermal expansion, and resonant amplification.

Main Results:

The oscillator operates with low optical power (mW or µW range).
Achieved large mechanical displacements (5-100 µm).
Demonstrated tunable frequencies from sub-kHz to over 200 kHz.

Conclusions:

The developed optically driven micromechanical oscillator offers efficient, large-displacement actuation.
This technology provides a foundation for new actuated micro-opto-mechanical systems.
The design enables high-frequency operation with minimal optical power input.