Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

RLC Circuit as a Damped Oscillator01:30

RLC Circuit as a Damped Oscillator

An RLC circuit combines a resistor, inductor, and capacitor, connected in a series or parallel combination.
Consider a series RLC circuit. Here, the presence of resistance in the circuit leads to energy loss due to joule heating in the resistance. Therefore, the total electromagnetic energy in the circuit is no longer constant and decreases with time. Since the magnitude of charge, current, and potential difference continuously decreases, their oscillations are said to be damped. This is...
Design Example: Underdamped Parallel RLC Circuit01:17

Design Example: Underdamped Parallel RLC Circuit

Consider designing an oscillator circuit, a crucial component in various electronic devices and systems. The objective is to create an oscillator circuit with specific characteristics: a damped natural frequency of 4 kHz and a damping factor of 4 radians per second. To accomplish this, a parallel RLC circuit is employed, known for its ability to sustain oscillations at a resonant frequency. In this case, the damping factor is pivotal in achieving the desired performance.
Starting with a fixed...
Forced Oscillations01:06

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.
Characteristics of Series Resonant Circuit01:24

Characteristics of Series Resonant Circuit

Series resonance occurs in a circuit containing inductive (L), capacitive (C), and resistive (R) elements connected sequentially. At the resonance frequency, the inductive and capacitive reactances are equal in magnitude but opposite in sign, effectively canceling each other. This causes the circuit's impedance is minimal, primarily determined by the resistance R. The resonant frequency of an RLC circuit is defined as:
RLC Series Circuits01:30

RLC Series Circuits

An RLC series circuit comprises an inductor, a resistor, and a charged capacitor connected in series. When the circuit is closed, the capacitor begins to discharge through the resistor and inductor by transferring energy from the electric field to the magnetic field. Here, the resistor connected to the circuit causes energy losses; therefore, on the complete discharge of the capacitor, the magnetic field energy acquired by the inductor is less than the original electric field energy of the...
Concept of Resonance and its Characteristics01:19

Concept of Resonance and its Characteristics

If a driven oscillator needs to resonate at a specific frequency, then very light damping is required. An example of light damping includes playing piano strings and many other musical instruments. Conversely, to achieve small-amplitude oscillations as in a car's suspension system, heavy damping is required. Heavy damping reduces the amplitude, but the tradeoff is that the system responds at more frequencies. Speed bumps and gravel roads prove that even a car's suspension system is not immune...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Nanophotonic neural probes for in vivo photostimulation, electrophysiology, and microfluidic delivery.

Microsystems & nanoengineering·2026
Same author

Broadband waveguide-coupled photodetectors in a submicrometer-wavelength silicon photonics platform.

Optics express·2026
Same author

Thermally induced refractive index trimming of visible-light silicon nitride waveguides using suspended heaters.

Optics express·2025
Same author

<i>In situ</i> thermal trimming of waveguides in a standard active silicon photonics platform.

Optics express·2025
Same author

Single-lobe steering of blue light with an active optical phased array.

Optics letters·2025
Same author

Foundry-fabricated dual-color nanophotonic neural probes for photostimulation and electrophysiological recording.

Neurophotonics·2025

Related Experiment Video

Updated: Jun 30, 2026

Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators
09:46

Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators

Published on: August 8, 2025

Dynamics of microring resonator modulators.

Wesley D Sacher1, Joyce K S Poon

  • 1Department of Electrical and Computer Engineering and Institute for Optical Sciences, University of Toronto, Toronto, Ontario, M5S 3G4, Canada. wesley.sacher@utoronto.ca

Optics Express
|October 1, 2008
PubMed
Summary
This summary is machine-generated.

Modulating microring resonators by varying coupling strength, not refractive index or loss, enables higher intensity modulation bandwidths approaching the free spectral range. This allows for faster optical modulator operation.

More Related Videos

Fabrication and Testing of Microfluidic Optomechanical Oscillators
09:10

Fabrication and Testing of Microfluidic Optomechanical Oscillators

Published on: May 29, 2014

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
12:18

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Related Experiment Videos

Last Updated: Jun 30, 2026

Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators
09:46

Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators

Published on: August 8, 2025

Fabrication and Testing of Microfluidic Optomechanical Oscillators
09:10

Fabrication and Testing of Microfluidic Optomechanical Oscillators

Published on: May 29, 2014

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
12:18

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Area of Science:

  • Photonics
  • Optical Engineering
  • Materials Science

Background:

  • Microring resonators are key components in integrated photonics for modulation.
  • Current modulation techniques face bandwidth limitations.

Purpose of the Study:

  • To develop a dynamic model for microring modulator transmission.
  • To investigate limitations on intensity modulation bandwidth.
  • To identify optimal modulation strategies for high-speed operation.

Main Methods:

  • Derived a dynamic model for microring modulator transmission.
  • Analyzed modulation based on refractive index, loss, and coupling strength variations.
  • Simulated modulator performance under different modulation schemes.

Main Results:

  • Modulation bandwidths near the free spectral range are achievable by varying waveguide-ring coupling strength.
  • Modulating refractive index or loss yields lower bandwidths.
  • Controlled coupling enables resonant modulators to operate at frequencies significantly exceeding the resonator linewidth.

Conclusions:

  • Varying waveguide-ring coupling strength is a superior method for enhancing microring modulator bandwidth.
  • High-quality factor resonant modulators can be designed for ultra-high-frequency operation.
  • Dynamic modeling provides insights into optimizing modulator performance.