Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Passive Filters

Passive Filters

Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...

Series Resonance

Series Resonance

The RLC circuit impedance is defined as the ratio of the supply voltage to the circuit current. Resonance in such a circuit occurs when the imaginary part of this impedance equals zero. This specific condition means that the inductive reactance is exactly equal to the capacitive reactance. The frequency at which this happens is known as the resonant frequency. Mathematically, the resonant frequency is inversely proportional to the square root of the product of the inductance (L) and capacitance...

Parallel Resonance

Parallel Resonance

The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:

Active Filters

Active Filters

Active filters are electronic circuits that use operational amplifiers (op-amps), resistors, and capacitors to filter out unwanted frequency components from a signal. A first-order low-pass active filter is designed to pass signals with a frequency lower than a certain cutoff frequency and attenuate frequencies higher than that cutoff frequency. The transfer function for a first-order low-pass active filter is:

Characteristics of Series Resonant Circuit

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:

Design Example: Underdamped Parallel RLC Circuit

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...

You might also read

Related Articles

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

Sort by

Same author

Still Hurting: Low Back Pain Presentations in the Emergency Department: A Retrospective Observational Study With a Cross-Sectional Follow-Up Survey.

Pain research & management·2026

Same author

Experimental demonstration of logical magic state distillation.

Nature·2025

Same author

Simple analysis of Gaussian pulses and beams in mode-locked lasers.

Applied optics·2024

Same author

Mode-Locked Fiber Laser Sensors with Orthogonally Polarized Pulses Circulating in the Cavity.

Sensors (Basel, Switzerland)·2023

Same author

Phase Nanoscopy with Correlated Frequency Combs.

Sensors (Basel, Switzerland)·2023

Same author

Measurement of delayed fluorescence in N<sub>2</sub> <sup>+</sup> with a streak camera.

Optics express·2022

Search research articles

Related Experiment Video

Updated: Aug 10, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Control of Frequency Combs with Passive Resonators.

James Hendrie¹, Ning Hsu¹, Jean-Claude Diels²

¹School of Optical Science and Engineering, University of New Mexico, Albuquerque, NM 87106, USA.

Sensors (Basel, Switzerland)

|February 11, 2023

Summary

Researchers precisely tuned optical frequency combs using nested etalons and two synchronized cavities. This method allows for accurate prediction and control of comb frequencies, demonstrated by observing 87Rb fluorescence.

Keywords:

gyroscopes inertial sensors intracavity phase interferometry laser sensors precision sensing ultrafast

More Related Videos

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

Related Experiment Videos

Last Updated: Aug 10, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

Area of Science:

Physics
Optical Engineering
Quantum Optics

Background:

Optical frequency combs are crucial for precision measurements.
Generating tailored combs requires precise control over cavity modes.
Nesting passive etalons within mode-locked oscillators offers a method for comb tailoring.

Purpose of the Study:

To demonstrate the generation of tailored optical frequency combs.
To precisely predict and tune comb frequencies.
To validate the comb generation and tuning using atomic transitions.

Main Methods:

Nesting passive etalons within a mode-locked oscillator.
Utilizing self-synchronized locking of two optical cavities.
Employing a temporal ABCD matrix method for comb prediction.
Scanning the D1 transition line of 87Rb and observing fluorescence for tuning validation.

Main Results:

Generation of a 6.8 GHz optical frequency comb with 106 MHz side-bands.
Precise prediction of tailored comb frequencies was achieved.
Successful demonstration of comb frequency tuning by observing 87Rb fluorescence.

Conclusions:

Tailored optical frequency combs can be reliably generated and predicted.
The demonstrated method offers precise control over comb generation and tuning.
This technique has potential applications in high-precision spectroscopy and metrology.