Related Experiment Video
Updated: Aug 10, 2025
12:18
Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
17.1K
Kerr soliton frequency comb generation by tuning the coupling coefficient in coupled nonlinear microcavities
Optics Express
|February 14, 2023
Summary
This study introduces a novel on-chip soliton frequency comb generation method using coupled microcavities. By tuning the coupling coefficient, researchers achieved soliton generation without complex pump lasers, paving the way for integrated photonic devices.
Area of Science:
- Photonics
- Nonlinear Optics
- Integrated Optics
Background:
- Kerr soliton frequency combs are vital for on-chip sources.
- Current methods using single microcavities are difficult to integrate due to complex pump requirements.
Purpose of the Study:
- To propose and demonstrate a new on-chip soliton comb generation scheme.
- To enable integrated soliton sources by avoiding tunable CW or pulsed pump lasers.
Main Methods:
- Numerical simulations of coupled microcavity systems.
- Tuning the coupling coefficient between two identical microcavities.
- Utilizing a Sagnac loop structure to couple modes within a single microcavity.
Main Results:
- Kerr comb generation was achieved in both blue and red detuned regions.
- The coupling coefficient significantly influences the soliton generation region's range and boundaries.
- Demonstrated comb generation by tuning the coupling coefficient in a Sagnac loop configuration.
Conclusions:
- The proposed coupled microcavity scheme offers a viable route for on-chip soliton comb generation.
- This method simplifies integration by eliminating the need for complex pump lasers.
- The Sagnac loop design further enhances the potential for chip-scale integrated soliton comb sources.
Related Concept Videos
01:28Standing Waves in a Cavity
977
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
977
01:30Oscillations In An LC Circuit
2.4K
An idealized LC circuit of zero resistance can oscillate without any source of emf by shifting the energy stored in the circuit between the electric and magnetic fields. In such an LC circuit, if the capacitor contains a charge q before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor. This energy is given by
2.4K
01:08Spin–Spin Coupling Constant: Overview
980
In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
980
01:12Double Resonance Techniques: Overview
257
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Spin decoupling is usually achieved by...
257
01:14Sound Waves: Resonance
2.6K
Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...
2.6K
01:20Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)
1.1K
Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
1.1K