Related Experiment Video
Updated: Dec 26, 2025
09:57
Multiplex Chemical Imaging Based on Broadband Stimulated Raman Scattering Microscopy
Published on: July 25, 2022
4.4K
Raman-induced pulse destabilization and bistability in an all-normal dispersion oscillator.
Optics Letters
|March 13, 2020
Summary
Stimulated Raman scattering in fiber lasers causes spectral changes and bistable operation. This study explores these effects in an all-normal dispersion oscillator, observing two stable states and power hysteresis.
Area of Science:
- Fiber optics
- Nonlinear optics
- Laser physics
Background:
- All-normal dispersion fiber oscillators are crucial for generating ultrashort pulses.
- Stimulated Raman scattering (SRS) can significantly influence spectral characteristics in optical systems.
Purpose of the Study:
- To experimentally investigate spectral modulations induced by SRS in an all-normal dispersion fiber oscillator.
- To analyze the impact of SRS on laser pulse spectra and operational stability.
- To explore the potential for bistable operation under high pump powers.
Main Methods:
- Utilized an all-fiber all-normal dispersion oscillator setup.
- Employed dispersive Fourier transform (DFT) for single-shot spectral recording.
- Analyzed spectral modulations and operational states across varying pump powers.
Main Results:
- Observed spectral modulations in the long-wavelength region due to SRS, without compromising single-pulse generation.
- Identified bistable operation at high pump powers.
- Detected two distinct stable dissipative soliton mode-locked states.
- Confirmed output power hysteresis associated with the bistable states.
Conclusions:
- SRS destabilizes the long-wavelength spectrum but preserves the oscillator's single-pulse regime.
- The oscillator exhibits bistable behavior, offering potential for tunable optical systems.
- Dissipative solitons and hysteresis are key features of the observed bistable operation.
Related Concept Videos
01:30Oscillations In An LC Circuit
2.9K
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
2.9K
01:20Raman Spectroscopy: Overview
1.2K
The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
1.2K
01:06Forced Oscillations
7.5K
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.
7.5K
01:30RLC Circuit as a Damped Oscillator
2.0K
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...
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...
2.0K
01:17Design Example: Underdamped Parallel RLC Circuit
573
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...
Starting with a fixed...
573
01:26Raman Spectroscopy Instrumentation: Overview
920
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
920