We describe an electronically tunable intracavity filter, based on the acoustooptic effect, that suppresses the sideband instabilities in a free electron laser. Different configurations are analyzed, and the problems encountered in the design and construction of a broadband acoustic transducer are discussed in some detail. In addition, some preliminary experimental results on the construction of broadband acoustic transducers are reported. The main advantages of this device are high damage threshold, low insertion losses, good tunability, and easy handling.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/AO.27.003619 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Hydrodynamic modulation instability triggered by a two-wave system.
Chaos
October 2024
Disaster Prevention Research Institute, Kyoto University, Uji, Kyoto 611-0011, Japan.
Article Synopsis
- Modulation instability (MI) causes regular nonlinear wave trains to break down, potentially resulting in localized phenomena like rogue waves across various nonlinear dispersive media, including hydrodynamics and optics.
- The classical MI dynamics can start with small-amplitude sidebands around a main wave peak, often visualized as a three-wave interaction setup in experiments, but more complex patterns can emerge through breather solutions of the nonlinear Schrödinger equation (NLSE).
- This study explores MI in deep-water surface gravity waves, demonstrating that it can be initiated by just a single unstable sideband, yielding experimental results that align closely with nonlinear simulations, while also indicating shifts in focusing cycle behavior observed in longer-term wave evolution.
Experimental investigation on coupled-bunch instability and suppression for the upgrade of Beijing Electron-Positron Collider (BEPCII).
Rev Sci Instrum
July 2024
Wuhan University, Wuhan 430072, China.
After touching the design collision luminosity of 1.0 × 1033 cm-2 s-1 in 2016, this target has not been reached again for the upgrade of Beijing Electron-Positron Collider during physical collision operation in subsequent years due to various factors, such as the collision background, noise, and equipment stability under high power operation. One of the most serious factors was the beam instability, especially the coupled-bunch instability, whose sideband distribution was clearly displayed on the spectrum analyzer when the feedback system was OFF.
View Article and Find Full Text PDFResonant Akhmediev breathers.
Sci Rep
May 2024
Photonics Devices and Systems Group, Singapore University of Technology and Design, 8 Somapah Rd., Singapore, 487372, Singapore.
Modulation instability is a phenomenon in which a minor disturbance within a carrier wave gradually amplifies over time, leading to the formation of a series of compressed waves with higher amplitudes. In terms of frequency analysis, this process results in the generation of new frequencies on both sides of the original carrier wave frequency. We study the impact of fourth-order dispersion on this modulation instability in the context of nonlinear optics that lead to the formation of a series of pulses in the form of Akhmediev breather.
View Article and Find Full Text PDFArticle Synopsis
- The study explores how high-order dispersion affects modulation instability, emphasizing general patterns instead of specific cases.
- High-order dispersion results in poor phase matching between the main waves and their sidebands, which hinders four-wave mixing processes.
- The findings align well with numerical simulations and indicate that high-order dispersion fundamentally limits the behavior of modulation instability.
The space-based gravitational wave detection mission, TianQin, requires high-level synchronization between independent clocks of all spacecrafts to extract the gravitational wave signals. It is necessary to measure the inter-spacecraft relative clock jitter based on laser phase-sideband clock transfer. The main challenge is the tracking and locking of clock sideband beatnote signals with low signal-to-noise ratio and frequency variation.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!