Theoretical analysis of ASE contrast improvement with a rapid scanning F–P interferometer in a CPA system

Ma, Zairu; Li, Shiwen

doi:10.1088/2040-8978/14/7/075202

Cited by 6 publications

(2 citation statements)

References 15 publications

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“…As a result, the SNR can be improved in harsh wireless environments where noise or interference is severe. A similar concept to dynamic RF filtering was proposed to filter out optical chirp pulses and to suppress amplified spontaneous noise through tunable optical filtering in chirped pulse amplification optical systems [42]. However, this concept was not presented for RF applications.…”

Section: Concept Of Dynamic Rf Filtering For Ultrabroadband Rf Smentioning

confidence: 99%

Rapidly Tunable Dual-Comb RF Photonic Filter for Ultrabroadband RF Spread Spectrum Applications

Kim

Leaird

Weiner

2016

IEEE Trans. Microwave Theory Techn.

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Abstract-We demonstrate a rapidly frequency-tunable radio frequency (RF) filter using microwave photonics technology for ultrawideband RF spread spectrum applications. A pair of electro-optic frequency combs is arranged as a dispersive tapped delay line in a differential detection configuration to implement a programmable finite impulse response RF filter. Our photonic scheme enables both fast frequency tuning on the order of tens of nanoseconds and wide tuning range (>7.5 GHz) with minimal variation of RF gain and passband shape. The low control voltage (ca. 1 V) and the linear relationship between control voltage and passband frequency facilitate agile frequency tuning for processing of signals with time-varying frequency content, while differential detection increases the photocurrent by a factor of two and suppresses common mode intensity noise. We exploit the rapid tunability of the implemented filter to demonstrate dynamic tracking of frequency-hopped and chirped RF signals. An experiment that performs dynamic filtering of an input chirp signal (3.92-GHz center frequency, up-chirped by >2 GHz within 100 ns) obscured by strong broadband noise achieves ∼11-dB signal-to-noise ratio (SNR) improvement. The SNR obtained is in addition to that available from standard matched filtering or pulse compression processing, suggesting strong potential for enhanced resistance against broadband noise jamming.

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Section: Concept Of Dynamic Rf Filtering For Ultrabroadband Rf Smentioning

confidence: 99%

Rapidly Tunable Dual-Comb RF Photonic Filter for Ultrabroadband RF Spread Spectrum Applications

Kim

Leaird

Weiner

2016

IEEE Trans. Microwave Theory Techn.

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“…A number of techniques have been proposed and investigated experimentally over the past 20 years aiming to improve the temporal contrast of high peak power laser systems. These methods include the application of saturable absorbers [12], a nonlinear Sagnac interferometer [13], a double CPA scheme [14], nonlinear birefringence [15], cross-polarization wave generation (XPW) [16], a low-gain optical parametric amplification (OPA) [17], self-diffraction (SD) process [18], secondharmonic generation [19], spatial chirp technique [20], methods based on nonlinear Fourier-filter [21], rapid scanning Fabry-Perot (F-P) interferometer [22], plasma mirrors [23], and picosecondpumped OPCPA (PS-OPCPA) [24]. Among these, XPW, plasma mirrors, and PS-OPCPA are the most promising techniques, which have already been applied combined or independently in several petawatt-class laser facilities around the world [25]- [30].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Phase-Conjugate Wave Generation as a Pulse Cleaner in Femtosecond Petawatt Laser Systems

et al. 2019

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We report on comprehensive research regarding the potential of phase-conjugate wave (PCW) generation via backward degenerate four-wave mixing process as a pulse cleaner in femtosecond high-power laser systems. We analyzed the performance of this technique by investigating the contrast enhancement capability, gain bandwidth, and energy conversion efficiency. All of these parameters are important in pulse cleaning. The numerical calculations verified that a considerably large efficiency bandwidth product and an excellent contrast enhancement capability can be realized by finding a balance between each physical effect. The simulation results based on this study provide guidance for the application of this technique in laser systems with different bandwidths. The method, which is based on PCW generation, provides new insights for femtosecond petawatt laser systems as pulse cleaners.

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A scanning filtering method for improving the SNR of chirped pulse based on the optical Kerr effect

Zhang

Zeng

et al. 2013

Optik

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Theoretical analysis of ASE contrast improvement with a rapid scanning F–P interferometer in a CPA system

Cited by 6 publications

References 15 publications

Rapidly Tunable Dual-Comb RF Photonic Filter for Ultrabroadband RF Spread Spectrum Applications

Rapidly Tunable Dual-Comb RF Photonic Filter for Ultrabroadband RF Spread Spectrum Applications

Numerical Investigation of Phase-Conjugate Wave Generation as a Pulse Cleaner in Femtosecond Petawatt Laser Systems

A scanning filtering method for improving the SNR of chirped pulse based on the optical Kerr effect

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