Optimization of spatial filter with volume Bragg gratings in photo-thermo-refractive glass

Optimization of spatial filter with volume Bragg gratings in photo-thermo-refractive glass

We present a method for optimizing spatial filter performance by inserting volume Bragg gratings (VBGs) in front of the traditional spatial filters. The experimental results show that the cutoff frequency is modified with the insertion of VBGs. We also demonstrate the optimization of filtering perfo...

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Veröffentlicht in:Optics letters 2014-02, Vol.39 (3), p.663-665
Hauptverfasser: Zhang, Xiang, Yuan, Xiao, Feng, Jiansheng, Gao, Fan, Xiong, Baoxing, Zou, Kuaisheng
Format: Artikel
Sprache:eng
Schlagworte:
Bragg gratings
Density
Filtering
Filtration
Insertion
Laser beams
Modulation
Optimization
Spectra
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Zusammenfassung:We present a method for optimizing spatial filter performance by inserting volume Bragg gratings (VBGs) in front of the traditional spatial filters. The experimental results show that the cutoff frequency is modified with the insertion of VBGs. We also demonstrate the optimization of filtering performance in both the spatial and frequency domains, with detailed comparison of near-field modulation, contrast ratio, and power spectral density of output laser beams.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.39.000663