Hu S, Bai X R, Li S S, et al. Optimization of Multiple-Phase-Shifted and Interleaved Sampled Fiber Gratings Filter[J]. Study on Optical Communications, 2024(3):230002.
Hu S, Bai X R, Li S S, et al. Optimization of Multiple-Phase-Shifted and Interleaved Sampled Fiber Gratings Filter[J]. Study on Optical Communications, 2024(3):230002. DOI: 10.13756/j.gtxyj.2024.230002.
Optimization of Multiple-Phase-Shifted and Interleaved Sampled Fiber Gratings Filter
Sampled optical Fiber Bragg Grating (SFBG) has attracted wide-spread attention and become a new focus in the research of optical fiber grating technology. The research work on designing optical filters with high channel numbers
flat tops
and narrow pass bands is of great importance in practical situation. Consequently
an Multi-Phase Shift Interpolated Sampling optical Fiber Grating (MPS-ISFBG) filter is proposed.
【Methods】
2
ISFBG has a large number of reflection channels and can introduce multiple flat top narrow transmission channels by inserting multi-phase shift. By optimizing the location of the two π phase-shift distributions of the inserted ISFBGs
an optical filters with 41 transmission channels was designed which covers the C-band with a channel interval of 100 GHz. Each channel has a flat-top response
a narrow 3 dB bandwidth (<1 GHz) and a small shape factor (<3.2). With structure parameters unchanged
three π phase shifts are inserted
which can further reduce the shape factor
thus improving the rectangular shape of the transmission channel. Finally
doubling the number of channels with half of the channel interval is achieved by introducing the MPS technique and inserting three π phase shifts into the ISFBG.
【Results】
2
The filter with 81 channels flat-top narrow bandwidth covering the C-bands with 50 GHz channel spacing is demonstrated. The 3-dB bandwidths of the multiple channels are 900.5 MHz and the shape factors are close to 2.17. Meanwhile
the effect of the magnitude of the multiphase shift
the location and the equivalent length of the fiber on the actual fabrication is discussed.
【Conclusion】
2
The designed filter has a large number of channels. Each channel has a flat-top response and narrow bandwidth
in line with the design purpose. Such filters have potential applications in multi-wavelength lasers and multi-wave microwave signal processing systems.
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Microwave Photonic Link with Non-Chromatic Dispersion and Large Dynamic Range Based on Phase Modulation
Noise Performance of All-Optical Quaternary Doubling and Subtraction Functions Based on Phase Inter-Modulation in Four-Wave Mixing Process
The modulation principle of optical differential 8-phase shift keying and its simulation
Related Author
ZHANG Ming-chen
XU En-ming
ZHANG Xin-yue
WU Bao-jian
GENG Yong
WEN Feng
QIU Kun
Chen Fei
Related Institution
School of Optoelectronic Engineering,Nanjing University of Posts and Telecommunications
Key Lab of Optical Fiber Sensing and Communications,Ministry of Education,School of Communication&Information Engineering,University of Electronic Science and Technology of China
The School of Natural Science,Beijing University of Posts and Telecommunications,Key Laboratory of Optical Communication and Lightwave Technologies,the Ministry of Education