Panda-type few-mode fiber-enabled microwave photonic filter with a reconfigurable finite impulse response
| Autor: | Yuncai Wang, Lei Zhu, Yuwen Qin, Yao Zhang, Jitao Gao, Songnian Fu |
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| Rok vydání: | 2021 |
| Předmět: |
Physics
Spatial light modulator Finite impulse response business.industry Optical communication 02 engineering and technology Polarization-division multiplexing 021001 nanoscience & nanotechnology 01 natural sciences Multiplexing Atomic and Molecular Physics and Optics 010309 optics Optics Band-pass filter Transmission (telecommunications) 0103 physical sciences Hardware_ARITHMETICANDLOGICSTRUCTURES 0210 nano-technology business Free spectral range |
| Zdroj: | Optics letters. 46(8) |
| ISSN: | 1539-4794 |
| Popis: | Leveraging various physical dimensions of optical signals allows significant scaling of the transmission capacity for optical communications. Here we experimentally demonstrate a reconfigurable microwave photonic filter (MPF) enabled by both mode and polarization division multiplexing arising in a Panda-type few-mode fiber. The L P 01 x , L P 01 y , L P 11 x , and L P 11 y modes are used to realize optical true-time delay lines of the MPF, thus achieving a four-tap finite impulse response (FIR) with a free spectral range of around 2.22 GHz. Due to the employed delay between two orthogonal polarizations, the number of taps arising in its FIR can be doubled. Moreover, the reconfigurable FIR of the MPF can be achieved by loading the corresponding phase pattern onto a spatial light modulator. Finally, the low-pass FIR can be switched to the bandpass FIR due to the introduction of polarization modulation, indicating the flexible manipulation of the FIR for the multi-dimensional division multiplexing enabled MPF. |
| Databáze: | OpenAIRE |
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