Continuously Tunable Fractional Hilbert Transformer by Using a Single $\pi$-Phase Shifted FBG
| Autor: | Jianping Yao, Hiva Shahoei |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Physics
business.industry Order (ring theory) Polarizer Polarization (waves) Signal Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Weighting law.invention symbols.namesake Transformation (function) Optics Fiber Bragg grating law symbols Hilbert transform Electrical and Electronic Engineering business |
| Zdroj: | IEEE Photonics Technology Letters. 25:2225-2228 |
| ISSN: | 1941-0174 1041-1135 |
| DOI: | 10.1109/lpt.2013.2284574 |
| Popis: | A continuously tunable fractional Hilbert transformer (FHT) using a π-phase shifted fiber Bragg grating ( π-PSFBG) is proposed and experimentally demonstrated. An FHT has an output that is a weighted sum of the original input signal and its classical Hilbert-transformed signal. The classical Hilbert transform is implemented using a π-PSFBG. The output from the classical HT and the original input signal are controlled to be orthogonally polarized. The combination of the two signals at a polarizer would generate a weighted sum with the weighting coefficients determined by the angle between the principle axis of the polarizer and the polarization direction of the original input signal. A π-PSFBG is fabricated. The performance of the π-PSFBG as a classical HT is evaluated. The incorporation of the π-PSFBG into the proposed system to implement an FHT is studied. A continuously tunable FHT with a tunable fractional order of ρ = 0.7, 0.86, 0.92, 1, 1.06, 1.17, and 1.24 to perform Hilbert transformation of a Gaussian pulse with a temporal width of 80 ps is experimentally demonstrated. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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