Wideband and continuously-tunable fractional photonic Hilbert transformer based on a single high-birefringence planar Bragg grating
| Autor: | Binchen Cai, Yu Yu, Pete Smith, James C. Gates, Li Shen, Deming Liu, Matthew T. Posner, Minming Zhang, Zhenggang Lian, Gao Yuan, Chaotan Sima, Zijing Zhang, Meng Huang, Bolan Liu |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Signal processing
Birefringence Materials science business.industry Physics::Optics 02 engineering and technology Atomic and Molecular Physics and Optics 020210 optoelectronics & photonics Planar Optics Apodization Fiber Bragg grating 0202 electrical engineering electronic engineering information engineering Wideband Photonics business Ultrashort pulse |
| Popis: | We propose and experimentally demonstrate wideband and continuously tunable fractional-order photonic Hilbert transformers (FrHT). These are realized by a single apodized planar Bragg grating within a high-birefringence planar substrate. The fractional order of the FrHT is continuously tuned and precisely controlled by changing the polarization state of the input light. The experimental characterization demonstrates an operating bandwidth up to 120 GHz with amplitude ripples below 3 dB. The optical phase shift response is directly measured to verify the proposed tuning property, demonstrating transform orders of around 1, 0.7, and 0.5. This approach is simple, stable, and compact compared to other existing methods and has great potential in the fields of ultrafast all-optical signal processing. |
| Databáze: | OpenAIRE |
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