A novel dynamic LPFG gain equalizer written in a bend-insensitive fiber
| Autor: | Ai-Zi Hu, Y.C. Niu, Yunjiang Rao |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Optical amplifier
Optical fiber Materials science business.industry Flatness (systems theory) Optical communication Physics::Optics Bending Long-period fiber grating Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Optics law Fiber Sensitivity (control systems) Electrical and Electronic Engineering Physical and Theoretical Chemistry business |
| Zdroj: | Optics Communications. 244:137-140 |
| ISSN: | 0030-4018 |
| Popis: | The bending characteristics of the long-period fiber gratings (LPFG) induced by high-frequency CO 2 laser pulses using a bend insensitive fiber is reported, for the first time, to our knowledge. The experimental results show that the resonant peak amplitude of the LPFG written in a bend insensitive fiber is quite sensitive to bending while its resonant wavelength is insensitive to bending at some circular orientations. In addition, the resonant peak amplitude of the LPFG written in a bend insensitive fiber has a much higher bend sensitivity than that written in a standard telecommunication fiber. Based on this finding, a novel all-fiber dynamic gain equalizer is proposed to flatten the gain of EDFAs by controlling the bend of the LPFG directly. The experimental results show that such a device would be a practical and simple approach to realize gain flattening of an EDFA with a high precision for gain flatness control. |
| Databáze: | OpenAIRE |
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