Theoretical Design of Band Pass Filter Utilizing Long Period Fiber Grating Having Cladding Refractive Index Perturbation
| Autor: | Zhennao Cai, Xiukai Ruan, Jie Shen, Yaoju Zhang, Qiuping Ji, Zhihong Li |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
business.industry
Computer science Optical communication 02 engineering and technology Grating Long-period fiber grating Cladding (fiber optics) Ray Wavelength 020210 optoelectronics & photonics Optics Band-pass filter Control and Systems Engineering Signal Processing 0202 electrical engineering electronic engineering information engineering business Refractive index Software |
| Zdroj: | Automatic Control and Computer Sciences. 52:489-495 |
| ISSN: | 1558-108X 0146-4116 |
| DOI: | 10.3103/s014641161806010x |
| Popis: | In this work, theoretical design of a novel band pass filter based on the turning-around-point long period fiber grating (TAP-LPFG) having cladding index modulation is proposed and demonstrated. Cladding modes are excited by introducing the incident light into the fiber cladding of the input end of the TAP-LPFG. At the grating region, only those cladding modes that satisfy the phase matching condition couple back to the fiber core to obtain the band pass transmission. It is shown that a band pass filter with –3 dB width of from ~115 to ~198 nm with the center wavelength of ~1554.4 nm can be obtained, and the suppression of more than 10 dB for the side-lobes is achieved in a wide wavelength range. This novel TAP-LPFG based device can find applications in optical communications for wide band pass filter. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink