Strong <formula formulatype="inline"><tex Notation="TeX">$\hbox{LP}_{01}$</tex></formula> and <formula formulatype="inline"><tex Notation="TeX">$\hbox{LP}_{11}$</tex></formula> Mutual Coupling Conversion in a Two-Mode Fiber Bragg Grating
oleh: Chuang Wu, Zhengyong Liu, Kit Man Chung, Ming-Leung Vincent Tse, Florence Y. M. Chan, Alan Pak Tao Lau, Chao Lu, Haw-Yaw Tam
| Format: | Article |
|---|---|
| Diterbitkan: | IEEE 2012-01-01 |
Deskripsi
A fiber Bragg grating is inscribed in a two-mode fiber using a 193-nm excimer laser and a phase mask. Strong LP<sub>01</sub> and LP<sub>11</sub> mutual coupling as large as -22.5 dB, which corresponds to a modal conversion efficiency of more than 99%, is experimentally achieved. The intermodal coupling mechanism is theoretically analyzed through a finite element method. This device can be used as a low-cost reflective LP<sub>01</sub> ↔ LP<sub>11</sub> converter.