New nonlinear and dispersion flattened photonic crystal fiber with low confinement loss

✍ Scribed by Ming Chen; Shizhong Xie

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 244 KB
• Volume: 281
• Category: Article
• ISSN: 0030-4018
• DOI: 10.1016/j.optcom.2007.12.006

✦ Synopsis

A new nonlinear dispersion flattened photonic crystal fiber with low confinement loss is proposed. This fiber has threefold symmetry core. The doped region in the core and the big air-holes in the 1st ring can make high nonlinearity in the PCF. And the small air-holes in the 1st ring and the radial increasing diameters air-holes rings in cladding can be used to achieve the dispersion properties of the PCF. We can achieve the optimized optical properties by carefully selecting the PCFs structure parameters. A PCF with flattened dispersion is obtained. The dispersion is less than 0.8 ps/(nm km) and is larger than À0.7 ps/(nm km) from 1.515 lm to 1.622 lm. The nonlinear coefficient is about 12.6456 W À1 km À1 , the fundamental mode area is about 10.2579 lm 2 . The confinement loss is 0.30641 dB/km. This work may be useful for effective design and fabrication of dispersion flattened photonic crystal fibers with high nonlinearities.