A dark hollow beam from a selectively liquid-filled photonic crystal fibre

• 作 者: 张美艳 李曙光 姚艳艳 付博 张磊
• 机 构: Key Laboratory of Metastable Materials Science and Technology,College of Science,Yanshan University,
• 出 处: Chinese Physics B
• 发表日期: 2010年04期
• 关键词: photonic fibre hollow filled cladding rotation filling guiding satisfy inserting

This paper reports that,based on the electromagnetic scattering theory of the multipole method,a high-quality hollow beam is produced through a selectively liquid-filled photonic crystal fibre.Instead of a doughnut shape,a typical hollow beam is produced by other methods;the mode-field images of the hollow-beam photonic crystal fibre satisfy sixth-order rotation symmetry,according to the symmetry of the photonic crystal fibre(PCF) structure.A dark spot size of the liquid-filled photonic crystal fibre-generated hollow beam can be tuned by inserting liquid into the cladding region and varying the photonic crystal fibre structure parameters.The liquid-filled PCF makes a convenient and flexible tool for the guiding and trapping of atoms and the creation of all-fibre optical tweezers.

This paper reports that, based on the electromagnetic scattering theory of the multipole method, a high-quality hollow beam is produced through a selective liquid-filled photonic crystal fiber, a typical hollow beam is produced by other methods; the mode-field images of the hollow-beam photonic crystal fiber sixth-order rotation symmetry, according to the symmetry of the photonic crystal fiber (PCF) structure. A dark spot size of the liquid-filled photonic crystal fiber-generated hollow beam can be tuned by inserting liquid into the cladding region and varying the photonic crystal structure parameters. The liquid-filled PCF makes a convenient and flexible tool for the guiding and trapping of atoms and the creation of all-fiber optical tweezers.