Nguyễn Thị Thủy * , Phạm Việt Tuấn , Lê Trần Uyên Tú , Nguyễn Thị Oanh Hoàng Trọng Đức

* Người chịu trách nhiệm về bài viết: (ntthuy@hueuni.edu.vn)

Abstract

In this paper, we present for the first time a new photonic crystal fiber with a flower-shaped hollow core of six smaller petals arranged in a circular fashion, infiltrated with chloroform. In addition, the air hole's size of the first layer is set to be smaller than that of the others in the cladding. This efficient design dramatically improves the dispersion properties of the fibers. Two near-zero ultra-flat dispersions with small fluctuations are obtained, values of ±0.996 ps/nm.km in the wavelength region of 1439 nm − 1698 nm, and ±1.159 ps/nm.km in the wavelength region of 569 nm − 1861 nm, respectively. These PCFs are new layers of fibers, replacing the previous glass-core fibers, suitable for small-power supercontinuum generation applications.
Keywords: Photonic crystal fibers, Chloroform, Near-zero dispersion, Supercontinuum generation

Tóm tắt

Trong bài báo này, chúng tôi lần đầu tiên đề xuất một cấu trúc sợi  tinh thể quang mới với lõi rỗng hình hoa gồm sáu cánh nhỏ được sắp xếp theo hình tròn và được thấm đầy chloroform. Bên cạnh đó, kích thước các lỗ khí ở lớp thứ nhất của lớp vỏ được thiết kế nhỏ hơn so với các lỗ khí ở những lớp còn lại. Thiết kế hiệu quả này giúp cải thiện đáng kể đặc tính tán sắc của sợi. Hai cấu hình tán sắc siêu phẳng gần bằng không với độ dao động rất nhỏ đã đạt được, lần lượt là ±0,996 ps/nm·km trong dải bước sóng từ 1439 nm đến 1698 nm và ±1,159 ps/nm·km trong dải bước sóng từ 569 nm đến 1861 nm. Các sợi tinh thể  quang tử này đại diện cho một thế hệ cấu trúc sợi mới, thay thế các sợi lõi thủy tinh truyền thống, phù hợp với các nguồn phát siêu liên tục công suất thấp.
Từ khóa: Sợi quang tinh thể, Chloroform, Tán sắc gần bằng không, Phát siêu liên tục

Article Details

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