Two-Mode photonic crystal fibers and applications thereof
A two-mode photonic crystal fiber includes a core of a substantially transparent core material. The core material has a core refractive index and a length, and has a core diameter. The fiber also includes a cladding region surrounding the length of core material. The cladding region has a first substantially transparent cladding material, having a first refractive index. The first substantially transparent cladding material has embedded along its length a substantially periodic array of holes, having a diameter, d, and being spaced apart by a pitch, .LAMBDA.. The holes have a second refractive index, which is less than the first refractive index. The dimensions of the hole diameter, d, and the pitch, .LAMBDA., co-operate to give two modes propagation within the photonic crystal fiber independent of input radiation wavelength for any value of the pitch, .LAMBDA., for a substantially fixed d/.LAMBDA. ratio within a range of approximately 0.45 0.65.
Inventor: Jin, Wei | Ju, Jian | Wang, Zhi
Priority Number: US7190869B2
IPC Current: G02B000632
US Class: 385125
Assignee Applicant: The Hong Kong Polytechnic University
Title: Two-mode photonic crystal fiber and applications thereof
Usefulness: Two-mode photonic crystal fiber and applications thereof
Summary: Used in interferometric sensor, optic frequency shifter, optic wavelength filter, optic wavelength tunable switch (claimed), mode converter, mode selective coupler, and add-drop multiplexer.
Novelty: Photonic crystal fiber for e.g. interferometric sensor, has cladding region surrounding length of core material, where region includes transparent cladding material with refractive index
光學
光纖
JIN Wei
JU Jian
WANG Zhi
美國
