Single-polarization single-mode photonic crystal fiber based on index-matching coupling with a single silica material
- Single-polarization single-mode photonic crystal fiber based on index-matching coupling with a single silica material
- 이성구; 임선도; 이관일; 이상배
- Photonic crystal fiber; Single-polarization single-mode; Index-matching coupling
- Issue Date
- Optical fiber technology
- VOL 17, NO 1, 36-40
- We propose and analyze a novel design of single-polarization single-mode photonic crystal fiber based on
index-matching coupling by using a finite-element method. The proposed fiber is designed such that
there is a large differential loss between two polarizations of the fundamental mode by reducing two
air holes in the cladding region which is composed of hexagonal structured air holes in pure silica. From
the numerical analysis it is shown that single-polarization single-mode operation wavelength region can
be tuned by adjusting the diameters of two defect air holes. In the proposed design, the spectral region
over which the differential loss ratio is larger than 100 can be wider than 150 nm around the wavelength
1.55 or 1.31 μm. Another novel design that allows simultaneous single-polarization single-mode
guidance in two wavelength windows centered at 1.55 and 1.31 μm is also proposed.
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