Design of Wideband Single-Polarization Single-Mode Photonic Crystal Fiber

Single-polarization single-mode photonic crystal fiber based on index-matching coupling with a single silica material

“…In fact, there exist other loss mechanisms such as Rayleigh scattering, material absorption, geometrical imperfection and so on. However, previous studies indicate that the confinement loss simulations provide valuable information for designing SPSM-PCFs [15,16,19,20]. Calculated confinement loss of the proposed fiber when d 3 /K = 0.283 is plotted in Fig.…”

“…Even though birefringence is strongly improved, however, polarization maintaining ability of HB-PCFs is still influenced by polarization cross talk or polarization mode dispersion. Recently, there have been a number of attempts to realize single-polarization single-mode (SPSM) operation in PCFs [14][15][16][17][18][19][20][21][22]. Since SPSM fibers guide only one polarization state of the fundamental modes and suppress the other orthogonal polarization state, SPSM fibers are free from polarization mode coupling and polarization mode dispersion.…”

Ultra-wideband single-polarization single-mode, high nonlinearity photonic crystal fiber

“…Many of these designs are focused on SPSMs with large mode effective areas that are useful in high-power systems [7,8]. On the other hand, novel optical fiber communication applications, such as parametric amplification, wavelength conversion and wavelength multicasting make use of fiber nonlinearity and prefer low-loss nonlinear SPSM fibers [9]. Nonlinear SPSM fibers could eliminate polarization-dependent noises and enhance interaction efficiency by aligning the polarization of the interacting waves in the same direction.…”

An asymmetric dual-core single-polarization single-mode photonic crystal fiber coupler

“…Based on different air-hole diameters along the two orthogonal axes, PCFs with high modal birefringence can be easily achieved, because the index contrast is higher than that in conventional fibers. Recently, it has been shown that highly birefringent PCFs have the potential ability to realize wide-band singlepolarization single-mode (SPSM) fibers [2][3][4] . S-Q.…”

“…Lou et al [2] have designed an ultra-broadband SPSM PCF with a wavelength range from 1.46 m to 2.04 m, nearly 580 nm in width. F. Zhang et al [3] have proposed a rectangular-lattice PCF which has a wide-band SPSM range and confinement loss less than 0.1 dB/km within the wavelength from 1.20 m to 1.66 m. The SPSM PCF coupler was first designed by Y. Yang et al [5] which had a SPSM coupling range more than 200 nm wide. Due to the inherent flexibility in designing the array of air holes in a PCF structure, the directional couplers based on triple-core index-guiding PCFs have been extensively investigated [6,7] .…”