Highly birefringent photonic crystal fibers

Abstract

We report a strongly anisotropic photonic crystal fiber. Twofold rotational symmetry was introduced into a single-mode fiber structure by creation of a regular array of airholes of two sizes disposed about a pure-silica core. Based on spectral measurements of the polarization mode beating, we estimate that the fiber has a beat length of approximately 0.4 mm at a wavelength of 1540 nm, in good agreement with the results of modeling.

Supercontinuum generation in a highly birefringent microstructured fiber

“…The main advantage with these fibers is in the preservation of the state of polarization of the field propagating in the fiber. 11 For several applications, it is essential that the output has a well-defined polarization. In addition, the preserved polarization enhances the nonlinear interactions so that less power is required to generate the SC.…”

Symmetry and degeneracy in microstructured optical fibers

“…Indeed, birefringence between the fundamental modes has been observed frequently. 2,[7][8][9] Theoretical discussion of MF birefringence has thus far been based almost entirely on numerical calculations of the modal spectrum, particularly of the pair of essentially uniformly polarized fundamental modes-the analogs in MF of the step-index fiber HEll mode. Some authors (see, e.g., Ref.…”

A dual wavelength distributed-feedback fiber laser

“…24,32 Geometrical alteration of the holes, whether through holes size or size and shape of the solid core, readily creates waveguides of large birefringence. 33,34 As the confinement is controlled by the holes, a percentage of the mode propagates inside the hole. The shape and position of the holes can be used to tailor the stress-optic coefficient of the fibers.…”