Measurements of modal birefringence and polarimetric sensitivity of the birefringent holey fiber to hydrostatic pressure and strain

Experimental investigation of the polarization properties of a hollow core photonic bandgap fiber for 1550 nm

“…Their ratio at different wavelengths can further give some insight on the strength of geometrical and stress contributions to the birefringence as was pointed out in [27]. In order to get the wavelength dependence of the phase delay [28][29][30], we measure the relative phase difference as a function of wavelength from the evolution of the output polarization state, and add it to the known absolute phase difference at 1550 nm from the P-OFDR measurements (the sign of the relative phase difference was chosen such that ∂β/∂ω fits best with the corresponding DGD for 1550 nm). The corresponding result (blue curve in Fig.…”

Experimental study of polarization properties of highly birefringent photonic crystal fibers

“…Normally, only the phase or group birefringence is reported, but very seldom both [7,8]. In the presence of strong form birefringence (small-core PCFs), the phase and group birefringence can have very different values [7] and therefore it is important to investigate them both.…”

Design of photonic crystal fiber for Sagnac interferometric pressure sensing with high sensitivity

“…Several pressure sensors based on PM-PCF have been reported. However, since existing PM-PCFs are not specially designed for pressure sensing, they suffer from relatively low sensitivity [4,5]. The authors ever proposed a side-hole PM-PCF to enhance pressure sensitivity [6].…”