“Experimental Study to The Effect of Applying Stressing Force on Etched Polarization Maintaining Fiber As Hybrid Fabry-Perot Mach-Zehnder Inline Fiber Interferometer ”. Iraqi Journal of Laser, vol. 20, no. 2, Dec. 2021, pp. 24-31, https://doi.org/10.31900/ijl.v20i2.283.