What is Birefringence?
        
	  
	
    Q.  With respect to single mode and graded index fibers, which parameter specifies the propagation of polarization modes with different phase velocities & the difference between their effective refractive indices?- Published on 21 Nov 15a. Mode field diameter
b. Birefringence
c. Fiber beat length
d. Spot Size
ANSWER: Birefringence