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Poincare sphere and Degree of polarization 
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#1
Jul2609, 08:53 PM

P: 7

Hi,
Can someone explain the concept of "Poincare sphere"? What's the relationship between the Poincare Sphere and the Degree of polarization of EM fields? Thanks Madara 


#2
Jul2709, 07:20 AM

Sci Advisor
P: 5,508

The Poicare sphere is a way of describing the 4component Stokes vector:
http://en.wikipedia.org/wiki/Polarization (about 1/2way down) The state of polarization is represented by a point on the sphere. Note: for fully polarized light, S_0 = 1 and the point lies on the surface of the sphere; partially polarized light has S_0<1 and so the point lies within the sphere. Going from the Stokes formulation to the Jones formulation can be a little tricky: http://en.wikipedia.org/wiki/Stokes_vector Since the Stokes/Mueller forumlation is inherently statistical in nature, while the Jones matrices only hold for completely polarized light. Does that help? 


#3
Jul2809, 01:53 AM

P: 7

Thanks Andy. I will refer the wikipedia for more info.



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