Subject: how can we calculate the optical confinement factor of a laser diode?

I found a table that contains the optical confinement factors of quantum well 
laser diode corresponding to different active layer thicknesses. But that is 
perticularly for GaAs/Al(0.3)Ga(0.7)As structure. How can we calculate the 
confinement factor for the structure other than this. I want to know some 
mathematical relation between the optical confinement factor and the active 
layer thickness. That should also taking in to account the refractive indices 
of active layer and cladding layers. 

Re: how can we calculate the optical confinement factor of a laser diode?