Coupler of Duality Modulated Radiation and Related Method

Abstract

A generator of duality modulated radiation, of which the irradiance, the wave intensity, or both, are varied from ordinarily equivalent levels, either for purposes of providing energy depleted or energy enriched radiation or for purpose of encoding an information signal. Various techniques are disclosed for restoring irradiance levels to “ordinary” levels, or for amplifying irradiance without affecting wave intensity. A communication system employing duality modulated radiation is also disclosed.

1 . A coupler of duality modulated radiation comprising: 
 first input means, for receiving a first input radiation beam that is duality modulated;    second input means, for receiving a second input radiation beam that is not duality modulated;    transient wave coupling means, for equilibrating irradiance of the first and second radiation beams; and    output means, relative to one of the input beams, producing an output radiation beam that has a similar wave intensity but has a dissimilar equilibrated irradiance.    
   
   
       2 . A coupler as defined in  claim 1 , wherein the first and second input means comprises means for introducing a small angular convergence between the first and second input radiation beams, which results in a similar small angular divergence of first and second output radiation beams.  
   
   
       3 . A coupler as defined in  claim 1 , wherein the transient wave coupling means comprises an amplitude exchange coupler, wherein the duality modulated first input radiation beam and the second input radiation beam are equilibrated and separated into first and second output beams at the respective coupler outputs.  
   
   
       4 . A coupler as described in  claim 1  wherein the transient wave coupling means comprises a directional coupler, wherein the duality modulated first input radiation beam and the second input radiation beam are equilibrated and separated into first and second output beams at the respective coupler outputs.  
   
   
       5 . A coupler as defined in  claim 1 , wherein: 
 the second input radiation beam is polarized relative to the first input radiation beam;    the coupler further comprises means for forming a coincident beam from the first and second input radiation beams;    the coupler further comprises polarizing means disposed in the path of the coincident beam, wherein the polarizing means provides an output radiation beam having a wave intensity derived entirely from one of the input radiation beams and having an irradiance that has been equilibrated by coincident coupling of the first and second input radiation beams.    
   
   
       6 . A method for coupling duality modulated radiation, comprising: 
 receiving at a first input means a first input radiation beam that is duality modulated;    receiving at a second input means a second input radiation beam that is not duality modulated;    in a transient wave coupling means, equilibrating irradiance of the first and second radiation beams; and    producing an output radiation beam that has a similar wave intensity to that of the first input radiation beam but has an irradiance that is restored to the same level as the wave intensity.    
   
   
       7 . A method for amplifying radiation, comprising: 
 generating duality modulated radiation that is enriched in irradiance with respect to wave intensity; and    in a coupler, 
 receiving a first input radiation beam that has a relatively weak irradiance level;  
 receiving a second input radiation beam provided by the step of generating duality modulated radiation;  
 using transient wave coupling means for equilibrating irradiance of the first and second input radiation beams; and  
 producing an output radiation beam that has a similar wave intensity to that of the first input radiation beam but has an irradiance that is enriched with respect to the wave intensity, whereby the irradiance of the first input radiation beam has been amplified.