XPost: sci.physics, sci.military.naval   
   From: invalid@invalid.com   
      
   On 5/18/2017 10:40 AM, Fred J. McCall wrote:   
   > Serg io  wrote:   
   >   
   >> On 5/18/2017 9:19 AM, Robert Clark wrote:   
   >>> "Fred J. McCall"  wrote in message   
   >>> news:pe8rhc5io10st9eouc05gs6sqkbj1m8j43@4ax.com...   
   >>> ==================================================   
   >>>>   
   >>>> The U.S. Navy is testing ...   
   >>>>   
   >>> That's "has tested", not "is testing".   
      
   >>>> ... a 30 kilowatt laser ...   
   >>>>   
   >>> Like I said, A laser at power levels too low to be deployed.   
   >>>>   
   >>>> ... on the USS Ponce that can take out small boats and small drones.   
   >>>>   
   >>> Very small boats and drones.   
   >>>>   
   >>>> The plan is to install a more powerful 150   
   >>>> kW laser that can take out larger ships and aircraft:   
      
   >>> That's at least three years out.  And any ship that gets one will need   
   >>> at least half a megawatt of spare electrical capacity.  That's quite a   
   >>> stretch, given that big ships like the ARLEIGH BURKE class only have   
   >>> 7.5 MW total and there is already concern whether they can power   
   >>> potential radar upgrades.   
   >>>   
   >>   
   >> the key problem is that large power lasers heat up the airpath and   
   >> defocus themselves.   
   >>   
   >> 10kw or more.   
      
   >   
   > That's already pretty much solved with the 30 kW testing on USS PONCE   
   > and for the 125 kW lasers that are being developed.   
   >   
      
   any idea how they solved it ?  Pulsed can work, but that is low duty   
   cycle...   
      
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