[Laser] Laser comm and ARRL?

Fri, 20 Feb 2004 17:47:16 -0800

At 06:03 PM 2/20/04 -0500, [email protected] wrote:
>In a message dated 2/19/04 5:20:20 AM GMT Standard Time, [email protected] 
>writes:
>
>> I find the "coherent" requirement particularly amusing as I suspect that 
>> beam from a typical semiconductor or HeNe laser isn't even coherent a kilometer 
>> away. It's still exceptionally well collimated at that distance, but not 
>> coherent! How is a well collimated LED (which is also very monochromatic) all 
>> that different?
>> 
>> 73 de Glenn WB6W
>> 
>> 
>
>This seems to imply that there is a connection between COHERENT light and 
>BEAMWIDTH.  There isn't.

<snip> Yup - that was my point. ;-) de wb6w

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