Are you trying to convert the wavelengths of light into lower frequency microwaves that directly represent the wavelengths of light?

What is the application (spread spectrum step-down frequency converter or similar perhaps)?

its actually for wireless electric transfer

Have you tried a google search of "wireless electric transfer" for plenty of general information and designs?

http://en.wikipedia.org/wiki/Wireless_energy_transfer

http://en.wikipedia.org/wiki/Microwave_power_transmission

Can you provide more specific information on your application please as this topic is very broad.

hi: you can convert soler Energy to electric by photocell to convert it to Microwaves

you talking as communication system and light or elect to wave (laser)

if you send more details to me may i can help you

Eng waleed Zoud

waleed23jo@yahoo.com