Alas. For me, this raises more questions than answers. MOPA is used here in a different way than I have been used to in lasers. I don't quite understand the attempt to mix audio frequency (20 to 20k Hz) with radio frequency (3.30-3.8 MHz, just below radar). I'm not a radio guy, so I don't have a clear idea what the sideband frequencies would be. And then, is he amplitude modulating the light with this frequency?
This is why I never was interested in becoming an electrical engineer! I would be hesitant, however, to spray that much power at any patient.
Alas. For me, this raises more questions than answers. MOPA is used here in a different way than I have been used to in lasers. I don't quite understand the attempt to mix audio frequency (20 to 20k Hz) with radio frequency (3.30-3.8 MHz, just below radar). I'm not a radio guy, so I don't have a clear idea what the sideband frequencies would be. And then, is he amplitude modulating the light with this frequency?
This is why I never was interested in becoming an electrical engineer! I would be hesitant, however, to spray that much power at any patient.