[Laser] simple laser modulator
[email protected]
[email protected]
Mon, 16 Sep 2002 14:22:52 +0300
Hi all ! Have anyone done or thought modulator like this ? It just came to my mind some day...
(focal point, modulation)
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LASER>� . . . .().......*........()....... (focal point, to transmit optics)
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. () . I . () .
I
I
I
(Piezo or speaker)
Litlle explanation, if you didn't realise yet ;)
Idea is to have needle just at focus point, or some else "beam cutter". If using loudspeaker, you can easily set it to 50% light troughput by biasing ls.
By focusing beam, only litlle movement is needed to obtain 100 % modulation,
so propably high frequency bandwidth might be possible. If using very light (eg. litlle mass) needle, it should also improve bw.
Well, comments, guys !
73, Marko
OH6JSC