Joe Rongen
Oct12-06, 04:04 AM
"Jonathan Thornburg -- remove -animal to reply" <jthorn@aei.mpg-zebra.de>
wrote in message news:3n0pqpF191pidU1@individual.net...
[snip]
> I suggest a Pockels cell for the modulator -- they can work on 100-300
> volts and can respond in nanoseconds. When I did this experiment
> (final undergraduate year physica lab, c. 1981) I used around 15MHz
> modulation, which gave a long-arm-length-difference of about 10 meters.
For a less expensive experiment; most cheap laser pointers can be power
modulated up to an amazing 10 MHz (or better) with a simple circuit
operating at 5 Volts DC. A complete circuit for the electronics
appeared in the magazine "Nuts & Volts" in the beginning of 2005.
wrote in message news:3n0pqpF191pidU1@individual.net...
[snip]
> I suggest a Pockels cell for the modulator -- they can work on 100-300
> volts and can respond in nanoseconds. When I did this experiment
> (final undergraduate year physica lab, c. 1981) I used around 15MHz
> modulation, which gave a long-arm-length-difference of about 10 meters.
For a less expensive experiment; most cheap laser pointers can be power
modulated up to an amazing 10 MHz (or better) with a simple circuit
operating at 5 Volts DC. A complete circuit for the electronics
appeared in the magazine "Nuts & Volts" in the beginning of 2005.