A Laser Transceiver for the ARRL 10-GHz-and-Up Contest
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چکیده
This paper describes the construction of a laser transceiver designed specifically for the ARRL 10-GHz-and-Up contest. Earlier versions of this transceiver were presented in Microwave Update Proceedings for 1998 through 2000. This version has been greatly simplified. The previous amplifier incorporated automatic gain control to prevent saturation, which was found unnecessary. Also, the detector-bias dc-dc converter has been eliminated; the detector is now biased from the negative battery supply. The result is a simplified transceiver with improved performance because of noise reduction from the above changes. The transceiver is becoming popular as an entry into laser experimentation. The beginner can build this transceiver and then use the electronics with a larger telescope for DX, perhaps graduating to a higher-power laser diode for even greater range. A PC board is now available from FAR Circuits that lets experimenters easily duplicate the transceiver.
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