Coherent optical communication attracts research interest due to its high detecting sensitivity.However, its application is limited by factors such as practical implementation. This paper presents a new heterodyne detection method that realizes frequency mixing of the sender subcarrier and the receiver subcarrier
to improve detection sensitivity of the wireless laser communication system. The experimental results show that the subcarrier modulation/non-optical heterodyne detection system has nearly 20 dB heterodyne gain and better error rate than direct detection.
KE Xi-zheng, CHEN Jin-ni
. Experimental Investigation on Non-optical Heterodyne Detection Technology of 1 km Atmospheric Laser Communication System[J]. Journal of Applied Sciences, 2014
, 32(4)
: 379
-384
.
DOI: 10.3969/j.issn.0255-8297.2014.04.007
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