Four prism interferometer superposes local oscillator beam on signal beam. Position of movable prism directs incident energy in both beams out one output port. Output port is spatially separated from input ports, and there is no limitation on size of frequency difference between laser beams.
Diplexer for laser-beam heterodyne receiver
NASA Tech Briefs ; 5 , 3
1981-01-01
Miscellaneous
No indication
English
NTRS | 1977
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IEEE | 2005
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