Computer Science
Scientific paper
Jun 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.2120..237k&link_type=abstract
Proc. SPIE Vol. 2120, p. 237-245, Laser Beam Propagation and Control, Hugo Weichel; Lewis F. DeSandre; Eds.
Computer Science
Scientific paper
The feasibility of phase telescope arrays for coherent optical space communications is demonstrated by a proof-of-concept laboratory experiment. The incident optical power is collected by four subtelescopes and coherently combined into a single monomode output fiber. The implemented optical receive array antenna is self-phasing, i.e., the optical subfield pistons are automatically adapted with respect to the direction of the incident wavefront. The telescope array is completely independent of any subsequent receiver and of the data modulation format employed. Our experimental setup operates at a wavelength of 1064 nm. With an optical input power of 1 nW per subaperture, the system efficiently combines the optical input subwaves and responds to a step-shaped change of the input wavefront direction within 1 ms.
Kudielka Klaus H.
Leeb Walter R.
Neubert Wolfgang M.
Scholtz Arpad L.
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