Heterodyne detection of Arcturus at 10.6 $mu$m

Journal Article · Mon Oct 01 04:00:00 EDT 1973 · Nature (London) Phys. Sci., v. 245, no. 145, pp. 89-90

OSTI ID:4373959

Batz, B D; Granes, P; Gay, J; Journet, A

It is stated that heterodyne detection of Arcturus was achieved at l0.6 mu m in April 1973 during observation at St. Michel Observatory, France. The experimental arrangement is described, and was based on the superimposition of coherent and incoherent beams achieved using a servomechanism working at 2.2 mu m. The local oscillator was a C0/sub 2/ laser working at 10.6 %mmm, and the detector was of the HgCdTe photovoltaic type. It is thought that atmospheric turbulence was responsible for some mismatching of the star and laser beams, causing a loss in the heterodyne signal, and this will be a handicap in future exploitation of the method; the work described, however, is a first step in the direction of heterodyne aperture synthesis in the infrared. (UK)

• Research Organization: Observatoire de Paris, Meudon, France
• NSA Number: NSA-29-013416
• OSTI ID: 4373959
• Journal Information: Nature (London) Phys. Sci., v. 245, no. 145, pp. 89-90, Journal Name: Nature (London) Phys. Sci., v. 245, no. 145, pp. 89-90; ISSN NPSCA
• Country of Publication: United Kingdom
• Language: English

Related Subjects

*STARS-- INFRARED RADIATION
APERTURES
DISPLAY DEVICES
LASER RADIATION
N56200* --Physics (Astrophysics & Cosmology)--Stars
PLOTTERS
SERVOMECHANISMS
TELESCOPES