Heterodyne detection of Arcturus at 10.6 $mu$m
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, Other Information: Orig. Receipt Date: 30-JUN-74; Bib. Info. Source: UK (United Kingdom (sent to DOE from))
- Country of Publication:
- United Kingdom
- Language:
- English
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