Physics
Scientific paper
Mar 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002stt..conf..221h&link_type=abstract
Thirteenth International Symposium on Space Terahertz Technology, held 26-28 March 2002 at Harvard University, Cambridge, MA. O
Physics
Scientific paper
We report on the generation of radiation at frequencies from 70 GHz to above 600 GHz by photomixing in commercially available 70 GHz bandwidth photodiodes. The mm-wave and sub-mm-wave power was generated in W-band waveguide mounts by the beating of two 1.55 μm laser beams. Maximum optical to mm-wave power conversion efficiencies above 1 % were measured at frequencies between 75 GHz and 110 GHz, where an input power of +10 dBm yielded a non-saturated output power above -10 dBm. Measured output powers fell approximately as (frequency)-4 above 140 GHz, so that a power of approximately -40 dBm was detected at 625 GHz. We remark that the waveguide mount is non-optimised for frequencies above 110 GHz, and so these measurements represent a lower limit on the generated power.
Davies Paul A.
Ellison Brian N.
Gomes Nathan J.
Huggard Peter G.
Payne Matthew J.
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