| Optoelectronic terahertz sources based on photomixers (2004) | |||||||||
Abstract | |||||||||
| OptoelectronicTerahertz Sources Based Photomixers Pin Chen Peter Siegel Herbert Pickett John Pearson RolfA Wyss currently cQuint Communications Andrea Net currently TNO Netherlands Jet Propulsion Laboratory California Institute Technology Pasadena USA Melissa Kelly Geoffrey Blake Division Chemistry ChemicalEngineering California Institute Technology Pasadena USA Arthur Gossard Materials Department University California Santa Barbara USA ABSTRACT Molecular line observationin the THzregion using heterodyne receivers powerful way investigate the chemistry and physicsof the interstellarmedium However THzheterodyne observation potentialis far from being fullyrealized due source technologylimitations The available solid state sources with enough power serveas local oscillators LOs above THz arecurrentlylimitedto bandwidth and THz maximum frequency Additionally the lack high spectralpurity frequency agile sources hinders laboratoryspectroscopy andreceiver component characterization are developing traveling wavephotomixers and laser systemsto overcome these impedunents Our goals include providing space borne technology for HEB mixers over THzandportable automated signal sourcesfor characterizationof THzreceiverskomponents well laboratoryspectroscopy The stateof research will presented along with discussionsof requirements for THzLOs and laboratorytest sources and the photomixer approach unique advantages THZ LOCAL OSCILLATORFOR HEB MIXERS SPACE BORNE PLATFORMS Introduction the four m | |||||||||
Details der Publikation | |||||||||
| |||||||||