An Interferometric Microwave Comb Generator

Details An Interferometric Microwave Comb Generator An Interferometric Microwave Comb Generator

Mar 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002stt..conf..349k&link_type=abstract

Thirteenth International Symposium on Space Terahertz Technology, held 26-28 March 2002 at Harvard University, Cambridge, MA. O

Computer Science

1

Mach-Zehnder Interferometer, Local Oscillator, Submillimeter

Scientific paper

We have developed a scheme for generating a comb of radio frequencies, covering the microwave to millimeter spectral range. The system utilizes a single diode laser coupled to an optical Mach-Zehnder interferometer and photodetector. Frequency modulating the laser at a rate of 2.154 GHz, we observe an electrical signal from the photodetector with a spectrum that is a comb that extends beyond the 40th harmonic of the fundamental modulation frequency. The line width of the electrical output is less than 2 Hz. We have compared the phase stability of an element of the comb with the output from a classical diode frequency multiplier (both driven from the same source) and have concluded that a phase-stable output can be generated. Finally, we have developed analytical and numerical models that suggest that our scheme may be used for frequency generation through the submillimeter.

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