Sub-Doppler Spectroscopy With a CMOS Transmitter

Deacon J. Nemchick*, Brian J. Drouin, Adrian J. Tang, Yanghyo Kim, Mau-Chung Chang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


A compact and low-power complementary metal oxide semiconductor (CMOS)-based transmitter with an operational bandwidth of 90-105 GHz has been deployed as the radiation source in a high-resolution sub-Doppler (Lamb-dip) absorption spectrometer. The source output can be both frequency and amplitude modulated allowing for the application of highly sensitive detection schemes commonly used in molecular spectroscopy. The CMOS transmitter has been shown to have sufficient output power to perform spectral hole burning saturation experiments and a phase-noise floor low enough to determine spectral line positions with a precision of 1 part in 109 to accuracy within the error of measurements made with traditional millimeter-wave sources.

Original languageEnglish
Article number8234619
Pages (from-to)121-126
Number of pages6
JournalIEEE Transactions on Terahertz Science and Technology
Issue number1
StatePublished - 1 Jan 2018


  • Carbonyl sulfide (OCS)
  • complementary metal oxide semiconductor (CMOS)-TRX
  • Lamb-dip
  • spectroscopy
  • sub-Doppler


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