Tunable terahertz signals using a helicoidally polarized ceramic microchip laser

Aaron McKay*, Judith M. Dawes

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)
19 Downloads (Pure)


A two-frequency microchip laser based on highly doped ceramic Nd:YAG and twisted polarization modes is presented. The frequency difference between modes was tunable continuously over a frequency range of 150 GHz, from radio frequency to terahertz frequencies. This tuning is limited by the gain bandwidth of the Neodymium-doped YAG laser medium. The long-term frequency stability of the resulting narrow-linewidth beat-note signal is very good. This offers a simple, yet widely tunable terahertz source with potential for portable frequency reference applications.

Original languageEnglish
Pages (from-to)480-482
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number7
Publication statusPublished - 1 Apr 2009

Bibliographical note

Copyright 2009 IEEE. Reprinted from IEEE photonics technology letters, Volume 21, Issue 7, 480-482. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Macquarie University’s products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.


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