Circular polarization emission from an external cavity diode laser

Fan Zhang, Jian Xu, Akhlesh Lakhtakia, Ting Zhu, Sean M. Pursel, Mark W. Horn

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


An external cavity diode laser (ECDL) containing a chiral sculptured-thin-film (STF) mirror for very pure circularly polarized (CP) emission was fabricated and its single-mode, left-handed CP lasing performance was observed. The extinction ratio of the CP output was found to increase rapidly near the threshold of the injection current for the laser diode. The Jones-matrix representation of a chiral STF mirror was used to calculate the eigenstates in the external cavity of the ECDL with the transfer matrix method, the results suggesting that the only resonant mode in the external cavity of the laser is CP with the same handedness as the structural handedness of the chiral STF mirror.

Original languageEnglish (US)
Article number111109
JournalApplied Physics Letters
Issue number11
StatePublished - 2008

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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