Single-frequency synthesis at telecommunication wavelengths

V. Ahtee, M. Merimaa, K. Nyholm

    Research output: Contribution to journalArticleScientificpeer-review

    13 Citations (Scopus)


    We report an optical single-frequency synthesizer at the 1.55 μm telecommunications band. Output from a continuous-wave external cavity diode laser is frequency doubled and phase locked to a predetermined component of a Ti:S laser frequency comb. The synthesizer is capable of generating a single user-specified frequency from an atomic time base within the 192-196 THz gain bandwidth of an erbium-doped fiber amplifier. By tuning the repetition rate of the femtosecond laser the synthesized optical frequency can be swept with sub-kilohertz step size. Frequency sweeps of several GHz are realized by automatically re-locking the diode laser to adjacent comb components during frequency sweep. We demonstrate the operation of the device by presenting results of Doppler-free spectroscopy on acetylene using synthesized frequencies.

    Original languageEnglish
    Pages (from-to)4890-4896
    Number of pages7
    JournalOptics Express
    Issue number6
    Publication statusPublished - 16 Mar 2009
    MoE publication typeA1 Journal article-refereed


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