Optical Frequency Shifter Employing a Brillouin-Assisted Filtering Technique

Hao Chen, Erwin H.W. Chan

    Research output: Contribution to journalArticlepeer-review


    A new optical frequency shifter is presented. It is based on a double sideband suppressed carrier radio-frequency (RF) modulated optical signal into a Brillouin-assisted filter, which is formed by a Brillouin medium between a pair of optical circulators. The frequency shifting operation is realized by utilizing multiple stimulated Brillouin scattering gain and loss spectra to amplify one of the third-order sidebands but attenuate the other sidebands. The frequency shifter has a simple structure and a high frequency shifted to unwanted frequency component ratio. It also has the ability to realize a very large frequency shift, which is three times the input electrical driving signal frequency. The frequency shifter is experimentally demonstrated with the results showing a 32.53 GHz optical frequency shift of a continuous wave light at 1551.016 nm with over 34 dB difference between the wanted frequency shifted and unwanted frequency components.

    Original languageEnglish
    Article number16795179
    Pages (from-to)1-11
    Number of pages11
    JournalIEEE Photonics Journal
    Issue number2
    Publication statusPublished - Apr 2017


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