We report on linewidth narrowing and stabilization of semiconductor DFB laser implemented through its self-injection locking to an external fiber ring cavity in conjunction with an active optoelectronic feedback circuit controlled by a simple low-cost USB-DAQ card. The system enables narrowing of the DFB laser linewidth below ~0.5 kHz and drastically reduced the laser phase noise. Specifically, the laser configuration is fully spliced from the polarization maintaining (PM) single-mode optical fiber that exhibits significantly improved stability against the environment noise. Drastic narrowing of the DFB laser linewidth down to ~310 Hz and a phase noise less than –100 dBc/Hz (<30 kHz) are achieved with the PM fiber ring cavity built from a single fiber coupler. The reported PM laser configuration is of great interest for many laser applications where a narrow sub-kHz linewidth, simple design and low cost are important.


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    Titel :

    Stabilizing DFB laser injection-locked to an external polarization maintaining optical fiber ring cavity


    Beteiligte:
    Baldini, Francesco (Herausgeber:in) / Homola, Jiri (Herausgeber:in) / Lieberman, Robert A. (Herausgeber:in) / Panyaev, Ivan (Autor:in) / Itrin, Pavel (Autor:in) / Korobko, Dmitry (Autor:in) / Sementsov, Dmitrij (Autor:in) / Chapalo, Ivan (Autor:in) / Mégret, Patrice (Autor:in) / Fotiadi, Andrei A. (Autor:in)

    Kongress:

    Optical Sensors 2023 ; 2023 ; Prague, Czech Republic


    Erschienen in:

    Proc. SPIE ; 12572


    Erscheinungsdatum :

    2023-05-31





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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