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

Ivan Panyaev; Pavel Itrin; Dmitry Korobko; Dmitrij Sementsov; Ivan Chapalo; Patrice Mégret; Andrei A. Fotiadi

doi:10.1117/12.2665903

31 May 2023 Stabilizing DFB laser injection-locked to an external polarization maintaining optical fiber ring cavity

Ivan Panyaev, Pavel Itrin, Dmitry Korobko, Dmitrij Sementsov, Ivan Chapalo, Patrice Mégret, Andrei A. Fotiadi

Proceedings Volume 12572, Optical Sensors 2023; 125721K (2023) https://doi.org/10.1117/12.2665903
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic

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Abstract

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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Ivan Panyaev, Pavel Itrin, Dmitry Korobko, Dmitrij Sementsov, Ivan Chapalo, Patrice Mégret, and Andrei A. Fotiadi "Stabilizing DFB laser injection-locked to an external polarization maintaining optical fiber ring cavity", Proc. SPIE 12572, Optical Sensors 2023, 125721K (31 May 2023); https://doi.org/10.1117/12.2665903

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