Yb,Er:glass Microlaser at 1.5 µm for optical fiber sensing: development, characterization and noise reduction

Alexey Pniov, Andrey Zhirnov, Dmitriy Shelestov, Konstantin Stepanov, Evgeny Nesterov, Valery Karasik, Paolo Laporta, Gianluca Galzerano, Stefano Taccheo, Luigi Piroddi, Michele Norgia, Alessandro Pesatori, Cesare Svelto


A fiber-pumped single-frequency microchip erbium laser was developed and characterized with the aim of using it in coherent Optical Time Domain Reflectometry (OTDR) measurements and sensing. The laser is pumped by a fiber-coupled 976 nm laser diode and provides 8 mW TEM00 single frequency output power at 1.54 µm wavelength, suitable for efficient coupling to optical fibers. The amplitude and phase noise of this 200 THz oscillator were experimentally investigated and a Relative Intensity Noise (RIN) control loop was developed providing 27 dB RIN peak reduction at the relaxation oscillation frequency of 800 kHz

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DOI: http://dx.doi.org/10.21014/acta_imeko.v5i4.423