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

Abstract


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