Title :
Relative intensity noise in cascaded-Raman fiber lasers
Author :
Babin, S.A. ; Churkin, D.V. ; Fotiadi, A.A. ; Kablukov, S.I. ; Medvedkov, O.I. ; Podivilov, E.V.
Author_Institution :
Inst. of Autom. & Electrometry, Russian Acad. of Sci., Novosibirsk, Russia
Abstract :
Pump-to-Stokes and Stokes-to-Stokes relative intensity noise (RIN) transfer is discovered now for cascaded Raman fiber lasers (RFLs) with multimode laser pumping. We report on the first experimental study of this effect observed with two-stage phosphosilicate RFL and also propose its analytical explanation. It is shown that the peaks of radio-frequency (RF) spectrum associated with longitudinal mode beating in the pump laser cavity almost uniformly transfer to the first and second Stokes RF-spectra, thus increasing RIN of the RFL in megahertz-frequency domain.
Keywords :
Raman lasers; fibre lasers; laser cavity resonators; laser modes; laser noise; optical pumping; phosphosilicate glasses; radiofrequency spectra; P2O5SiO2; Raman lasers; Stokes RF-spectra; Stokes-to-Stokes RIN transfer; cascaded fiber lasers; longitudinal mode beating; multimode laser pumping; pump laser cavity; pump-to-Stokes RIN transfer; radiofrequency spectrum; relative intensity noise; two-stage phosphosilicate RFL; Fiber lasers; Laser excitation; Laser modes; Laser noise; Optical fiber communication; Power generation; Pump lasers; Quantum cascade lasers; Radio frequency; Stimulated emission; Raman fiber laser (RFL); relative intensity noise (RIN);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.859547
