Characterization of regenerative stabilized actively mode-locked fiber laser incorporating a saturated amplifier in feed-back chain. (April 2015)

• Record Type: Journal Article
• Authors: Bekal, Anish; Vijayan, Kovendhan; Srinivasan, Balaji
• Is Part Of: Optics & laser technology. Volume 67(2015)
• Page Start: 98
• Page End: 106
• Publication Date: 2015-04
• Subjects: Regenerative stabilization -- Actively mode-locked fiber laser -- Noise performance; Optics -- Periodicals; Lasers -- Periodicals; Electronic journals; 621.366
• DOI: 10.1016/j.optlastec.2014.10.005
• Languages: English
• ISSNs: 0030-3992

Abstract

Abstract: An actively mode-locked fiber laser with regenerative stabilization established through a feed-back electronic amplifier operated in the saturation regime is reported in this paper. Compared to the regenerative stabilization schemes that employ phase-locked loops (PLL), a saturated amplifier has been used for inhibiting the transmission of amplitude noise through the feed-back chain. Such a laser system has been constructed, studied and characterized as a function of its design variables. Specifically, the electronic phase shift in the feed-back circuit and the RF power applied to the modulator have been varied to study their effect on the mode-locked pulse train. The influence of these parameters on super-mode noise is studied and the optimum values of phase shift and RF power of the recovered carrier at which the noise is found to be a minimum (−48 dB) has been determined. A comparison of systems with and without regenerative mode-locking under controlled conditions reveals that a regenerative system has at-least an order of magnitude better noise performance compared to a system without regeneration. Abstract : Highlights: Regenerative stabilization scheme incorporating saturated amplifier in feedback chain. Pulse width, energy jitter and the super-mode noise respect to detuning parameters. Comparison between systems with and without regeneration in the presence of forced vibrations.