Инд. авторы:	Lobach I.A., Drobyshev R.V., Fotiadi A.A., Podivilov E.V., Kablukov S.I., Babin S.A.
Заглавие:	Open-cavity fiber laser with distributed feedback based on externally or self-induced dynamic gratings
Библ. ссылка:	Lobach I.A., Drobyshev R.V., Fotiadi A.A., Podivilov E.V., Kablukov S.I., Babin S.A. Open-cavity fiber laser with distributed feedback based on externally or self-induced dynamic gratings // Optics Letters. - 2017. - Vol.42. - Iss. 20. - P.4207-4210. - ISSN 0146-9592. - EISSN 1539-4794.
Внешние системы:	DOI: 10.1364/OL.42.004207; PubMed: 29028049; WoS: 000412916200043;
Реферат:	eng: Dynamic population inversion gratings induced in an active medium by counter-propagating optical fields may have a reverse effect on writing laser radiation via feedback they provide. In this Letter we report, to the best of our knowledge, on the first demonstration of an open-cavity fiber laser in which the distributed feedback is provided by a dynamic grating "written" in a Yb-doped active fiber, either by an external source or self-induced via a weak (similar to 0.1%) reflection from an angle-cleaved fiber end. It has been shown that meters- long dynamic grating is formed with a narrow bandwidth (< 50 MHz) and a relatively high-reflection coefficient (> 7%) securing single-frequency operation, but the subsequent hole-burning effects accompanied by new grating formation lead to the switching from one longitudinal mode to another. providing a regular pulse-mode dynamics. As a result, periodically generated pulse trains cover a spectrum range of several terahertz delivering millions of cavity modes in sequent pulses. (c) 2017 Optical Society of America
Издано:	2017
Физ. характеристика:	с.4207-4210