Document Type
Article (Restricted)
Publication Date
3-1-2015
Abstract
We demonstrate a Q-switched fibre laser operating at 1949.0 nm, which is based on a nonlinear polarization rotation (NPR) technique. It uses a 2 m long commercial thulium-doped fibre and a 15 m long homemade thulium-ytterbium co-doped fibre as active media. They are pumped respectively by 800 nm single-mode and 905 nm multimode radiations. A stable Q-switched pulse train with the repetition rate 13.49 kHz and the pulse width 3.089 mu s is obtained when the 905 nm and 800 nm pump powers are fixed at 2.3 W and 110.4 mW, respectively. The maximum pulse energy, 11 nJ, is obtained at the 800 nm and 905 nm pump powers equal respectively to 110.4 mW and 2.5 W. To the best of our knowledge, this is the first reported Q-switched fibre laser using the NPR technique.
Keywords
2 mu m Q-switched fibre lasers, Thulium-ytterbium co-doped fibres, Nonlinear polarization rotation, Saturable Absorber
Divisions
fac_eng
Funders
Malaysian Ministry of Higher Education under ERGS ER012-2012A ,University of Malaya PG068-2013B,Department of Science and Technology (DST) - New Delhi, India
Publication Title
Ukrainian Journal of Physical Optics
Volume
16
Issue
1
Publisher
Institute of Physical Optics
Additional Information
ISI Document Delivery No.: CC8JH Times Cited: 0 Cited Reference Count: 12 Cited References: Anyi CL, 2013, UKR J PHYS OPT, V14, P212 Baudelet M, 2010, OPT EXPRESS, V18, P7905, DOI 10.1364/OE.18.007905 El-Sherif AF, 2003, OPT COMMUN, V218, P337, DOI 10.1016/S0030-4018(03)01200-8 Hamzah A, 2013, OPT LASER TECHNOL, V47, P22, DOI 10.1016/j.optlastec.2012.08.014 Harun SW, 2012, CHINESE PHYS LETT, V29, DOI 10.1088/0256-307X/29/11/114202 Herda R, 2008, OPT LETT, V33, P1011, DOI 10.1364/OL.33.001011 Kivisto S, 2008, OPT EXPRESS, V16, P22058, DOI 10.1364/OE.16.022058 Lu BL, 2013, LASER PHYS, V23, DOI 10.1088/1054-660X/23/4/045111 Qamar FZ, 2005, OPT COMMUN, V248, P501, DOI 10.1016/j.optcom.2004.12.032 Tang YL, 2008, OPT COMMUN, V281, P5588, DOI 10.1016/j.optcom.2008.07.069 Theisen-Kunde D, 2007, P SOC PHOTO-OPT INS, V6632, P63205, DOI 10.1117/12.727861 Wang Q, 2012, OPT LETT, V37, P395, DOI 10.1364/OL.37.000395 Azooz, S. M. Harun, S. W. Ahmad, H. Halder, A. Paul, M. C. Das, S. Bhadra, S. K. Malaysian Ministry of Higher Education under ERGS ER012-2012A; University of Malaya PG068-2013B; Department of Science and Technology (DST) - New Delhi, India This study is funded by the Malaysian Ministry of Higher Education under ERGS (Grant No. ER012-2012A), University of Malaya (Grant No. PG068-2013B), and the Department of Science and Technology (DST) - New Delhi, India. 0 INST PHYSICAL OPTICS LVIV UKR J PHYS OPT