FIrpic thin film as saturable absorber for passively Q-switched and mode-locked erbium-doped fiber laser
Document Type
Article
Publication Date
1-1-2019
Abstract
In this paper, we demonstrate the generation of passive all-fiber Q-switched and mode locked erbium doped fiber lasers (EDFLs) by using Bis[2-(4,6-difluorophenyl)pyridinato-C2,N](picolinato) iridium(III) (FIrpic) as a saturable absorber (SA). The material was prepared by solvent-casting technique and inserted between two fiber ferrules to form an SA. Then it was placed in an EDFL cavity. A stable Q-switched pulse laser operating at 1560.4 nm was achieved at a threshold pump power of 30 mW. The pulse repetition rate increased from 39.22 to 87.4 kHz and the pulse width decreased from 9.5 to 3.4 µs as the pump power was gradually increased from 30 to 208 mW. Meanwhile, a soliton self-starting mode-locking pulses at a wavelength of 1562.57 nm was achieved by adding an additional 52 m SMF to the EDFL cavity. The mode-locked laser had a repetition rate of 3.43 MHz and a pulse width of 120 ns within the pump power of 35–185 mW. The results suggest that FIrpic SA can be used to produce stable Q-switched and mode-locked fiber lasers at a low pump power. © 2019 Elsevier Inc.
Keywords
Flrpic organic material, Passive saturable absorber, Q-switching, Mode-locking
Divisions
fac_eng,PHYSICS
Funders
Imam Ja'far Al-Sadiq University , Baghdad, Iraq and Al-Madinah International University (MEDIU), Malaysia, under grant No.: RMC-MEDIU003/E/2018,National Key R&D Program of China ( 2016YFE0126500 ),National Natural Science Foundation of China (NSFC) ( 61575050 ),Key Program for Natural Science Foundation of Heilongjiang Province of China ( ZD2016012 ),Open Fund of the State Key Laboratory on Integrated Optoelectronics ( IOSKL2016KF03 ), 111 project (B13015)
Publication Title
Optical Fiber Technology
Volume
50
Publisher
Elsevier