Dual-wavelength passively Q-switched erbium ytterbium codoped fiber laser based on a nonlinear polarization rotation technique
Document Type
Article
Publication Date
3-1-2015
Abstract
We report a room temperature all-fiber dual-wavelength Erbium Ytterbium codoped fiber laser (EYDFL) operating at 1543.3 and 1545.4 nm using a nonlinear polarization rotation (NPR) technique. An isolator is used in conjunction with a multilobed double-clad Erbium Ytterbium codoped fiber to induce intensity-dependent loss in a sufficiently high loss ring cavity to achieve dual-wavelength and Q-switching simultaneous operations. At the threshold pump power of 0.27 W, the EYDFL generates a sequence of pulses with repetition rate of 12.06 kHz and pulse width of 11.56 mu s. When the multimode pump is increased to 0.60 W, the repetition rate can be tuned to 57.94 kHz. The lowest pulse width of 5.04 mu s and the maximum pulse energy of 72.01 nJ are obtained at the pump power of 0.55 W. The simple and inexpensive dual-wavelength Q-switched NPR-based laser has a big potential for applications in metrology, environmental sensing, and biomedical diagnostics. (C) 2015 Wiley Periodicals, Inc.
Keywords
Fiber lasers, dual-wavelength laser, q-switched laser, erbium ytterbium codoped fiber laser, saturable absorber, generation, photonics, soliton
Divisions
fac_eng
Funders
Ministry of Education and University of Malaya PG139-2012B PG068-2013B RP008C-13AET RU002/2013
Publication Title
Microwave and Optical Technology Letters
Volume
57
Issue
3
Publisher
WILEY-BLACKWELL, 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
Additional Information
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