Highly Efficient Cladding Pumped Dual-Wavelength Thulium Ytterbium Co-Doped Fiber Laser
A.A. Latiff a, I.M. Babar b, H. Shamsudin a, M.C. Paul c, A. Halder c, S. Das c, S.K. Bhadra c, H. Ahmad a and S.W. Haruna,b
aPhotonics Research Centre, University of Malaya, 50603 Kuala Lumpur, Malaysia
bDepartment of Electrical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia
cFiber Optics and Photonics Division, Central Glass and Ceramic Research Institute, CSIR, Kolkata, India
Received: June 21, 2016; In final form: December 2, 2016
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This paper describes the all-fiber dual-wavelength thulium ytterbium co-doped fiber laser by using a newly developed octagonal shaped double-clad thulium-ytterbium co-doped fiber as gain medium in conjunction with spatial filtering effect. The thulium ytterbium co-doped fiber laser operates at wavelengths of 1990.64 nm and 1998.92 nm with a signal to noise ratio of more than 34 dB as the 980 nm multimode pump power is increased above a threshold value of 1.5 W. The slope efficiency of the dual-wavelength laser is measured to be around 26.16%, which is comparable with the conventional thulium laser pumped by 800 nm single mode pump.

DOI: 10.12693/APhysPolA.130.1332
PACS numbers: 42.55.Wd, 42.60.Fc, 42.70.-a