| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Dual-Wavelength Holmium-Doped Fiber Laser Pumped by Thulium–Ytterbium Co-Doped Fiber Laser |
| A. A. Latiff1,2, A. Dhar3**, S. W. Harun1,4**, I. M. Babar4, S. Das3, M. C. Paul3, H. Ahmad1 |
1Photonics Research Center, University of Malaya, Kuala Lumpur 50603, Malaysia
2Faculty of Electronics & Computer Engineering, Universiti Teknikal Malaysia Melaka, Melaka 76100, Malaysia
3CSIR-Central Glass and Ceramic Research Institute, Jadavpur, Kolkata 700032, India
4Department of Electrical Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
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| Cite this article: |
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A. A. Latiff, A. Dhar, S. W. Harun et al 2016 Chin. Phys. Lett. 33 054202 |
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Abstract We present an all-fiber dual-wavelength holmium-doped fiber laser operating in 2 μm region using a newly developed holmium-doped fiber (HDF) as a gain medium. The proposed fiber laser is constructed by using a hybrid gain medium, i.e., a thulium–ytterbium co-doped fiber (TYDF) and an HDF in conjunction with a simple half-opened linear cavity, which is formed by a broadband mirror and an output coupler reflector. Without the HDF, the TYDF laser operates at wavelengths of 1991 and 1999 nm with a signal-to-noise ratio of more than 34 dB and the slope efficiency of 26.16 %. With the HDF, dual-wavelength output lines are obtained at 2075 and 2083 nm with signal-to-noise ratios of more than 17 dB, 3 dB bandwidth of less than 0.2 nm and the power difference between the two peaks of less than 1 dB at the TYDF laser pump power of 320 mW.
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Received: 11 December 2015
Published: 31 May 2016
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