Multi-wavelength ytterbium doped fiber laser based on longitudinal mode interference |
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| Authors: | N S Shahabuddin M A Ismail M C Paul S S A Damanhuri S W Harun H Ahmad M Pal S K Bhadra |
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| Institution: | 1.Department of Electrical Engineering, Faculty of Engineering,University of Malaya,Kuala Lumpur,Malaysia;2.Fiber Optics and Photonics Division, Central Glass and Ceramic Research Institute,CSIR,Kolkata,India;3.Photonics Research Center, Department of Physics,University of Malaya,Kuala Lumpur,Malaysia |
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| Abstract: | Multi-wavelength Ytterbium-doped fiber laser (YDFL) is demonstrated using a longitudinal mode interference assisted by a four-wave
mixing (FWM) effect in a ring laser cavity. The gain medium is a 16 m long of the fabricated (Ytterbium-doped fiber) YDF,
which has a core composition of 0.8 wt % of Yb2O3, 1.8 wt % of Al2O3 and 23 wt % of GeO2, Ytterbium ion fluorescence lifetime of 1.1 ms and absorption of 9.0 dB/m at the pump wavelength of 976 nm. 20 m long photonic
crystal fiber (PCF) is used to provide FWM effect so that the energy of different oscillating lines can be redistributed to
improve multi-wavelength operation. The proposed laser generates 12 lines of optical comb with a line spacing of approximately
0.59 nm at 1035 nm region. |
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