Acta Photonica Sinica, Volume. 45, Issue 2, 206001(2016)
Switchable Quadruplewavelength Fiber Laser Based on Multimode Interference Filter and Birefringent Filter
In order to realize the switchable multiwavelength oscillation, a fiber ring laser based on a multimode interference filter and a birefringent filter was proposed and demonstrated. The filtering characteristic of the cascaded fiber filters was analyzed theoretically, and the irregular side modes of the multimode interference filter can be effectively restrained by cascading birefringent filter. The Polarization Maintaining Erbium Doped Fiber (PMEDF) is utilized to serve as gain medium and a part of birefringent filter simultaneously, the length of the multimode fiber and PMEDF are optimized to match the same wavelength spacing, the filtering period of the cascaded fiber filter is 4.89 nm. The laser could switch to output single, dual, triple and quadruplewavelength by finely adjusting polarization controller in the experiment, sidemode suppression ratios of lasing wavelengths are more than 40dB, and wavelength fluctuations are less than 0.1 nm during a period of 1h.
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ZHANG Le, GUO Yubin, SUN Tiegang, HUO Jiayu, WANG Liang. Switchable Quadruplewavelength Fiber Laser Based on Multimode Interference Filter and Birefringent Filter[J]. Acta Photonica Sinica, 2016, 45(2): 206001
Received: Sep. 6, 2015
Accepted: --
Published Online: Apr. 1, 2016
The Author Email: Le ZHANG (zhangle13@mails.jlu.edu.cn)