Original Articles |
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Yb3+-Doped Non-π-Phase-Shifted Distributed Feedback
Fibre Lasers |
FAN Wei;CHEN Bai;LI Xue-Chun;CHEN Lan-Rong;CHEN Shao-He;LIN Zun-Qi |
Shanghai Institute of Optics and Fine Mechanics, Chinese
Academy of Sciences, Shanghai 201800 |
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Cite this article: |
FAN Wei, CHEN Bai, LI Xue-Chun et al 2002 Chin. Phys. Lett. 19 1108-1111 |
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Abstract Distributed feedback (DFB) fibre lasers usually have two longitudinal modes symmetrically located at each side of the Bragg wavelength because they have the same lowest gain threshold. In order to obtain single longitudinal output, π-phase-shift, DFB fibre lasers were often adopted. However, we found that, even with no π-phase-shift, the single frequency output can be acquired from Yb3+-doped fibre DFB lasers. The polarization beat frequency was measured to be 366 MHz.
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Keywords:
42.55.Wd
42.60.-v
42.81.Wg
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Published: 01 August 2002
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PACS: |
42.55.Wd
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(Fiber lasers)
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42.60.-v
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(Laser optical systems: design and operation)
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42.81.Wg
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(Other fiber-optical devices)
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