期刊
IEEE PHOTONICS TECHNOLOGY LETTERS
卷 24, 期 9, 页码 754-756出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2012.2188023
关键词
All-normal-dispersion; fiber laser; high-order harmonic mode-locked; long period grating
资金
- Suzhou Municipal Government [SYJG0921]
- Key Laboratory of Modern Optical Technologies of Jiangsu Province [KJS0807]
- University Scientific Research Foundation of Jiangsu Province [09KJA140004, 09KJB140008]
- Innovative Graduate Education Program of Jiangsu Province [CX10B-034Z]
- Priority Academic Program Development (PAPD) Project of the Jiangsu Higher Education Institutions
A tunable high-order harmonic and passively mode-locked Yb-doped fiber laser with all-normal dispersion is demonstrated. Using the mode-locking mechanism of the nonlinear polarization evolution (NPE) effect and a cascade long period fiber grating (C-LPFG) as an all-fiber format spectral filter for the strong pulse shaping, a maximum of 14th-order harmonic mode-locked (HML) Yb-doped fiber laser can be tunably achieved with a repetition rate of 35.497 MHz compared with the fundamental repetition rate of 2.538 MHz, which is the highest harmonic mode-locked laser with all-normal dispersion so far. At the 14th HML output, the cavity supermodes are suppressed to 23 dB, and the pulses duration is 1.23 ns with a maximum pulse energy of 0.97 nJ.
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