Su Chen, Weixiang Hu, Yang Xu, Yu Cai, Zhiqiang Wang, Zuxing Zhang. Mode-locked pulse generation from an all-FMF ring laser cavity[J]. Chinese Optics Letters, 2019, 17(12): 121405
- Chinese Optics Letters
- Vol. 17, Issue 12, 121405 (2019)
Fig. 1. Structure of the WDM-MSC.
Fig. 2. (a) Converted
Fig. 3. ASE spectra under different pump powers.
Fig. 4. Amplified spectra of the FM-EDF amplifier (a) with different pump powers of
Fig. 5. Schematic setup of our proposed all-FMF ring laser. FM-EDF: few-mode erbium-doped fiber; ISO: isolator; CNT-SA: carbon nanotube saturable absorber; OSA: optical spectrum analyzer; OSC: oscilloscope; CCD: charge coupled device; Col: collimator; PC: polarization controller.
Fig. 6. Output mode-locked (a) pulse trains, (b) spectrum at a pump power of 340 mW.
Fig. 7. (a) Mode-locked optical spectrum evolution with different pump powers; (b) average output power and 3 dB bandwidth versus pump power.
Fig. 8. (a) RF spectrum of the all-FMF laser with a span of 1 GHz, (b) the fundamental peak located at the cavity repetition rate of 30.58 MHz with a resolution bandwidth of 1 Hz.
Fig. 9. Intensity distributions of (a) APB and (b) RPB without a polarizer before and after passing a linear polarizer.
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