Bo Guo, Yong Yao, Yan-Fu Yang, Yi-Jun Yuan, Lei Jin, Bo Yan, Jian-Yu Zhang. Dual-wavelength rectangular pulse erbium-doped fiber laser based on topological insulator saturable absorber[J]. Photonics Research, 2015, 3(3): 94
- Photonics Research
- Vol. 3, Issue 3, 94 (2015)
Fig. 1. (a) SEM images of the TI : Bi 2 Se 3 / PVA TI : Bi 2 Se 3 / PVA TI : Bi 2 Se 3 / PVA TI : Bi 2 Se 3
Fig. 2. Nonlinear saturable absorption curve of the TI : Bi 2 Se 3 / PVA
Fig. 3. Experimental setup of dual-wavelength rectangular pulses fiber laser with a TI SA. EDF, erbium-doped fiber.
Fig. 4. Typical dual-wavelength rectangular pulse characteristics at the pump power of 90 mW; (a) output optical spectrum; (b) pulse train; (c) zoom-in single-pulse profile; (d) RF spectrum (inset, RF spectrum measured in 500 MHz range).
Fig. 5. (a) Output average power and pulse width; (b) pulse energy and peak power of rectangular pulse versus incident pump power.
Fig. 6. Typical time-domain characteristics of the rectangular pulse with different length of the SMF. Pulse train and corresponding single pulse profile of the rectangular pulse when (a) L SMF = 63 m β 2 , cavity = approximately − 1.34 ps 2 L SMF = 73 m β 2 , cavity = approximately − 1.57 ps 2 L SMF = 93 m β 2 , cavity = approximately − 2.03 ps 2 L SMF = 110 m β 2 , cavity = approximately − 2.42 ps 2
Fig. 7. Oscilloscope traces of first, second, third, and fifth HML of the dual-wavelength rectangular pulse when properly adjusting the pump power and the polarization state.
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