All-polarization-maintaining figure-eight Er-fiber ultrafast laser with a bidirectional output coupler in the loss-imbalanced nonlinear optical loop mirror

Junkai Shi; Yao Li; Shuyuan Gao; Yingling Pan; Guoming Wang; Rongyi Ji; Weihu Zhou

doi:10.3788/COL201816.121404

Journals >Chinese Optics Letters >Volume 16 >Issue 12 >Page 121404 > Article

Chinese Optics Letters
Vol. 16, Issue 12, 121404 (2018)

All-polarization-maintaining figure-eight Er-fiber ultrafast laser with a bidirectional output coupler in the loss-imbalanced nonlinear optical loop mirror

Junkai Shi¹, Yao Li¹, Shuyuan Gao¹, Yingling Pan¹, Guoming Wang¹, Rongyi Ji¹, and Weihu Zhou^1、2、*

Author Affiliations

¹Laboratory of Laser Measurement Technology, Academy of Opto-Electronics, Chinese Academy of Sciences, Beijing 100094, China

²University of Chinese Academy of Sciences, Beijing 100049, China

show less

DOI: 10.3788/COL201816.121404 Cite this Article Set citation alerts

Junkai Shi, Yao Li, Shuyuan Gao, Yingling Pan, Guoming Wang, Rongyi Ji, Weihu Zhou. All-polarization-maintaining figure-eight Er-fiber ultrafast laser with a bidirectional output coupler in the loss-imbalanced nonlinear optical loop mirror[J]. Chinese Optics Letters, 2018, 16(12): 121404 Copy Citation Text

EndNote(RIS)

BibTex

Plain Text

show less

(a) Normalized transmissivity and (b) the slope of normalized transmissivity as a function of |Ein|2L under the conditions of the symmetric coupler with a power attenuator (α=0.5, β=0.1, black solid curve), small splitting ratio (α=0.45, β=1, red dash curve), and large splitting ratio (α=0.1, β=1, blue short dash curve) without a power attenuator.

Fig. 1. (a) Normalized transmissivity and (b) the slope of normalized transmissivity as a function of |Ein|2L under the conditions of the symmetric coupler with a power attenuator (α=0.5, β=0.1, black solid curve), small splitting ratio (α=0.45, β=1, red dash curve), and large splitting ratio (α=0.1, β=1, blue short dash curve) without a power attenuator.

Download full size | View in the Article

Schematic of the experimental setup: LD, laser diode; WDM, wavelength division multiplexer; OC, optical coupler; EDF, Er-doped fiber; BPF, bandpass filter; PF, passive fiber; OI, optical isolator; OP, output.

Fig. 2. Schematic of the experimental setup: LD, laser diode; WDM, wavelength division multiplexer; OC, optical coupler; EDF, Er-doped fiber; BPF, bandpass filter; PF, passive fiber; OI, optical isolator; OP, output.

Download full size | View in the Article

Fig. 3. Output power as a function of pump power.

Download full size | View in the Article

Fig. 4. Mode-locked outputs of the figure-eight oscillator at the pump power of 760 mW. Experimentally observed (a) autocorrelation traces, (b) spectra in the linear scale (inset: spectra in log scale), (c) pulse trains, and (d) radio-frequency spectra (inset: radio-frequency spectra in a wider range) of the CW and CCW output pulses.

Download full size | View in the Article