Xin Zhao, Zheng Song, Yuan-Ji Li, Jin-Xia Feng, Kuan-Shou Zhang. High efficiency sub-nanosecond electro–optical Q-switched laser operating at kilohertz repetition frequency[J]. Chinese Physics B, 2020, 29(8):
- Chinese Physics B
- Vol. 29, Issue 8, (2020)
Fig. 1. Driving signal of Pockels cell, where solid curve denotes measured data, and dashed and dotted curve refer to simulated results from Eq. (6 ).
Fig. 2. Simulated pulse shapes of an EO Q -switched laser at different values of V hl.
Fig. 3. Time-dependent losses of Q -switch at different values of V hl.
Fig. 4. Stimulated emission cross-section versus doping concentration at laser wavelength.
Fig. 5. Laser pulse width and pulse energy versus doping concentration.
Fig. 6. Schematic diagram of EO Q -switched laser. VBG: volume Bragg grating; TFP: thin film polarizer; OC: output coupler; QWP: quarter wave plate; PC: Pockels cell; BS: beam splitter; PBS: polarization beam splitter; PD: photodiode; EM: energy meter.
Fig. 7. Single pulse shapes at different values of V hl: (a) V hl = V λ /4, (b) laser from OC at V hl = 1.4V λ /4, (c) laser from TFP at V hl = 1.4V λ /4, (d) combination of the laser from OC and TFP at V hl = 1.4V λ /4.
Fig. 8. (a) Pulse width and (b) pulse energy of pulse laser combination versus V hl/V λ /4 for three different values of C d.
Fig. 9. Plots of measured beam radius versus beam position in x and y directions for the combination of pulse lasers.
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