Laser diode array side-pumped medium-aperture Nd:glass square rod amplifier

Xiongxin Tang; Jisi Qiu; Zhongwei Fan; Haocheng Wang; Weiran Lin

doi:10.3788/COL201614.021403

Journals >Chinese Optics Letters >Volume 14 >Issue 2 >Page 021403 > Article

Chinese Optics Letters
Vol. 14, Issue 2, 021403 (2016)

Laser diode array side-pumped medium-aperture Nd:glass square rod amplifier

Xiongxin Tang, Jisi Qiu^*, Zhongwei Fan^**, Haocheng Wang, and Weiran Lin

Author Affiliations

The Academy of Opto-Electronics, Chinese Academy of Sciences, Beijing 10094, China

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DOI: 10.3788/COL201614.021403 Cite this Article Set citation alerts

Xiongxin Tang, Jisi Qiu, Zhongwei Fan, Haocheng Wang, Weiran Lin. Laser diode array side-pumped medium-aperture Nd:glass square rod amplifier[J]. Chinese Optics Letters, 2016, 14(2): 021403 Copy Citation Text

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Abstract

A laser diode array side-pumped Nd:glass square rod amplifier of the dimensions

12 mm \times 12 mm

is designed. The fluorescence is evenly distributed in the Nd:glass amplifier. When the pump power is 66.32 kW, the small signal gain increases by 3.23 times. Under the condition of a 1 Hz repetition frequency, 50 mJ of injected seed-light energy, and a

10 mm \times 10 mm

aperture, the output energy of the laser beam can reach 1.62 J during the four-pass amplification. The output energy stability of the laser pulse is 2.94% (RMS), and the square pulse distortion is smaller than 2. The energy amplification of the injected laser beam from millijoules to joules is realized.

G = \frac{E_{s}}{E_{in}} \ln {1 + [\exp (\frac{E_{in}}{E_{s}}) - 1] G_{0}},

(1)

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E_{s} = \frac{h ν}{γ σ} .

(2)

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G \approx G_{0} = \exp (g_{0} l) = \exp (\frac{E_{st} σ l}{h v}) = \exp (\frac{E_{st} A l}{E_{s} A}) = \exp (\frac{ε_{st}}{E_{s} A}),

(3)

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G_{0} = \exp (\frac{η_{st} η_{s} η_{q} η_{a - eff} η_{t} P_{p} t_{p}}{E_{s} A}),

(4)

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η_{st} = \frac{1 - \exp (- t_{p} / τ_{f})}{t_{p} / τ_{f}},

(5)

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E_{n + 1, in} = {TE}_{n, out},

(6)

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η_{E} = \frac{E_{out} - E_{in}}{ε_{st}} .

(7)

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ε_{n + 1, st} = ε_{n, st} - (E_{n, out} - E_{n, in}) = (1 - η_{n, E}) ε_{n, st} .

(8)

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Xiongxin Tang, Jisi Qiu, Zhongwei Fan, Haocheng Wang, Weiran Lin. Laser diode array side-pumped medium-aperture Nd:glass square rod amplifier[J]. Chinese Optics Letters, 2016, 14(2): 021403

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