Fig. 1. Energy-level diagram for optically pumped alkali amplifier (OPAA) and saturated absorption spectra (SAS) of D1 and D2 transition of Cs atom. (a) Three-level atomic system with 5S5/2, 5P5/2, and 5P7/2 states of Cs. (b) SAS of the D2 transition for pump laser. (c) SAS of the D2 transition for signal laser.
Fig. 2. Experimental setup for OPAA in Cs vapor cell with ethane buffer gas. Pump laser (wavelength 852 nm); signal laser (wavelength 895 nm); OI, optical isolator; SMF, single mode fiber; PBS, polarization beam splitter; HWP, half-wave plate; BF, bandpass filter.
Fig. 3. Cs amplifier small signal amplification factor vs pump power according to the cell temperature (105℃, 110℃, and 115℃) under the condition of input signal of 0.1 mW.
Fig. 4. Temperature dependence of (a) amplification coefficient and (b) gain coefficient under the condition of input signal of 0.1 mW and pump of 200 mW.
Fig. 5. Cs amplifier small signal amplification factor vs pump power according to the input signal power (0.1 mW, 1 mW, 3 mW, 5 mW, and 10 mW) at the cell temperature of 115℃.
Fig. 6. Input signal power dependence of (a) amplification coefficient and (b) gain extraction efficiency relative to the pump power under the condition of pump of 200 mW at the cell temperature of 115℃.
참고문헌
- A. Sharma, N. D. Bhaskar, Y. Q. Lu, and W. Happer, "Continuous-wave mirrorless lasing in optically pumped atomic Cs and Rb vapors," Appl. Phys. Lett. 39, 209-211 (1981). https://doi.org/10.1063/1.92681
- W. F. Krupke, R. J. Beach, V. K. Kanz, and S. A. Payne, "Resonance transition 795-nm rubidium laser," Opt. Lett. 28, 2336-2338 (2003). https://doi.org/10.1364/OL.28.002336
- W. F. Krupke, R. J. Beach, V. K. Kanz, and S. A. Payne, "DPAL: A new class of CW, near-infrared highpower diode pumped alkali (vapor) lasers," Proc. SPIE 5334, 156-167 (2004).
- R. J. Beach, W. F. Krupke, V. K. Kanz, and S. A. Payne, "End-pumped continous-wave alkali vapor lasers: experiment, model, and power scaling," J. Opt. Soc. Am. B 21, 2151-2163 (2004). https://doi.org/10.1364/JOSAB.21.002151
- T. Ehrenreich, B. Zhdanov, T. Takekoshi, S. P. Phipps, and R. J. Knize, "Highly efficient optically pumped Cs vapor laser," Opt. Commun. 260, 696-698 (2006). https://doi.org/10.1016/j.optcom.2005.11.042
- R. H. Page, R. J. Beach, V. K. Kanz, and W. F. Krupke, "Multimode-diode-pumped gas (alkali-vapor) laser," Opt. Lett. 31, 353-355 (2006). https://doi.org/10.1364/OL.31.000353
- Y. Wang, T. Kasamatsu, Y. Zheng, H. Miyajima, H. Fukuoka, S. Matsuoka, M. Niigaki, H. Kubomura, and H. Kan, "Cesium vapor laser pumped by a volume-bragg-grating coupled quasi-continuous-wave laser diode array," Appl. Phys. Lett. 88, 141112 (2006). https://doi.org/10.1063/1.2192975
- Y. Wang, M. Niigaki, H. Fukuoka, Y. Zheng, H. Miyajima, S. Matsuoka, H. Kubomura, T. Hiruma, and H. Kan, "Approaches of output improvement for cesium vapor laser pumped by a volume-Bragg-grating coupled laser-diode-array," Phys. Lett. A 360, 659-663 (2007). https://doi.org/10.1016/j.physleta.2006.08.080
- T. A. Perschbacher, D. A. Hostutler, and T. M. Shay, "High-efficiency diode-pumped rubidium laser: experimental results," Proc. SPIE 6346, 634607 (2007).
- B. V. Zhdanov and R. J. Knize, "Diode pumped 10 Watts continous wave cesium laser," Opt. Lett. 32, 2167-2169 (2007). https://doi.org/10.1364/OL.32.002167
- B. V. Zhdanov, A. Stooke, G. Boyadjian, A. Voci, and R. J. Knize, "Laser diode array pumped continuous wave Rubidium vapor laser," Opt. Express 16, 748-751 (2008). https://doi.org/10.1364/OE.16.000748
- B. V. Zhdanov, A. Stooke, G. Boyadjian, A. Voci, and R. J. Knize, "Rubidium vapor laser pumped by two laser diode arrays," Opt. Lett. 33, 414-415 (2008). https://doi.org/10.1364/OL.33.000414
- S. Wu, T. Soules, R. Page, S. Mitchell, C. Scott, V. Kanz, and R. Beach, "Hydrocarbon-free resonance transition 795-nm rubidium laser," Opt. Lett. 32, 2423-2425 (2007). https://doi.org/10.1364/OL.32.002423
- B. V. Zhdanov and R. J. Knize, "Efficient diode pumped cesium vapor amplifier," Opt. Commun. 281, 4068-4070 (2008). https://doi.org/10.1016/j.optcom.2008.04.018
- D. A. Hostutler and W. L. Klennert, "Power enhancement of a Rubidium vapor laser with a master oscillator power amplifier," Opt. Express 16, 8050-8053 (2008). https://doi.org/10.1364/OE.16.008050