Diode pumped rubidium vapor laser with linearly polarized fundamental mode output
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摘要: 采用2400 l/mm的平面光栅搭建Littrow外腔压窄半导体激光器输出激光线宽，获得中心波长可调的线宽0.16 nm的半导体激光作为铷蒸气激光的泵浦源。实验中，使用斩波器将泵浦光变为脉宽1 ms，重复频率100 Hz的重复脉冲形式，聚焦进长度为8 mm的铷蒸气泡，泡内充入79 kPa甲烷作为缓冲气体。进入铷蒸气泡的泵浦光峰值功率为1.84 W时，控制铷泡温度在125 ℃，获得了峰值功率17.5 mW的基模线偏振铷激光输出。
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关键词:
- 半导体泵浦碱金属蒸气激光器 /
- 铷蒸气激光器 /
- Littrow外腔
Abstract: A Littrow external cavity was built to narrow the spectral linewidth of a diode laser to 0.16 nm by using a 2400 line/mm plane grating, with the center wavelength of the laser tunable. The laser was used as the pump source of the rubidium vapor laser. A chopper was employed to change the continuous laser to pulsed laser with the pulse width of 1 ms and the repetition rate of 100 Hz, then the laser was focused to a Rb vapor cell with the length of 8 mm which was filled with Methane at the pressure of 79 kPa. With the maximum peak power of the pulsed laser injected into the Rb cell is 1.84 W and the temperature of the cell is controlled at about 125 ℃, the linearly polarized fundamental mode Rb laser with the peak power of 17.5 mW is obtained. -
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