• Title/Summary/Keyword: Cesium vapor laser

Search Result 4, Processing Time 0.058 seconds

Optimization of Diode-pumped Cesium Vapor Laser Using Frequency Locked Pump Laser

  • Hong, Seongjin;Kong, Byungjoo;Lee, Yong Soo;Oh, Kyunghwan
    • Current Optics and Photonics
    • /
    • v.2 no.5
    • /
    • pp.443-447
    • /
    • 2018
  • We propose a diode-pumped cesium laser using frequency locking of a pump laser that can effectively increase the maximum output power of the cesium laser. We simultaneously monitored the absorption spectrum of cesium and the laser output power, and the frequency of pump laser was locked at the center of the $D_2$ absorption line of the cesium atom to obtain an effective gain enhancement. Using this scheme, we have achieved output power increase of ~0.1 W compared to when frequency locking was not applied. Furthermore, by optimizing the temperature of the cesium cell and the reflectivity of the output coupler, we successfully achieved an output power of 1.4 W using the pump power of 2.9 W, providing a slope efficiency of 61.5% and optical-to-optical efficiency of 49%.

Light Amplification in Diode-pumped Cesium Vapor Cell (다이오드 펌프 세슘 원자 증기에서의 증폭)

  • Hwang, Jongmin;Jeong, Taek;Moon, Han Seb
    • Korean Journal of Optics and Photonics
    • /
    • v.29 no.6
    • /
    • pp.247-252
    • /
    • 2018
  • We report amplification of a small signal in a diode-pumped Cs vapor cell with 500 torr of ethane buffer gas, in the low-pump-power regime of 200 mW or less. For efficient amplifier operation, the pump and signal beams were coupled to a single-mode optical fiber, and completely overlapped in the Cs vapor cell. We investigated the amplification of the small signal according to cell temperature, signal power, and pump power. An amplification factor of 56 was achieved under the conditions of cell temperature of $115^{\circ}C$, signal power of 0.1 mW, and pump power of 200 mW.

Observation of dispersion-like signal based on velocity-selsctive saturated absorption spectroscopy and frequency stabilization of diode laser (속도선택 포화흡수분광을 이용한 분산형 신호의 관측 및 반도체 레이저의 주파수안정화)

  • Park, Sang-Eon;Cho, Hyuck;Kwon, Taeg-Yong;yang, Sung-Hoon;Lee, Ho, Seung
    • Korean Journal of Optics and Photonics
    • /
    • v.12 no.3
    • /
    • pp.158-164
    • /
    • 2001
  • We observed a velocity-selective saturated absorption spectrum when the pump beam intersects the probe beam at a finite angle with a saturated absorption spectroscopic configuration in the cesium vapor cell. And we also observed a dispersion-like signal by measuring the difference between two velocity-selective absorption spectra produced by two parallel probe beams intersected by one pump beam. The dispersion-like signal was changed with the crossing angle and the crossing position of the pump and probe beams and compared with the calculated result. The dispersion-like signal was used as a frequency discriminator, and the laser could be frequency-stabilized without any frequency modulation. As a result, the square root of Allan variance was $\sigma_y(\tau=1s)=7$\times10^{-12}$, for the sampling time of 1 s.of 1 s.

  • PDF