Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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I2-Saturated Absorption Spectroscopy for Frequency-Stabilization of He-Ne Laser at 543 nm

543 nm 헬륨네온 레이저의 주파수 안정화를 위한 I2 포화흡수분광

  • Kim, Kyung-Chan (Dept. of Chemistry, Keimyung University) ;
  • Eum, Nyeon-Sik (Center for IT-Medical Device Convergence, Keimyung University) ;
  • Hong, Joo-Hyun (Center for IT-Medical Device Convergence, Keimyung University) ;
  • Seo, Ho-Sung (Korea Research Institute of Standards and Science)
  • 김경찬 (계명대학교 자연과학대학 화학과) ;
  • 엄년식 (계명대학교 의료기기인력양성센터) ;
  • 홍주현 (계명대학교 의료기기인력양성센터) ;
  • 서호성 (한국표준과학연구원 길이시간센터)
  • Received : 2009.10.09
  • Accepted : 2010.03.18
  • Published : 2010.03.31
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Abstract

We have designed and assembled a saturated absorption-spectroscopy system of $^{127}I_2$ for the frequency stabilization of the 543 nm He-Ne laser. The frequency of a internal-mirror 543 nm He-Ne laser was swept by utilizing the temperature and PZT change of the laser cavity length. Frequency modulation was applied to the output laser mirror with a PZT modulator for the third harmonic signal. A portion of the hyperfine spectrum originated from the R(12)26-0 and R(106)28-0 transitions of the B-X system of $^{127}I_2$ was observed as the third-derivative signal using a saturated absorption spectroscopy. The signal-to-noise ratio of a typical hyperfine spectrum signal was estimated to be 30:1.

본 연구는 543 nm 헬륨네온 레이저의 주파수 안정화를 위한 $^{127}I_2$ 포화흡수분광 장치의 설계와 제작에 관한 것이다. 온도와 PZT 변화에 의한 레이저관 길이 가변을 이용하여 543 nm 헬륨네온 레이저의 주파수를 주사시켰다. 3차 고조파 신호을 얻기 위해 PZT 변조 가능한 레이저 출력경을 이용하여 주파수 변조를 하였다. 그 결과, $^{127}I_2$용 B-X 시스템의 R(12) 26-0에서 R(106) 28-0의 천이를 가지는 초미세구조 분광은 포화흡수분광기를 사용한 3차 미분신호에서 관찰되었다. 또한, 전형적인 초미세구조 분광 신호의 신호대 잡음비는 약 30:1 로 얻어졌다.

Keywords

References

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