대한전자공학회논문지SD (Journal of the Institute of Electronics Engineers of Korea SD)

대한전자공학회 (The Institute of Electronics and Information Engineers)
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양자 교환된 리튬나오베이트를 이용한 광 픽업용 λ/2 파장판 제작

Fabrication of λ/2 Phase Plates for Optical Pickup Using a Proton Exchanged LiNbO$_{3}$

  • 손경락 (경북대학교 전자전기공학부) ;
  • 김광택 (경북대학교 전자전기공학부) ;
  • 김영조 (경북대학교 전자전기공학부) ;
  • 송재원 (경북대학교 전자전기공학부) ;
  • 박경찬 (LG 전자 디지털미디어연구소) ;
  • 김진용 (LG 전자 디지털미디어연구소)
  • Son, Gyeong-Rak (School of Electronic & Electrical Engineering, Kyungpook National University) ;
  • Kim, Gwang-Taek (School of Electronic & Electrical Engineering, Kyungpook National University) ;
  • Kim, Yeong-Jo (School of Electronic & Electrical Engineering, Kyungpook National University) ;
  • Song, Jae-Won (School of Electronic & Electrical Engineering, Kyungpook National University) ;
  • Park, Gyeong-Chan (The Digital Media Research Center of LG Electronics) ;
  • Kim, Jin-Yong (The Digital Media Research Center of LG Electronics)
  • 발행 : 2000.04.01
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초록

본 논문에서는 리튬나오베이트 기판 상에 벤젠산으로 양자 교환 후 습식 식각하는 방법을 이용하여 청색레이저 다이오드를 광원으로 사용하고자 하는 광 픽업을 위한 λ/2 파장판을 제작하였으며 소자의 기능과 제작과정에 대해서 상세히 서술하였다. 그리고, 소자제작을 위한 최적의 조건을 실험을 통하여 확립하였다. 제작된 소자의 위상 특성은 광학계로 마하젠더 간섭계를 구성하여 파장이 632.8nm인 헬륨-네온 레이저로 측정하였다. 측정 결과 위상오차는 ＋5°∼6°(3% 이내)로 측정되었다. 본 연구에서 제작한 파장판은 청색 레이저 다이오드를 광원으로 사용하는 광 픽업 시스템의 해상도와 안정도를 향상시키는 유용한 소자로 응용될수 있다.

In this paper, we have been fabricated λ/2 phase plates lot an optical pick-up using a blue violet laser diode by employing proton exchange and wet etching in LiNbO$_{3}$. Their functions and fabrication processes are described in detail. It is established the optimal fabrication conditions through the experimental results. The device characteristics are measured by the Mach-zender interferometer which is composed of the optical components and 632.8nm He-Ne laser. The measured phase error was ＋5$^{\circ}$~ -6$^{\circ}$(within 3%). This phase plate could be applied an useful device to improve the resolution and the stability of the optical pick-up which has a blue violet laser diode as an optical source.

키워드

참고문헌

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