自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 11    No. 3    September 2004

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Structure analysis of optical fiber coupler with infrared spectrometry
DUAN Ji-an(段吉安), SHUAI Ci-jun(帅词俊), MIAO Jian-yu(苗健宇),
ZHONG Jue(钟 掘)

School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China

Abstract:To obtain excellent performance optical fiber couplers, the structural difference of SiO2in couplers with different manufacturing techniques was investigated. With 740-FT-IR infrared spectrometric analyzer, the infrared absorption spectrum of SiO2in couplers at different drawing velocities was measured, and two characteristic peaks in the wavenumber range of 650 2000 cm-1were observed. One characteristic peak is at about 943 cm-1, which is attributed to Si—O—Si bond asymmetric stretching vibration, the other is at about 773 cm-1, which is attributed to Si—O—Si bond symmetric stretching vibration. From the infrared spectrum, it is found that the intensity and wavenumber of the characteristic peaks are related to the manufacturing technique of couplers. The characteristic peak at about 943 cm-1becomes steeper when increasing the drawing velocity. At the drawing velocity of 150μm/s, the distance between the two characteristic peaks is maximum, and then the optical fiber coupler has excellent performance, indicating that the performance of the optical fiber coupler has a close relationship with the wavenumber of the two characteristic peaks.

 

Key words: optical fiber coupler; fused biconical taper; infrared spectrometry; SiO2; structure

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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