| 基于阵列波导光栅的快速波长检测方法 |
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| 引用本文： | 刘志明,李坚,江微微,郑晶晶,范林勇,简水生.基于阵列波导光栅的快速波长检测方法[J].光学与光电技术,2010,8(1):14-19. |
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| 作者姓名： | 刘志明 李坚 江微微 郑晶晶 范林勇 简水生 |
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| 作者单位： | 1. 北京交通大学光波技术研究所,北京,100044;全光网络与现代通信网教育部重点实验室,北京,100044
2. 中国铁道科学研究院通信信号研究所,北京,100081 |
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| 基金项目： | 国家863计划，国家自然科学基金，国家自然科学重点基金，北京市自然科学基金，新世纪优秀人才支持计划，北京交通大学校科技基金 |
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| 摘 要： | 针对现有波长检测技术的不足，提出一种采用阵列波导光栅（AWG）进行波长快速检测的方法，该方法利用AWG对波长信号进行空间分离，将波长信号转化为光场强度信号，利用传统的光场强度检测手段实现波长检测。给出了分析这种检测方法光学特性的数学模型，应用此模型，分析了AWG性能参数对波长检测性能的影响。分析表明：待检测的波长信号可以通过AWG相邻通道的功率比的对数值进行线性表达；减小AWG通道波长间隔或其半波全宽（3dB带宽）可以提高波长检测灵敏度；此方法对AWG的通道不平坦度不敏感；通过对AWG进行±0．1℃的温度控制，此方法可以达到±0．005nm的波长检测精度。
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| 关 键 词： | 传感 阵列波导光栅 光纤光栅 波长检测 |
A Fast Optical Wavelength Detection Method Using Arrayed-Waveguide Grating |
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| LIU Zhi-ming,LI Jian,JIANG Wei-wei,ZHENG Jing-jing,FAN Lin-yong,JIAN Shui-sheng.A Fast Optical Wavelength Detection Method Using Arrayed-Waveguide Grating[J].optics&optoelectronic technology,2010,8(1):14-19. |
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| Authors: | LIU Zhi-ming LI Jian JIANG Wei-wei ZHENG Jing-jing FAN Lin-yong JIAN Shui-sheng |
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| Institution: | 1 Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China; 2 Key Lab of All Optical Network ＆ Advanced Telecommunication Network of EMC, Beijing Jiaotong University, Beijing 100044, China; 3 Signal ＆ Communication Research Institute, China Academy of Railway Sciences, Beijing 100081, China ) |
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| Abstract: | A new method of wavelength detection that employ an arrayed waveguide grating （AWG） is proposed, and its operating features are investigated in details. Wavelength detection can be easily achieved by using traditional means of detecting light intensity of AWG＇s output by this method. An explicit formula based on the Gaussian approximation is given and used to model the characteristics of this method. The results show that the wavelength signal to be detected can be linearly described by the logarithm of adjacent channels＇ power ratio. The wavelength detection sensitivity can be improved by decreasing channel spacing or the full-width at half maximums（FWHM） bandwidths of AWG＇s channels. This method is not sensitive to the insertion loss ripple of AWG. The detection accuracy of ±0.005nm can be obtained by controlling the working temperature of AWG at the accuracy of ±0.1℃ theoretically. |
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| Keywords: | sensing arrayed-waveguide grating fiber Bragg grating wavelength detection |
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