基于啁啾光纤光栅的波长解调仪研究
发布时间：2019-04-26 03:37
【摘要】：目前,在市场上还没有发现基于啁啾光纤光栅的波长解调仪产品,但其具有的潜在优势不可忽视,如全光结构设计,无需机械调谐,提高了解调速率;波长解调精度和动态范围可根据需求调整;支持串、并联两种网络拓扑结构和成本低等。解调方案基于强度测量原理,所测光强与波长存在一一对应关系,但受制于光器件温度敏感性,保证系统温度稳定性是需解决的关键问题。本文研究题目是基于啁啾光纤光栅的波长解调仪研究,设计目标包括0~50℃范围内解调波长温度稳定性控制在10nm内等,主要内容如下:1)设计了基于啁啾光纤光栅的波长解调系统。在光源和环形器间增加光隔离器,降低了反射光对光源输出功率稳定性的影响;将光、电路中的器件用熔接形式封装成盒,便于对密闭空间温度补偿,降低温度变化对系统整体性能的影响;针对光耦合器分光比易受温度变化影响,采用基于三路光强解调的修正方案,将经过啁啾光纤光栅的透射光加入计算,保证计算中分母的准确性,降低测量误差。实验采用温控装置对波长解调仪在同一中心波长下的测量结果多次检测并取平均值,在0~50℃范围内的最大波长变化量减小到8pm,约是补偿前的50%,即该波长解调仪的温度稳定性可达到8pm。2)将团队研制的啁啾光纤光栅作为解调器,设计并制作了波长解调仪的性能样机,通过评估系统性能指标,合理设计光电转换和信号处理电路及器件选型,实现一套完整的电路解决方案。利用上述器件搭建基于啁啾光纤光栅的三路光强修正的波长解调系统并测试,测试结果表明:所设计的波长解调仪可实现波长动态范围为1514.39~1524.51nm,单路解调波长精度最小值为1.9pm、最大值为16.4pm,多路波长精度平均值为6.78pm。本文创新点是采用团队研制的啁啾光纤光栅作为解调器,制作波长解调仪性能样机,在设计中考虑到光路器件的温度敏感性,如光耦合器分光比的温度波动等,提出了基于三路光强解调的修正方案。保证系统温度稳定性提高同时,可根据需求动态调整解调精度和测量路数,使解调仪在各项指标上达到或接近设计目标水平。本文所做工作对推动采用啁啾光纤光栅实现波长解调方案在实验室阶段的研究和大规模应用具有实用价值。
[Abstract]:At present, the wavelength demodulator based on chirped fiber grating has not been found in the market, but its potential advantages should not be ignored, such as all-optical structure design, without mechanical tuning, so as to improve the demodulation rate. Wavelength demodulation precision and dynamic range can be adjusted according to the demand, supporting serial, parallel network topology and low cost. The demodulation scheme is based on the principle of intensity measurement. There is a one-to-one correspondence between the measured light intensity and the wavelength. However, due to the temperature sensitivity of the optical device, the key problem to be solved is to ensure the temperature stability of the system. The research topic of this paper is the research of wavelength demodulation instrument based on chirped fiber grating. The design objectives include demodulating wavelength and temperature stability in the range of 0 鈩，
本文编号：2465716
[Abstract]:At present, the wavelength demodulator based on chirped fiber grating has not been found in the market, but its potential advantages should not be ignored, such as all-optical structure design, without mechanical tuning, so as to improve the demodulation rate. Wavelength demodulation precision and dynamic range can be adjusted according to the demand, supporting serial, parallel network topology and low cost. The demodulation scheme is based on the principle of intensity measurement. There is a one-to-one correspondence between the measured light intensity and the wavelength. However, due to the temperature sensitivity of the optical device, the key problem to be solved is to ensure the temperature stability of the system. The research topic of this paper is the research of wavelength demodulation instrument based on chirped fiber grating. The design objectives include demodulating wavelength and temperature stability in the range of 0 鈩，
本文编号：2465716
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