摘要
当高斯脉冲串在光纤中运行时,脉冲功率耗散使光纤温度上升,引起光纤折射率变化,结果产生热折射噪声．在利用光孤子存储环探测引力红移时,热折射噪声会影响光孤子的运行时间,这种影响可以由研究高斯脉冲串给出．在光纤一维热传导方程的基础上,计算出了光纤温度涨落的上限,并确定了脉冲串总运行时间的上限跟脉冲串比特率的关系．通过该关系,人们可以根据运行时间的变化和测量装置灵敏度的要求来选择合适的脉冲串的比特率,从而对设计使用光孤子存储环之类的脉冲串的装置提供帮助,为光孤子存储环探测引力红移提供参考依据．
When Gauss pulse streams run in the fiber, the power loss induces the increase of fiber temperature, which is thermo-refractive noise. The thermo-refractive noise influences the runtime of optical solitons in the detection of gravitational redshift by optical solitons storage rings. Based on 1-dimension（I-D） thermal conduction equation, the authors calculate the upper limit of the fluctuation of the fiber temperature. The relation between the upper limit of the total runtime and the bit rate of the stream is deduced too. According to this relation, one can choose an appropriate bit rate of pulse stream in term of runtime variance and the sensitivity required by the measurements. It avails to design a measurement by using pulse streams involving optical solitons in storage rings. And it also gives a reference for the detection of gravitational redshift by optical solitons storage rings.
出处
《量子电子学报》
CAS
CSCD
北大核心
2007年第3期381-386,共6页
Chinese Journal of Quantum Electronics
基金
国家基础研究发展重要规划(2003CB716300)
国家自然科学基金(10121503)
