光纤背向激光自发喇曼散射的温度效应研究

RESEARCH OF TEMPERATURE EFFECT ON BACK-DIRECTION LASER SPONTANEOUS RAMAN SCATTERING IN OPTICAL FIBER

从理论和实验上研究了光纤背向激光自发喇曼散射的温度效应.光纤背向激光自发反斯托克斯喇曼散射、斯托克斯喇曼散射光的相对强度正比于光纤分子上、下能级粒子数的布居,依赖于温度.由于实际系统中,作为分光用的干涉滤光片不可能完全隔离背向瑞利散射光,因此,实际系统温度曲线比理论曲线低,本文给出了理论修正公式,提出了附加修正项,它与隔离度和波长有关.

The temperature effect of back-direction laser spontaneous Raman scattering in optical fiber is researched.The relative intensity ratio between anti-Stokes Raman scattering and Stokes Raman scattering is proportional to the population of upper and lower energy states of optical fiber molecule, it is dependent on temperature.In the pratical system,the back - direction Rayleigh scattering isn't isolated entirely by optical interference filter,so the temperature curve of practical system is lower than the theoretical curve.In this paper,the theoretical correct formula and correct term are given,it is dependent on isolation and wavelength of optical filter.