648nm激光雪崩抽运掺Tm晶体的本征光学双稳特性研究  

Study on intrinsic optical bistability in Tm-doped laser crystal pumped at 648 nm avalanche wavelength

作　　者：李立 张新陆 陈历学[1] 

机构地区：[1]哈尔滨工业大学物理系,哈尔滨150001 [2]哈尔滨工程大学理学院,哈尔滨150001

出　　处：《物理学报》2008年第1期278-284,共7页Acta Physica Sinica

基　　金：哈尔滨工程大学基础研究基金(批准号:HEUF04014)资助的课题~~

摘　　要：理论研究了648nm激光雪崩抽运掺Tm晶体的本征光学双稳态.根据系统的非线性速率方程理论,推导出了稳态近似下雪崩阈值的解析表达式,数值研究了光子雪崩动力学响应、本征光学双稳性以及系统参数对光学双稳态的影响等.研究结果表明,648nm激光抽运下可以观察到掺Tm激光晶体的2μm荧光辐射本征光学双稳态,通过改变可控的实验参数能够实现对光学双稳回线环的形状调节.Intrinsic optical bistability （IOB） in Tm-doped laser crystal pumped at 648 nm avalanche wavelength is predicted theoretically and studied numerically. Based on the theory of nonlinear rate equations, the analytical formula of avalanche threshold condition is deduced in the steady-state approximation. Transient response of photon avalanche, IOB and influence of system parameters on IOB are studied numerically. The numencal simulation shows that IOB of 2μm fluorescence emission in Tm-doped laser crystal can be experimentally observed. Controllable bistable hysteresis loop can be achieved by adjusting experimentally adjustable parameters.

关 键 词：光学双稳 动力学 掺Tm晶体 光子雪崩 

分 类 号：TN241[电子电信—物理电子学] O437[机械工程—光学工程]