【摘要】 从Ｈ．Ｈａｋｅｎ的激光理论中的Ｌａｎｇｉｖｅｎ方程出发，给出含饱和吸收介质的环形激光器输出光强的方程，讨论了激光谱线的多普勒展宽对多模环型激光器中光学双稳态产生的影响，定义了双稳面积的范围，得到谱线展宽对多模双稳面积的影响与输出模有关的结论更多还原

【Abstract】 A generalized equation that is satisfied by the output light intensity of this system from the Langiven equation in H.Haken’s Laser theory is first derived Then, the effect of a spectral line with Doppler broadening on optical bistability in a multi mode ring laser which contains a saturable absorber of two level atoms is discussed,and the square of bistability loop is defined.The result that the square of the bistability loop increases with the increase of Doppler broadening as ε>2|ω 0-Ω j| ,and the square of the loop decreases with the increase of broadening as ε<2|ω 0-Ω j| is obtained.更多还原