用窄带滤光片作为调谐元件的外腔半导体激光器

An External Cavity Semiconductor Laser Using a Narrow-band Filter as the Tuning Element

分析了窄带滤光片的调谐原理，拟合了一块实际滤光片的透射率函数，它是理论的透射率函数和一个洛仑兹函数的乘积。利用１．３μｍ的外腔式调谐激光器实现了１２７２．５ｎｍ至１２９１．７ｎｍ范围内的不连续宽带调谐。

Numerical fitting reveals that the transmitting function of the filter used in this work can be described by the product of a Lorentzian function and the standard transmitting function of the filter. Using this filter as the tuning element of an external cavity semiconductor laser, a tuning range of ￣20 nm from 1272. 5 nm to 1291. 7nm has been achieved.