Singh G, Purnawirman P, Bradley J D B, Li N, Magden E S, Moresco M, Adam T N, Leake G, Coolbaugh D, Watts M R
Opt Lett. 2016 Mar 15;41(6):1189-92. doi: 10.1364/OL.41.001189.
This Letter reports on an optical pumping scheme, termed resonant pumping, for an erbium-doped distributed feedback (DFB) waveguide laser. The scheme uses two mirrors on either side of the DFB laser, forming a pump cavity that recirculates the unabsorbed pump light. Symmetric distributed Bragg reflectors are used as the mirrors and are designed by matching the external and internal quality factors of the cavity. Experimental demonstration shows lasing at an optical communication wavelength of around 1560 nm and an improvement of 1.8 times in the lasing efficiency, when the DFB laser is pumped on-resonance.
本信函报道了一种用于掺铒分布反馈（DFB）波导激光器的光泵浦方案，称为共振泵浦。该方案在DFB激光器两侧使用两个反射镜，形成一个泵浦腔，使未被吸收的泵浦光再循环。对称分布布拉格反射器用作反射镜，并通过匹配腔的外部和内部品质因数进行设计。实验证明，当DFB激光器进行共振泵浦时，在约1560 nm的光通信波长处实现了激光发射，且激光效率提高了1.8倍。
