Sumetsky M, DiGiovanni D J, Dulashko Y, Liu X, Monberg E M, Taunay T F
OFS Laboratories, Somerset, NJ 08873, USA.
Opt Express. 2012 May 7;20(10):10684-91. doi: 10.1364/OE.20.010684.
We introduce multiple series of uncoupled and coupled surface nanoscale axial photonics (SNAP) microresonators along the 30 micron diameter germanium-doped photosensitive silica optical fiber and demonstrate their permanent trimming and temporary tuning with a CO2 laser and a wire heater. Hydrogen loading allows us to increase the introduced variation of the effective fiber radius by an order of magnitude compared to the unloaded case, i.e., to around 5 nm. It is demonstrated that the CO2 laser annealing of the fabricated microresonator chain can be used to modify the fiber radius variation. Depending on the CO2 laser beam power, the microresonator effective radius variation can be increased in depth up to the factor of two or completely erased. In addition, we demonstrate temporary tuning of a microresonator chain with a wire heater.
我们沿着直径为30微米的掺锗光敏石英光纤引入了多系列非耦合和耦合的表面纳米级轴向光子学（SNAP）微谐振器，并展示了用二氧化碳激光器和线加热器对其进行永久性微调及临时性调谐。与未加载情况相比，氢加载使我们能够将有效光纤半径的引入变化增大一个数量级，即达到约5纳米。结果表明，所制造的微谐振器链的二氧化碳激光退火可用于改变光纤半径变化。根据二氧化碳激光束功率，微谐振器有效半径变化在深度上可增大至两倍或完全消除。此外，我们展示了用线加热器对微谐振器链进行临时性调谐。
