1. What are the contributions in "Efficient, low-threshold synchronously-pumped parametric oscillation in periodically-poled lithium niobate over the 1.3μm to 5.3μm range" ?
Here the authors report the results of making absorption coefficient at the idler wavelength ( ~3cm at 5. 3μm ).. The results reported here made use of these crystals, but pumped by a different laser having 4ps pulses.
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![Fig. 1. Calculated tuning curve for a PPLN based OPO pumped at 1047nm [2]. Circles - experimentally determined tuning curve.](/figures/fig-1-calculated-tuning-curve-for-a-ppln-based-opo-pumped-at-n7g6yvz8.png)