. Author manuscript; available in PMC: 2017 Mar 1.

Published in final edited form as: Lasers Surg Med. 2015 Dec 14;48(3):270–280. doi: 10.1002/lsm.22456

Table 2.

Ablation Thresholds

Delivery Method	Spot Diameter (μm)	Wavelength (μm)	Threshold Energy (mJ)	Threshold Fluence (J/cm²)
Free-space	300 ± 20	6.09	0.13 ± 0.02	0.18 ± 0.04
		6.27	0.24 ± 0.03	0.34 ± 0.06
		6.43	> 0.5	> 0.7
Waveguide	200 ± 20	6.09	0.26 ± 0.03^*	0.8 ± 0.2^*
		6.27	0.48 ± 0.03^*	1.5 ± 0.3^*
		6.43	~0.56^**	~1.6^**

Measured through a 1.5-m long waveguide.

^**

Measured through just an 8-cm length of waveguide.