Table 1.

Comparison of detection sensitivity performance with previous PAS publications.

Species	Wavelength (μm)	Power (mW)	Integration time	MDL	NNEA coefficient (cm−1 W Hz−1/2)	Ref.
CO CH4 C2H2	1.567 1.617 1.534	< 1 mW < 1 mW < 1 mW	2.6 s	249.6 ppm 293.7 ppm 1.5 ppm	3.4 × 10−9 1.4 × 10−9 3.6 × 10−9	[18]
CO CH4 C2H2	4.69 3.22 1.533	∼15 [W] (broadband) ∼15 [W] (broadband) 15 mW	1 s	40 ppb 150 ppb 200 ppb	\	[21]
CO CH4 C2H2	1.568 1.529 1.532	1000 (amplified by EDFA) 1000 (amplified by EDFA) 1000 (amplified by EDFA)	1 s	4.6 ppm 87 ppm 1.3 ppb	\	[23]
H2O C2H2	1.368 1.529	21.2 10	300 ms	49 ppm 11 ppm	9.12 × 10−7 1.51 × 10−7	[28]
H2O CH4 N2O	1.392 7.707 7.71	6.2 128 128	100 ms	20 ppm 18 ppb 5 ppb	\	[29]
H2O CH4 CO2	1.396 1.653 1.574	7 2.1 4	181 s 195 s 136 s	1.17 ppm 1.76 ppm 83 ppm	6.03 × 10−10 2.36 × 10−9 5.46 × 10−10	[30]
CO CH4 C2H2	4.59 3.37 1.52	44 8 32	1 s	89 ppb 80 ppb 664 ppb	5.3 × 10−7 1.9 × 10−8 4.2 × 10−8	This paper