High sensitivity detection of low-pressure ammonia by light absorption spectroscopy

• Continuous wave (cw) operated QC-DFB lasers ? = 8.5 ?m

• Very narrow laser line: << 1 MHz

• Wide wavelength tuning range

• QC laser detects absorption changes as small as 0.0003 % due to traces of ammonia

collaboration with:

Pacific Northwest National Lab. USA

calculated

NH3 data

Wavelength (?m)

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