Spectral measurements of NH(3) absorption lines by a 1.5-microm grating-external-cavity semiconductor laser.
Forty-four NH(3) absorption spectral lines of the combination tones of the vibration-rotation transitions were observed at 1.4988-1.5520 microm with a 1.5-microm grating-external-cavity semiconductor laser. The linewidth and absorption rate of NH(3) absorption spectral lines were measured. Also, the changes of center frequency and linewidth of the NH(3) absorption spectral line with the our knowledge the first time.
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T
Wu
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H
An
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P
Jiang
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Y
Fang
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S
Tao
P
P
Ye