Far-infrared high-resolution Fourier transform spectrometer:
applications to H2O, NH3, and NO2
lines

J. Kachmarsky; C. Belorgeot; A. Pluchino; K. D. Möller

doi:10.1364/AO.15.000708

Applied Optics
Vol. 15,
Issue 3,
pp. 708-713
(1976)
•https://doi.org/10.1364/AO.15.000708

Far-infrared high-resolution Fourier transform spectrometer: applications to H₂O, NH₃, and NO₂ lines

J. Kachmarsky, C. Belorgeot, A. Pluchino, and K. D. Möller

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J. Kachmarsky, C. Belorgeot, A. Pluchino, and K. D. Möller, "Far-infrared high-resolution Fourier transform spectrometer: applications to H₂O, NH₃, and NO₂ lines," Appl. Opt. 15, 708-713 (1976)

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Abstract

A Michelson-type Fourier transform spectrometer has been constructed for high resolution work in the far ir. The instrument has a theoretical resolution of 0.007 cm⁻¹ and can be used with a tunable band pass filter system for the reduction of sampling points in a specific spectral region. Separations of 0.05 cm⁻¹ in the inversion spectrum of NH₃ in the 200-cm⁻¹ spectral region have been observed with about 1000 sampling points and splittings of 0.04 cm⁻¹ in the NO₂ spectrum at about 100 cm⁻¹.

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I(K₋₁, K₊₁)	Ref. 9	Ref. 10	Ref. 11	Ref. 12	Observed this work
4(4, 1)	488.110	488.110	488.093	488.10809
4(3, 2)	382.520	382.495	382.504	382.51703
Line	105.590	105.615	105.589	105.59106	105.587
6(2, 5)	552.960	552.880	552.888	552.91190
6(1,6)	447.302	447.231	447.229	447.25261
Line	105.658	105.649	105.659	105.65929	105.659
Splitting Δ	0.068	0.034	0.070	0.06823	0.072

J_K^a	Calculated Ref. 12	Observed this work	Deviation
9₁L	195.256	195.258	+0.002
9₂L	195.328	195.338	+0.010
9₃L	195.448	195.450	+0.002
9₄L	195.618	195.619	+0.001
9₅L	195.836	195.834	−0.002
9₀H	196.079
9₆L	196.102	196.094
9₁H	196.111
9₂H	196.206	196.206	0
9₃H	196.366	196.376	+0.010
9₇L	196.416	196.421	+0.005
9₄H	196.593	196.590	−0.003
9₈L	196.776	196.772	−0.004
9₅H	196.891	196.895	+0.004
9₉L	197.181	197.178	−0.003
9₆H	197.263	197.268	+0.005
9₇H	197.718	197.720	+0.002
9₈H	198.261	198.261	0
9₉H	198.905	198.894	−0.011

	Observed		Calculated			Transition (N, K₋₁, K₊₁)
^a	Line	Splitting	Line	Splitting	Intensity	from	to
1.	111.398	0.044	111418	0.047	0.214	34 5 29	35 6 30
1.	111.442	0.044	111.465	0.047	0.214	34 5 29	35 6 30
2.	111.872	0.088	111.845	0.093	0.588	18 6 12	19 7 13
2.	111.960	0.088	111.938	0.093	0.588	18 6 12	19 7 13
3.	112.249	0.044	112.270	0.046	0.190	35 5 31	36 6 30
3.	112.293	0.044	112.316	0.046	0.190	35 5 31	36 6 30
4.	112.730	0.081	112701	0.088	0.558	19 6 14	20 7 13
4.	112.811	0.081	112.789	0.088	0.558	19 6 14	20 7 13
5.	113.100	0.044	113.122	0.045	0.167	36 5 31	37 6 32
5.	113.144	0.044	113.167	0.045	0.167	36 5 31	37 6 32
6.	113.581	0.074	113.557	0.085	0.528	20 6 14	21 7 15
6.	113.655	0.074	113.642	0.085	0.528	20 6 14	21 7 15
7.	113.950	0.45
7.	113.995	0.45
8.	114.217
9.	114.432	0.081	114.413	0.082	0.497	21 6 16	22 7 15
9.	114.513	0.081	114.495	0.082	0.497	21 6 16	22 7 15
10.	114.794	0.044	114.826	0.042	0.128	38 5 33	39 6 34
10.	114.838	0.044	114.868	0.042	0.128	38 5 33	39 6 34
11.	115.290	0.074	115.269	0.079	0.466	22 6 16	23 7 17
11.	115.364	0.074	115.348	0.079	0.466	22 6 16	23 7 17
12.	115.644	0044	115.677	0.042	0.112	39 5 35	40 6 34
12.	115.688	0044	115.719	0.042	0.112	39 5 35	40 6 34

I(K₋₁, K₊₁)	Ref. 9	Ref. 10	Ref. 11	Ref. 12	Observed this work
4(4, 1)	488.110	488.110	488.093	488.10809
4(3, 2)	382.520	382.495	382.504	382.51703
Line	105.590	105.615	105.589	105.59106	105.587
6(2, 5)	552.960	552.880	552.888	552.91190
6(1,6)	447.302	447.231	447.229	447.25261
Line	105.658	105.649	105.659	105.65929	105.659
Splitting Δ	0.068	0.034	0.070	0.06823	0.072

J_K^a	Calculated Ref. 12	Observed this work	Deviation
9₁L	195.256	195.258	+0.002
9₂L	195.328	195.338	+0.010
9₃L	195.448	195.450	+0.002
9₄L	195.618	195.619	+0.001
9₅L	195.836	195.834	−0.002
9₀H	196.079
9₆L	196.102	196.094
9₁H	196.111
9₂H	196.206	196.206	0
9₃H	196.366	196.376	+0.010
9₇L	196.416	196.421	+0.005
9₄H	196.593	196.590	−0.003
9₈L	196.776	196.772	−0.004
9₅H	196.891	196.895	+0.004
9₉L	197.181	197.178	−0.003
9₆H	197.263	197.268	+0.005
9₇H	197.718	197.720	+0.002
9₈H	198.261	198.261	0
9₉H	198.905	198.894	−0.011

Abstract

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Applied Optics