Abstract

The unblended ozone line at 1044.533 cm-1 was acquired by using the frequency modulation technique. A tunable CO2 sideband laser with a GaAs waveguide modulator with a tuning bandwidth of 20 GHz in the mid-infrared region was used for this method. With this technique, a second sideband at 1-MHz frequency with a peak-to-peak amplitude of 1 V was imposed on the first tunable sideband. The signal was passed through a 1-m cell and collected with an EG&G detector. The signal-to-noise ratio obtained was approximately 100:1.

© 1998 Optical Society of America

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References

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    [CrossRef] [PubMed]
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    [CrossRef]
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    [CrossRef] [PubMed]
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    [CrossRef]
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    [CrossRef]
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1994

Z. Chu, L. Chen, P. K. Cheo, “Absorption spectra of NH3 using a microwave sideband CO2 laser spectrometer,” J. Quant. Spectrosc. Radiat. Transfer 51, 591–602 (1994).
[CrossRef]

P. K. Cheo, “Electro-optic waveguide modulators for frequency tuning of infrared lasers,” J. Quant. Spectrosc. Radiat. Transfer 51, 579–590 (1994).
[CrossRef]

1990

1985

1982

1980

Bjorklund, G. C.

Carlisle, C. B.

Chen, L.

Z. Chu, L. Chen, P. K. Cheo, “Absorption spectra of NH3 using a microwave sideband CO2 laser spectrometer,” J. Quant. Spectrosc. Radiat. Transfer 51, 591–602 (1994).
[CrossRef]

Cheo, P. K.

Z. Chu, L. Chen, P. K. Cheo, “Absorption spectra of NH3 using a microwave sideband CO2 laser spectrometer,” J. Quant. Spectrosc. Radiat. Transfer 51, 591–602 (1994).
[CrossRef]

P. K. Cheo, “Electro-optic waveguide modulators for frequency tuning of infrared lasers,” J. Quant. Spectrosc. Radiat. Transfer 51, 579–590 (1994).
[CrossRef]

K. Shahnazi, L. Lynds, P. K. Cheo, “Use of electro-optical modulator for molecular detection: ozone,” in Digest of LEOS (IEEE, New York, 1996).

Chu, Z.

Z. Chu, L. Chen, P. K. Cheo, “Absorption spectra of NH3 using a microwave sideband CO2 laser spectrometer,” J. Quant. Spectrosc. Radiat. Transfer 51, 591–602 (1994).
[CrossRef]

Cooper, D. E.

Gallagher, T. F.

Gounand, E.

Kachru, R.

Killinger, D.

D. Killinger, W. Wilcox, “USF Hitran-PC,” in Hitran Molecular Data Base (Ontar Corp., Tampa, Fla., 1992), Vol. 2.

Lenth, W.

Lynds, L.

K. Shahnazi, L. Lynds, P. K. Cheo, “Use of electro-optical modulator for molecular detection: ozone,” in Digest of LEOS (IEEE, New York, 1996).

Shahnazi, K.

K. Shahnazi, L. Lynds, P. K. Cheo, “Use of electro-optical modulator for molecular detection: ozone,” in Digest of LEOS (IEEE, New York, 1996).

Wilcox, W.

D. Killinger, W. Wilcox, “USF Hitran-PC,” in Hitran Molecular Data Base (Ontar Corp., Tampa, Fla., 1992), Vol. 2.

Appl. Opt.

J. Opt. Soc. Am. B

J. Quant. Spectrosc. Radiat. Transfer

Z. Chu, L. Chen, P. K. Cheo, “Absorption spectra of NH3 using a microwave sideband CO2 laser spectrometer,” J. Quant. Spectrosc. Radiat. Transfer 51, 591–602 (1994).
[CrossRef]

P. K. Cheo, “Electro-optic waveguide modulators for frequency tuning of infrared lasers,” J. Quant. Spectrosc. Radiat. Transfer 51, 579–590 (1994).
[CrossRef]

Opt. Lett.

Other

K. Shahnazi, L. Lynds, P. K. Cheo, “Use of electro-optical modulator for molecular detection: ozone,” in Digest of LEOS (IEEE, New York, 1996).

D. Killinger, W. Wilcox, “USF Hitran-PC,” in Hitran Molecular Data Base (Ontar Corp., Tampa, Fla., 1992), Vol. 2.

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Figures (4)

Fig. 1
Fig. 1

Experimental setup of the frequency modulation technique: TWTA, traveling-wave tube amplifier.

Fig. 2
Fig. 2

Tunable carrier and its sidebands at the 1-MHz modulation level.

Fig. 3
Fig. 3

Tuning of the sideband into an absorption feature.

Fig. 4
Fig. 4

Ozone line located at 14.64 GHz away from the 9P22 transition line of the CO2 carrier.

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