Abstract

We report the generation of up to 0.7 mW of narrow-linewidth <60MHz radiation at 3.3 µm by difference frequency mixing of a Nd:YAG-seeded 1.6-W Yb fiber amplifier and a 1.5µm diode-laser-seeded 0.6-W Er/Yb fiber amplifier in periodically poled LiNbO3. A conversion efficiency of 0.09%/W 0.47 mWW-2 cm-1 was achieved. A room-air CH4 spectrum acquired with a compact 80-m multipass cell and a dual-beam spectroscopic configuration indicates an absorption sensitivity of ±2.8×10-5 ±1σ, corresponding to a sub-parts-in- 109 ppb CH4 sensitivity (0.8 ppb).

© 1999 Optical Society of America

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References

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1999 (4)

1998 (2)

1997 (1)

A. Fried, S. Sewell, B. Henry, B. P. Wert, and T. Gilpin, J. Geophys. Res. 102, 6253 (1997).
[Crossref]

1996 (1)

1995 (1)

1992 (1)

Agrawal, G. P.

G. P. Agrawal, Nonlinear Fiber Optics (Academic, San Francisco, Calif., 1989).

Balakrishnan, A.

Benko, Z.

Boller, K. J.

Burns, W. K.

Canarelli, P.

Capasso, F.

F. Capasso, C. Gmachl, D. L. Sivco, and A. Y. Cho, Phys. World 12, 27 (1999).

Cho, A. Y.

F. Capasso, C. Gmachl, D. L. Sivco, and A. Y. Cho, Phys. World 12, 27 (1999).

Curl, R. F.

DeMars, S.

Fried, A.

A. Fried, S. Sewell, B. Henry, B. P. Wert, and T. Gilpin, J. Geophys. Res. 102, 6253 (1997).
[Crossref]

Gilpin, T.

A. Fried, S. Sewell, B. Henry, B. P. Wert, and T. Gilpin, J. Geophys. Res. 102, 6253 (1997).
[Crossref]

Gmachl, C.

F. Capasso, C. Gmachl, D. L. Sivco, and A. Y. Cho, Phys. World 12, 27 (1999).

Goldberg, L.

Grundkötter, W.

Haase, C.

Henry, B.

A. Fried, S. Sewell, B. Henry, B. P. Wert, and T. Gilpin, J. Geophys. Res. 102, 6253 (1997).
[Crossref]

Herrmann, H.

Hofmann, D.

Klein, M. E.

Kliner, D. A. V.

Koplow, J.

Lancaster, D. G.

L. Goldberg, J. Koplow, D. G. Lancaster, R. F. Curl, and F. K. Tittel, Opt. Lett. 23, 1517 (1998).
[Crossref]

D. G. Lancaster, D. Richter, and F. K. Tittel, “Portable fiber coupled diode laser based sensor for multiple trace gas detection,” Appl. Phys. B (to be published).

Lang, R. J.

Lee, D. H.

McElhanon, R. W.

Mehuys, D. G.

Meyn, J. P.

Nam, D. W.

Richter, D.

D. G. Lancaster, D. Richter, and F. K. Tittel, “Portable fiber coupled diode laser based sensor for multiple trace gas detection,” Appl. Phys. B (to be published).

Ricken, R.

Sanders, S.

Schreiber, G.

Sewell, S.

A. Fried, S. Sewell, B. Henry, B. P. Wert, and T. Gilpin, J. Geophys. Res. 102, 6253 (1997).
[Crossref]

Sivco, D. L.

F. Capasso, C. Gmachl, D. L. Sivco, and A. Y. Cho, Phys. World 12, 27 (1999).

Sohler, W.

Tittel, F. K.

L. Goldberg, J. Koplow, D. G. Lancaster, R. F. Curl, and F. K. Tittel, Opt. Lett. 23, 1517 (1998).
[Crossref]

P. Canarelli, Z. Benko, R. F. Curl, and F. K. Tittel, J. Opt. Soc. Am. B 9, 197 (1992).
[Crossref]

D. G. Lancaster, D. Richter, and F. K. Tittel, “Portable fiber coupled diode laser based sensor for multiple trace gas detection,” Appl. Phys. B (to be published).

Waarts, R. G.

Wallenstein, R.

Webjorn, J.

Welch, D. F.

Werle, P.

P. Werle, Spectrochim. Acta A 54, 197 (1998).
[Crossref]

Wert, B. P.

A. Fried, S. Sewell, B. Henry, B. P. Wert, and T. Gilpin, J. Geophys. Res. 102, 6253 (1997).
[Crossref]

J. Geophys. Res. (1)

A. Fried, S. Sewell, B. Henry, B. P. Wert, and T. Gilpin, J. Geophys. Res. 102, 6253 (1997).
[Crossref]

J. Opt. Soc. Am. B (1)

Opt. Lett. (6)

Phys. World (1)

F. Capasso, C. Gmachl, D. L. Sivco, and A. Y. Cho, Phys. World 12, 27 (1999).

Spectrochim. Acta A (1)

P. Werle, Spectrochim. Acta A 54, 197 (1998).
[Crossref]

Other (2)

G. P. Agrawal, Nonlinear Fiber Optics (Academic, San Francisco, Calif., 1989).

D. G. Lancaster, D. Richter, and F. K. Tittel, “Portable fiber coupled diode laser based sensor for multiple trace gas detection,” Appl. Phys. B (to be published).

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Figures (4)

Fig. 1
Fig. 1

Schematic of the experimental DFG configuration: DFB, distributed feedback; OI’s, optoisolators; PD, photodiode; NPRO, nonplanar ring oscillator.

Fig. 2
Fig. 2

Measured conversion efficiency of 0.89 mW W-2 0.47 mW W-2 cm-1 for a 19-mm-long PPLN crystal pumped by two fiber-amplified channels at 1064 and 1560 nm.

Fig. 3
Fig. 3

Doppler-broadened spectra of 0.4 Torr of CH4 in a 3-cm cell. This measurement was taken over 100 averages at a 0.1-kHz wavelength scan rate and demonstrates a sensor linewidth of <60 MHz.

Fig. 4
Fig. 4

Room-air spectrum of the CH4 P3 ν3 rovibrational lines at P=88 Torr and two H2O lines. The inset is a low-pressure CH4 spectrum in the same spectral region (87 ppb of CH4 in nitrogen).

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