Abstract

We propose a novel quasi-phase-matched (QPM) device that can generate unequally spaced multiple wavelengths. Unequally spaced multiple QPM peaks can be obtained by employing the optimized phase modulation of a periodic domain structure. We fabricated a LiNbO3 waveguide device for 3.23.4μm band difference frequency generation based on the design. Using the multiple mid-infrared outputs, we demonstrate the detection of multiple hydrocarbon gases, namely, methane, ethylene, and ethane.

© 2007 Optical Society of America

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References

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    [CrossRef]
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2007 (1)

O. Tadanaga, Y. Nishida, T. Yanagawa, K. Magari, T. Umeki, M. Asobe, and H. Suzuki, Proc. SPIE 6455, 64550D (2007).
[CrossRef]

2006 (2)

O. Tadanaga, T. Yanagawa, Y. Nishida, H. Miyazawa, K. Magari, M. Asobe, and H. Suzuki, Jpn. J. Appl. Phys. Part 2 45, L239 (2006).
[CrossRef]

O. Tadanaga, T. Yanagawa, Y. Nishida, H. Miyazawa, K. Magari, M. Asobe, and H. Suzuki, Appl. Phys. Lett. 88, 061101 (2006).
[CrossRef]

2005 (1)

M. Asobe, O. Tadanaga, H. Miyazawa, Y. Nishida, and H. Suzuki, IEEE J. Quantum Electron. 41, 1540 (2005).
[CrossRef]

2002 (1)

1999 (2)

Appl. Phys. Lett. (1)

O. Tadanaga, T. Yanagawa, Y. Nishida, H. Miyazawa, K. Magari, M. Asobe, and H. Suzuki, Appl. Phys. Lett. 88, 061101 (2006).
[CrossRef]

IEEE J. Quantum Electron. (1)

M. Asobe, O. Tadanaga, H. Miyazawa, Y. Nishida, and H. Suzuki, IEEE J. Quantum Electron. 41, 1540 (2005).
[CrossRef]

Jpn. J. Appl. Phys. Part 2 (1)

O. Tadanaga, T. Yanagawa, Y. Nishida, H. Miyazawa, K. Magari, M. Asobe, and H. Suzuki, Jpn. J. Appl. Phys. Part 2 45, L239 (2006).
[CrossRef]

Opt. Lett. (3)

Proc. SPIE (1)

O. Tadanaga, Y. Nishida, T. Yanagawa, K. Magari, T. Umeki, M. Asobe, and H. Suzuki, Proc. SPIE 6455, 64550D (2007).
[CrossRef]

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Figures (4)

Fig. 1
Fig. 1

(a), (c) Optimized phase-modulation functions and (b), (d) corresponding phase-matching curves.

Fig. 2
Fig. 2

DFG efficiency as a function of signal wavelength.

Fig. 3
Fig. 3

Individual absorption spectra of three hydrocarbon gases measured using three QPM peaks.

Fig. 4
Fig. 4

Absorption spectra of three hydrocarbon gases measured simultaneously.

Equations (2)

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Δ β = 2 π ( 1 Λ 0 + i Λ ph ) ,
T = i = m i = n [ η ( i ) η t ( i ) ] 2 ,

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