[1] [1] D. Sangla, F. Balembois, and P. Georges, Opt. Express 17, 10091 (2009).

[2] [2] C. Bauer, P. Geiser, J. Burgmeier, G. Holl, and W. Schade, App. Phys. B 85, 251 (2006).

[3] [3] D. P. Hand and J. D. C. Jones, Appl. Opt. 37, 1602 (1998).

[4] [4] H. Jelinkova, J. Sulc, P. Cerny, Y.-W. Shi, Y. Matsuura, and M. Miyagi, Opt. lett. 24, 957 (1999).

[5] [5] M. R. McCurdy, Y. Bakhirkin, G. Wysocki, R. Lewicki, and F. K. Tittel, J. Breath Res. 1, 014001 (2007).

[6] [6] C. Bohling, D. Scheel, K. Hohmann, W. Schade, M. Reuter, and G. Holl, Appl. Opt. 45, 3817 (2006).

[7] [7] A. Ngai, S. Persijn, G. Von Basum, and F. Harren, App. Phys. B 85, 173 (2006).

[8] [8] D. Dragoman and M. Dragoman, Prog. Quantum Electron. 28, 1 (2004).

[9] [9] T. Taniuchi, S. Ikeda, S. Okada, and H. Nakanishi, Jpn. J. Appl. Phys. 44, L652 (2005).

[10] [10] D. M. Mittelmann, R. H. Jacobsen, and M. C. Nuss, IEEE J. Sel. Top. Quantum Electron. 2, 679 (1996).

[11] [11] J. F. Lepage and N. McCarthy, Appl. Opt. 37, 8420 (1998).

[12] [12] V. Zambon, M. Piche, and N. McCarthy, Opt. Commun. 264, 180 (2006).

[13] [13] G. Baili, L. Morvan, M. Alouini, D. Dolfi, F. Bretenaker, I. Sagnes, and A. Garnache, Opt. Lett. 34, 3421 (2009).

[14] [14] A. Khorsandi, U. Willer, P. Geiser, and W. Schade, App. Phys. B 77, 509 (2003).

[15] [15] P.-X. Li, D.-H. Li, C.-Y. Li, and Z.-G. Zhang, Chin. Phys. 13, 1689 (2004).

[16] [16] J. Marling, IEEE J. Quantum Electron. QE-14, 56 (1978).

[17] [17] T. Raymond and A. Smith, IEEE J. Quantum Electron. 31, 1734 (1995).

[18] [18] D. K. Ko, G. Lim, S. H. Kim, B. H. Cha, and J. Lee, Opt. Lett. 20, 710 (1995).

[19] [19] W. Koechner, Solid-State Laser Engineering (6th rev. and updated ed.) (Springer, New York, 2006).

[20] [20] M. Luhrmann, C. Theobald, R. Wallenstein, and J. A. L’huillier, Opt. Express 17, 6177 (2009).

[21] [21] C. Ye, Tunable External Cavity Diode Lasers (World Scientific, Hackensack, 2004).