Abstract

We demonstrate two different schemes for the spectral narrowing of a 12 emitter 980 nm gain guided tapered diode laser bar. In the first scheme, a reflective grating has been used in a Littman Metcalf configuration and the wavelength of the laser emission could be narrowed down from more than 5.5 nm in the free running mode to 0.04 nm (FWHM) at an operating current of 30 A with an output power of 8 W. The spectrum was found to be tunable within a range of 16 nm. In the second scheme, a volume Bragg grating has been used to narrow the wavelength of the laser bar from over 5 nm to less than 0.2 nm with an output of 5 W at 20 A. To our knowledge, this is the first time spectral narrowing has been performed on a gain guided tapered diode laser bar. In the Littman Metcalf configuration, the spectral brightness has been increased by 86 times and in the volume Bragg grating cavity the spectral brightness has been improved over 18 times when compared to the free running operation. These schemes could be also extended for other wavelengths of interest in the future.

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  16. www.powerphotonic.co.uk

2010 (2)

2008 (3)

2007 (1)

B. V. Zhdanov, T. Ehrenreich, and R. J. Knize, “Narrowband external cavity laser diode array,” Electron. Lett. 43(4), 221–222 (2007).
[Crossref]

2006 (3)

2005 (2)

2000 (2)

B. Chann, I. Nelson, and T. G. Walker, “Frequency-narrowed external-cavity diode-laser-array bar,” Opt. Lett. 25(18), 1352–1354 (2000).
[Crossref]

I. A. Nelson, B. Chann, and T. G. Walker, “Spin-exchange optical pumping using a frequency-narrowed high power diode laser,” Appl. Phys. Lett. 76(11), 1356–1358 (2000).
[Crossref]

1997 (1)

T. G. Walker and W. Happer, “Spin-exchange optical pumping of noble-gas nuclei,” Rev. Mod. Phys. 69(2), 629–642 (1997).
[Crossref]

Babcock, E.

Baker, H. J.

Braiman, Y.

Brasseur, J. K.

Brereton, I.

Chann, B.

Ehrenreich, T.

B. V. Zhdanov, T. Ehrenreich, and R. J. Knize, “Narrowband external cavity laser diode array,” Electron. Lett. 43(4), 221–222 (2007).
[Crossref]

Fan, T. Y.

Friese, M. E.

Georges, P.

D. Paboeuf, G. Lucas-Leclin, P. Georges, N. Michel, M. Krakowski, J. Lim, S. Sujecki, and E. Larkins, “Narrow-line coherently combined tapered laser diodes in a Talbot external cavity with a volume Bragg grating,” Appl. Phys. Lett. 93(21), 211102 (2008).
[Crossref]

Glebov, L.

Glebov, L. B.

Gopinath, J. T.

Gourevitch, A.

Hall, D. R.

Happer, W.

T. G. Walker and W. Happer, “Spin-exchange optical pumping of noble-gas nuclei,” Rev. Mod. Phys. 69(2), 629–642 (1997).
[Crossref]

Heckenberg, N. R.

Henshaw, T.

Hostutler, D. A.

Jensen, O. B.

Knize, R. J.

B. V. Zhdanov, T. Ehrenreich, and R. J. Knize, “Narrowband external cavity laser diode array,” Electron. Lett. 43(4), 221–222 (2007).
[Crossref]

Krakowski, M.

D. Paboeuf, G. Lucas-Leclin, P. Georges, N. Michel, M. Krakowski, J. Lim, S. Sujecki, and E. Larkins, “Narrow-line coherently combined tapered laser diodes in a Talbot external cavity with a volume Bragg grating,” Appl. Phys. Lett. 93(21), 211102 (2008).
[Crossref]

Larkins, E.

D. Paboeuf, G. Lucas-Leclin, P. Georges, N. Michel, M. Krakowski, J. Lim, S. Sujecki, and E. Larkins, “Narrow-line coherently combined tapered laser diodes in a Talbot external cavity with a volume Bragg grating,” Appl. Phys. Lett. 93(21), 211102 (2008).
[Crossref]

Lim, J.

D. Paboeuf, G. Lucas-Leclin, P. Georges, N. Michel, M. Krakowski, J. Lim, S. Sujecki, and E. Larkins, “Narrow-line coherently combined tapered laser diodes in a Talbot external cavity with a volume Bragg grating,” Appl. Phys. Lett. 93(21), 211102 (2008).
[Crossref]

Liu, B.

Liu, Y.

Lucas-Leclin, G.

D. Paboeuf, G. Lucas-Leclin, P. Georges, N. Michel, M. Krakowski, J. Lim, S. Sujecki, and E. Larkins, “Narrow-line coherently combined tapered laser diodes in a Talbot external cavity with a volume Bragg grating,” Appl. Phys. Lett. 93(21), 211102 (2008).
[Crossref]

Madasamy, P.

Meng, L. S.

Michel, N.

D. Paboeuf, G. Lucas-Leclin, P. Georges, N. Michel, M. Krakowski, J. Lim, S. Sujecki, and E. Larkins, “Narrow-line coherently combined tapered laser diodes in a Talbot external cavity with a volume Bragg grating,” Appl. Phys. Lett. 93(21), 211102 (2008).
[Crossref]

Monjardin, J. F.

Nelson, I.

Nelson, I. A.

E. Babcock, B. Chann, I. A. Nelson, and T. G. Walker, “Frequency-narrowed diode array bar,” Appl. Opt. 44(15), 3098–3104 (2005).
[Crossref] [PubMed]

I. A. Nelson, B. Chann, and T. G. Walker, “Spin-exchange optical pumping using a frequency-narrowed high power diode laser,” Appl. Phys. Lett. 76(11), 1356–1358 (2000).
[Crossref]

Neumann, D. K.

Nizamov, B.

Nowak, K. M.

Ostendorf, R.

Paboeuf, D.

D. Paboeuf, G. Lucas-Leclin, P. Georges, N. Michel, M. Krakowski, J. Lim, S. Sujecki, and E. Larkins, “Narrow-line coherently combined tapered laser diodes in a Talbot external cavity with a volume Bragg grating,” Appl. Phys. Lett. 93(21), 211102 (2008).
[Crossref]

Rubinsztein-Dunlop, H.

Sanchez-Rubio, A.

Sevian, A.

Smirnov, V.

Smirnov, V. I.

Sujecki, S.

D. Paboeuf, G. Lucas-Leclin, P. Georges, N. Michel, M. Krakowski, J. Lim, S. Sujecki, and E. Larkins, “Narrow-line coherently combined tapered laser diodes in a Talbot external cavity with a volume Bragg grating,” Appl. Phys. Lett. 93(21), 211102 (2008).
[Crossref]

Talbot, C. L.

Thestrup, B.

Venus, G.

Venus, G. B.

Vijayakumar, D.

Walker, T. G.

E. Babcock, B. Chann, I. A. Nelson, and T. G. Walker, “Frequency-narrowed diode array bar,” Appl. Opt. 44(15), 3098–3104 (2005).
[Crossref] [PubMed]

I. A. Nelson, B. Chann, and T. G. Walker, “Spin-exchange optical pumping using a frequency-narrowed high power diode laser,” Appl. Phys. Lett. 76(11), 1356–1358 (2000).
[Crossref]

B. Chann, I. Nelson, and T. G. Walker, “Frequency-narrowed external-cavity diode-laser-array bar,” Opt. Lett. 25(18), 1352–1354 (2000).
[Crossref]

T. G. Walker and W. Happer, “Spin-exchange optical pumping of noble-gas nuclei,” Rev. Mod. Phys. 69(2), 629–642 (1997).
[Crossref]

Wang, D.

Westphalen, T.

Zhdanov, B. V.

B. V. Zhdanov, T. Ehrenreich, and R. J. Knize, “Narrowband external cavity laser diode array,” Electron. Lett. 43(4), 221–222 (2007).
[Crossref]

Appl. Opt. (2)

Appl. Phys. Lett. (2)

D. Paboeuf, G. Lucas-Leclin, P. Georges, N. Michel, M. Krakowski, J. Lim, S. Sujecki, and E. Larkins, “Narrow-line coherently combined tapered laser diodes in a Talbot external cavity with a volume Bragg grating,” Appl. Phys. Lett. 93(21), 211102 (2008).
[Crossref]

I. A. Nelson, B. Chann, and T. G. Walker, “Spin-exchange optical pumping using a frequency-narrowed high power diode laser,” Appl. Phys. Lett. 76(11), 1356–1358 (2000).
[Crossref]

Electron. Lett. (1)

B. V. Zhdanov, T. Ehrenreich, and R. J. Knize, “Narrowband external cavity laser diode array,” Electron. Lett. 43(4), 221–222 (2007).
[Crossref]

Opt. Express (5)

Opt. Lett. (3)

Rev. Mod. Phys. (1)

T. G. Walker and W. Happer, “Spin-exchange optical pumping of noble-gas nuclei,” Rev. Mod. Phys. 69(2), 629–642 (1997).
[Crossref]

Other (2)

C. Scholz, K. Boucke, R. Poprawe, M. T. Kelemen, J. Weber, M. Mikulla, and G. Weimann, “Comparison between 50 W tapered laser arrays and tapered single emitters,” Proc. of SPIE Vol. 6104, 61040G1–8 (2006).

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Figures (7)

Fig. 1
Fig. 1

Near field image of the laser bar at 10 A (a) Without wave front correction optics. (b) With wave front correction optics.

Fig. 2
Fig. 2

Schematic diagram of the experimental setup of the Littman Metcalf configuration for spectral narrowing of the tapered diode laser bar.

Fig. 3
Fig. 3

The schematic diagram of the external cavity setup based on the volume Bragg grating.

Fig. 4
Fig. 4

The light current characteristics of the laser bar operated in the free running mode and in the external cavities.

Fig. 5
Fig. 5

The free running spectrum of the laser bar at I= 30A and the laser operating at 20°C.

Fig. 6
Fig. 6

The spectral tuning of the external cavity tapered diode laser bar at I= 30A and the laser operating at 20°C.

Fig. 7
Fig. 7

Comparison of the spectrum from a Litmann Metcalf and a VBG cavity.

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