Abstract

We report a unique all fiber-based single-frequency Q-switched laser in a monolithic master oscillator power amplifier configuration at 1920nm by using highly Tm-doped germanate fibers for the first time. The actively Q-switched fiber laser seed was achieved by using a piezo to press the fiber in the fiber Bragg grating cavity and modulate the fiber birefringence, enabling Q-switching with pulse width and repetition rate tunability. A single-mode polarization maintaining large core 25μm highly Tm-doped germanate fiber was used in the power amplifier stage. For 80ns pulses with 20kHz repetition rate, we achieved 220μJ pulse energy, which corresponds to a peak power of 2.75kW with transform-limited linewidth.

© 2011 Optical Society of America

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2010 (1)

2009 (3)

2007 (3)

2006 (1)

2005 (2)

P. Pérez-Millán, J. L. Cruz, and M. V. Andrés, Appl. Phys. Lett. 87, 011104 (2005).
[CrossRef]

M. Eichhorn, Opt. Lett. 30, 3329 (2005).
[CrossRef]

2002 (1)

N. Russo, R. Duchowicz, J. Mora, J. Cruz, and M. Andres, Opt. Commun. 210, 361 (2002).
[CrossRef]

2000 (1)

1999 (1)

Alvarez-Chavez, A.

Amzajerdian, F.

Andres, M.

N. Russo, R. Duchowicz, J. Mora, J. Cruz, and M. Andres, Opt. Commun. 210, 361 (2002).
[CrossRef]

Andrés, M. V.

P. Pérez-Millán, J. L. Cruz, and M. V. Andrés, Appl. Phys. Lett. 87, 011104 (2005).
[CrossRef]

Chavez-Pirson, A.

Clarkson, W. A.

Cruz, J.

N. Russo, R. Duchowicz, J. Mora, J. Cruz, and M. Andres, Opt. Commun. 210, 361 (2002).
[CrossRef]

Cruz, J. L.

P. Pérez-Millán, J. L. Cruz, and M. V. Andrés, Appl. Phys. Lett. 87, 011104 (2005).
[CrossRef]

Duchowicz, R.

N. Russo, R. Duchowicz, J. Mora, J. Cruz, and M. Andres, Opt. Commun. 210, 361 (2002).
[CrossRef]

Eichhorn, M.

Geng, J.

Gini, E.

Häring, R.

Jackson, S. D.

Jiang, S.

Keller, U.

Leigh, M.

Luo, T.

Melchior, H.

Mora, J.

N. Russo, R. Duchowicz, J. Mora, J. Cruz, and M. Andres, Opt. Commun. 210, 361 (2002).
[CrossRef]

Nguyen, D.

W. Shi, M. Leigh, J. Zong, Z. Yao, D. Nguyen, A. Chavez-Pirson, and N. Peyghambarian, IEEE J. Sel. Top. Quantum Electron. 15, 377 (2009).
[CrossRef]

Nguyen, D. T.

Nilsson, J.

Offerhaus, H. L.

Paschotta, R.

Pérez-Millán, P.

P. Pérez-Millán, J. L. Cruz, and M. V. Andrés, Appl. Phys. Lett. 87, 011104 (2005).
[CrossRef]

Petersen, E.

Peyghambarian, N.

Richardson, D. J.

Russo, N.

N. Russo, R. Duchowicz, J. Mora, J. Cruz, and M. Andres, Opt. Commun. 210, 361 (2002).
[CrossRef]

Shi, W.

Stephen, M. A.

Turner, P. W.

Wang, Q.

Yao, Z.

Zhao, Y.

Zong, J.

Appl. Phys. Lett. (1)

P. Pérez-Millán, J. L. Cruz, and M. V. Andrés, Appl. Phys. Lett. 87, 011104 (2005).
[CrossRef]

IEEE J. Sel. Top. Quantum Electron. (1)

W. Shi, M. Leigh, J. Zong, Z. Yao, D. Nguyen, A. Chavez-Pirson, and N. Peyghambarian, IEEE J. Sel. Top. Quantum Electron. 15, 377 (2009).
[CrossRef]

Opt. Commun. (1)

N. Russo, R. Duchowicz, J. Mora, J. Cruz, and M. Andres, Opt. Commun. 210, 361 (2002).
[CrossRef]

Opt. Express (1)

Opt. Lett. (9)

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Figures (5)

Fig. 1
Fig. 1

Schematic of monolithic single- frequency Q-switched fiber laser at 1920 nm in MOPA configuration. HR, high reflectivity grating; OC, output coupler grating; TGF, highly Tm-doped germanate fiber.

Fig. 2
Fig. 2

Measured pulse width tunability of Q-switched fiber laser at different pump power and repetition rates.

Fig. 3
Fig. 3

Spectrum and typical pulse shapes of single-frequency Q-switched fiber laser seed.

Fig. 4
Fig. 4

(a) Average power and pulse width, and (b) peak power and pulse energy at different repetition rates when the pump power is 300 mW for the Q-switched fiber laser seed.

Fig. 5
Fig. 5

Output pulse energy for the power amplifier stage at different pump level. Insets: cross section of the new germanate fiber 25 / 250 , beam profile image, and the pulse shape.

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