Abstract

We report on a diode-pumped master-oscillator/fiber-amplifier (MOFA) system consisting of a passively Q-switched, single-frequency Nd:LSB microchip laser that seeds a dual-stage Yb-doped fiber amplifier. A large-core, single-mode photonic crystal fiber was used for the final amplifier. The MOFA generated 1062nm wavelength, 1-ns long, ~10kHz repetition-rate, diffraction-limited pulses of energy >1mJ, peak power >1MW, average power >10W, and spectral linewidth ~9 GHz.

©2005 Optical Society of America

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References

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  1. G. P. Agrawal , Nonlinear Fiber Optics, Third Edition ( Academic, San Diego, Calif. , 2001 ).
  2. F. Di Teodoro and C. D. Brooks , “ 1.1-MW peak-power, 7-W average-power, high-spectral-brightness, diffraction-limited pulses from a photonic crystal fiber amplifier ,” Opt. Lett. , in press.
    [PubMed]
  3. A. E. Siegman , Lasers ( University Science Books, Sausalito, Calif. , 1986 ). See Ch. 10.2, pp. 384 – 386 .
  4. W. Torruellas , Y. Chen , B. McIntosh , J. Chen , J. Farroni , K. Tankala , S. Webster , D. Hagan , and M. J. Soileau , “ High peak power Ytterbium doped fiber amplifiers ,” Tech. Digest Solid State and Diode Laser Technology Review (SSDLTR), Los Angeles, USA, June 7–9, 2005 , Fiber-7.
  5. M.-Y. Cheng , Y.-C. Chang , A. Galvanauskas , P. Mamidipudi , R. Changkakoti , and P. Gatchell , “ High-energy and high-peak-power nanosecond pulse generation with beam quality control in 200-μm core highly multimode Yb-doped fiber amplifiers ,” Opt. Lett.   30 , 358 ( 2005 ).
    [Crossref] [PubMed]

2005 (1)

Agrawal, G. P.

G. P. Agrawal , Nonlinear Fiber Optics, Third Edition ( Academic, San Diego, Calif. , 2001 ).

Brooks, C. D.

F. Di Teodoro and C. D. Brooks , “ 1.1-MW peak-power, 7-W average-power, high-spectral-brightness, diffraction-limited pulses from a photonic crystal fiber amplifier ,” Opt. Lett. , in press.
[PubMed]

Chang, Y.-C.

Changkakoti, R.

Chen, J.

W. Torruellas , Y. Chen , B. McIntosh , J. Chen , J. Farroni , K. Tankala , S. Webster , D. Hagan , and M. J. Soileau , “ High peak power Ytterbium doped fiber amplifiers ,” Tech. Digest Solid State and Diode Laser Technology Review (SSDLTR), Los Angeles, USA, June 7–9, 2005 , Fiber-7.

Chen, Y.

W. Torruellas , Y. Chen , B. McIntosh , J. Chen , J. Farroni , K. Tankala , S. Webster , D. Hagan , and M. J. Soileau , “ High peak power Ytterbium doped fiber amplifiers ,” Tech. Digest Solid State and Diode Laser Technology Review (SSDLTR), Los Angeles, USA, June 7–9, 2005 , Fiber-7.

Cheng, M.-Y.

Farroni, J.

W. Torruellas , Y. Chen , B. McIntosh , J. Chen , J. Farroni , K. Tankala , S. Webster , D. Hagan , and M. J. Soileau , “ High peak power Ytterbium doped fiber amplifiers ,” Tech. Digest Solid State and Diode Laser Technology Review (SSDLTR), Los Angeles, USA, June 7–9, 2005 , Fiber-7.

Galvanauskas, A.

Gatchell, P.

Hagan, D.

W. Torruellas , Y. Chen , B. McIntosh , J. Chen , J. Farroni , K. Tankala , S. Webster , D. Hagan , and M. J. Soileau , “ High peak power Ytterbium doped fiber amplifiers ,” Tech. Digest Solid State and Diode Laser Technology Review (SSDLTR), Los Angeles, USA, June 7–9, 2005 , Fiber-7.

Mamidipudi, P.

McIntosh, B.

W. Torruellas , Y. Chen , B. McIntosh , J. Chen , J. Farroni , K. Tankala , S. Webster , D. Hagan , and M. J. Soileau , “ High peak power Ytterbium doped fiber amplifiers ,” Tech. Digest Solid State and Diode Laser Technology Review (SSDLTR), Los Angeles, USA, June 7–9, 2005 , Fiber-7.

Siegman, A. E.

A. E. Siegman , Lasers ( University Science Books, Sausalito, Calif. , 1986 ). See Ch. 10.2, pp. 384 – 386 .

Soileau, M. J.

W. Torruellas , Y. Chen , B. McIntosh , J. Chen , J. Farroni , K. Tankala , S. Webster , D. Hagan , and M. J. Soileau , “ High peak power Ytterbium doped fiber amplifiers ,” Tech. Digest Solid State and Diode Laser Technology Review (SSDLTR), Los Angeles, USA, June 7–9, 2005 , Fiber-7.

Tankala, K.

W. Torruellas , Y. Chen , B. McIntosh , J. Chen , J. Farroni , K. Tankala , S. Webster , D. Hagan , and M. J. Soileau , “ High peak power Ytterbium doped fiber amplifiers ,” Tech. Digest Solid State and Diode Laser Technology Review (SSDLTR), Los Angeles, USA, June 7–9, 2005 , Fiber-7.

Teodoro, F. Di

F. Di Teodoro and C. D. Brooks , “ 1.1-MW peak-power, 7-W average-power, high-spectral-brightness, diffraction-limited pulses from a photonic crystal fiber amplifier ,” Opt. Lett. , in press.
[PubMed]

Torruellas, W.

W. Torruellas , Y. Chen , B. McIntosh , J. Chen , J. Farroni , K. Tankala , S. Webster , D. Hagan , and M. J. Soileau , “ High peak power Ytterbium doped fiber amplifiers ,” Tech. Digest Solid State and Diode Laser Technology Review (SSDLTR), Los Angeles, USA, June 7–9, 2005 , Fiber-7.

Webster, S.

W. Torruellas , Y. Chen , B. McIntosh , J. Chen , J. Farroni , K. Tankala , S. Webster , D. Hagan , and M. J. Soileau , “ High peak power Ytterbium doped fiber amplifiers ,” Tech. Digest Solid State and Diode Laser Technology Review (SSDLTR), Los Angeles, USA, June 7–9, 2005 , Fiber-7.

Opt. Lett. (1)

Other (4)

G. P. Agrawal , Nonlinear Fiber Optics, Third Edition ( Academic, San Diego, Calif. , 2001 ).

F. Di Teodoro and C. D. Brooks , “ 1.1-MW peak-power, 7-W average-power, high-spectral-brightness, diffraction-limited pulses from a photonic crystal fiber amplifier ,” Opt. Lett. , in press.
[PubMed]

A. E. Siegman , Lasers ( University Science Books, Sausalito, Calif. , 1986 ). See Ch. 10.2, pp. 384 – 386 .

W. Torruellas , Y. Chen , B. McIntosh , J. Chen , J. Farroni , K. Tankala , S. Webster , D. Hagan , and M. J. Soileau , “ High peak power Ytterbium doped fiber amplifiers ,” Tech. Digest Solid State and Diode Laser Technology Review (SSDLTR), Los Angeles, USA, June 7–9, 2005 , Fiber-7.

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Figures (4)

Fig. 1.
Fig. 1. Architecture of master-oscillator/fiber-amplifier system. MO: Master oscillator; OI: Optical isolator; L: Lens; YDF: Yb-doped fiber; LPF: Dichroic long-pass filter (~98% transmission at 1062, ~98% reflection at 976nm); BPF: Optical band-pass filter (600pm bandwidth, >50dB out-of-band rejection); PCF: Yb-doped photonic-crystal fiber.

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Fig. 2.
Fig. 2. PCF-amplifier pulse energy and average power vs. launched pump power. Dashed line: Linear fit. Inset: Pulse temporal profile at 1.05mJ pulse energy.

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Fig. 3.
Fig. 3. Solid triangles and hollow circles: Beam radius measured along perpendicular directions (Rx and Ry, respectively) as a function of distance z from waist location. Solid lines: Fit to the expression Rx,y = w{1+[M2λz/(πw2)]2}0.5, where λ is the wavelength and w is the radius of the beam at waist.

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Fig. 4.
Fig. 4. Peak-normalized spectrum of PCF amplifier output at 1.05mJ pulse energy. Inset: High-resolution scan of the signal spectrum vs. frequency shift from the peak.

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