Abstract

A microchip-laser-pumped optical parametric amplifier produces 35-μJ, 1.537-μm pulses of 190-ps duration at 8  kHz, in a near-diffraction-limited output beam with a Fourier-transform-limited spectrum. The flight-ready laser head is pumped by 20 W of optical power from two fiber-coupled laser-diode arrays, occupies a volume of 0.14 liters, and has a mass of 0.34  kg.

© 2007 Optical Society of America

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References

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  1. M. A. Albota, R. M. Heinrichs, D. G. Kocher, D. G. Fouche, B. E. Player, M. E. O'Brien, B. F. Aull, J. J. Zayhowski, J. Mooney, B. C. Willard, and R. R. Carlson, "Three-dimensional imaging laser radar with a photon-counting avalanche photodiode array and microchip laser," Appl. Opt. 41, 7671-7678 (2002).
    [Crossref]
  2. J. J. Zayhowski and C. DillIII, "Diode-pumped passively Q-switched picosecond microchip lasers," Opt. Lett. 19, 1427-1429 (1994).
    [Crossref] [PubMed]
  3. J. J. Zayhowski and A. L. Wilson, Jr., "Pump-induced bleaching of the saturable absorber in short-pulse Nd:YAG/Cr4+:YAG passively Q-switched microchip lasers," IEEE J. Quantum Electron. 39, 1588-1593 (2003).
    [Crossref]
  4. J. J. Zayhowski and A. L. Wilson, Jr., "Energy-scavenging amplifiers for miniature solid-state lasers," Opt. Lett. 29, 1218-1220 (2004).
    [Crossref] [PubMed]
  5. J. J. Zayhowski and A. L. Wilson, Jr., "Miniature, pulsed Ti:sapphire laser system," IEEE J. Quantum Electron. 38, 1449-1454 (2002).
    [Crossref]
  6. T. H. Jeys, "Multipass optical parametric amplifier," Opt. Lett. 21, 1229-1231 (1996).
    [Crossref] [PubMed]

2004 (1)

2003 (1)

J. J. Zayhowski and A. L. Wilson, Jr., "Pump-induced bleaching of the saturable absorber in short-pulse Nd:YAG/Cr4+:YAG passively Q-switched microchip lasers," IEEE J. Quantum Electron. 39, 1588-1593 (2003).
[Crossref]

2002 (2)

1996 (1)

1994 (1)

Albota, M. A.

Aull, B. F.

Carlson, R. R.

Dill, C.

Fouche, D. G.

Heinrichs, R. M.

Jeys, T. H.

Kocher, D. G.

Mooney, J.

O'Brien, M. E.

Player, B. E.

Willard, B. C.

Wilson, A. L.

J. J. Zayhowski and A. L. Wilson, Jr., "Energy-scavenging amplifiers for miniature solid-state lasers," Opt. Lett. 29, 1218-1220 (2004).
[Crossref] [PubMed]

J. J. Zayhowski and A. L. Wilson, Jr., "Pump-induced bleaching of the saturable absorber in short-pulse Nd:YAG/Cr4+:YAG passively Q-switched microchip lasers," IEEE J. Quantum Electron. 39, 1588-1593 (2003).
[Crossref]

J. J. Zayhowski and A. L. Wilson, Jr., "Miniature, pulsed Ti:sapphire laser system," IEEE J. Quantum Electron. 38, 1449-1454 (2002).
[Crossref]

Zayhowski, J. J.

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Figures (15)

Fig. 1
Fig. 1

Miniature, 190-ps, eye-safe source for three-dimensional imaging.

Fig. 2
Fig. 2

Optical path superimposed on assembly drawing of laser system.

Fig. 3
Fig. 3

1.064-μm pulse energy versus peak current to laser-diode array pumping double-pass amplifier.

Fig. 4
Fig. 4

Oscilloscope trace of amplifier output with 1-s persistence. The measured pulse width (FWHM) of the output is 190 ps; the bandwidth of the oscilloscope is 7 GHz.

Fig. 5
Fig. 5

1.537-μm OPA output versus 1.064-μm pump energy.

Fig. 6
Fig. 6

Pulse width of OPA output versus 1.064-μm pump energy, measured with a 7-GHz oscilloscope.

Fig. 7
Fig. 7

1.537-μm OPA output versus seed power for 148 μJ of pump energy.

Fig. 8
Fig. 8

Pulse width of OPA output versus seed power for 148 μJ of pump energy.

Fig. 9
Fig. 9

Oscilloscope trace of OPA output with 1-s persistence. The measured pulse width (FWHM) of the output is 190 ps; the bandwidth of the oscilloscope is 7 GHz.

Fig. 10
Fig. 10

Relative output energy of OPA versus time.

Fig. 11
Fig. 11

Intensity image and profiles at beam waist.

Fig. 12
Fig. 12

Far-field intensity image and profiles.

Fig. 13
Fig. 13

Spectrum of unseeded OPA with pump energy of 148 μJ. The resolution of the spectrum analyzer is 5 pm.

Fig. 14
Fig. 14

Spectrum of OPA seeded with 1.65 mW, with pump energy of 148 μJ. The resolution of the spectrum analyzer is 5 pm.

Fig. 15
Fig. 15

Pulse energy and spectral width of OPA output versus output wavelength.

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