Abstract

We report on a mid-infrared (mid-IR) source consisting of an 10W average-power, linearly polarized 1.54μm wavelength pulsed fiber source pumping an optical parametric oscillator. From this source, we obtained average power in excess of 1W in the 3.84.0μm wavelength range at a pulse repetition frequency of 100kHz. With a slightly different setup, we also achieved an average power of 0.25W at 4.5μm wavelength. To our knowledge, these values represent the highest mid-IR power obtained through wavelength conversion of an eye-safe fiber source.

© 2006 Optical Society of America

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References

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  1. I. Lindsay, B. Adhimoolam, P. Groß, M. Klein, and K. Boller, Opt. Express 13, 1234 (2005).
    [Crossref] [PubMed]
  2. C. Da-Wun and T. S. Rose, in Conference on Lasers and Electro-Optics (CLEO) (Optical Society of America, 2005), p. 1829.
    [Crossref]
  3. A. Henderson and R. Stafford, Opt. Express 14, 767 (2006).
    [Crossref] [PubMed]
  4. P. E. Britton, H. L. Offerhaus, D. J. Richardson, P. G. R. Smith, G. W. Ross, and D. C. Hanna, Opt. Lett. 24, 975 (1999).
    [Crossref]
  5. M. V. O'Connor, M. A. Watson, D. P. Shepherd, D. C. Hanna, J. H. V. Price, A. Malinowski, J. Nilsson, N. G. R. Broderick, D. J. Richardson, and L. Lefort, Opt. Lett. 27, 1052 (2002).
    [Crossref]

2006 (1)

2005 (1)

2002 (1)

1999 (1)

Adhimoolam, B.

Boller, K.

Britton, P. E.

Broderick, N. G. R.

Da-Wun, C.

C. Da-Wun and T. S. Rose, in Conference on Lasers and Electro-Optics (CLEO) (Optical Society of America, 2005), p. 1829.
[Crossref]

Groß, P.

Hanna, D. C.

Henderson, A.

Klein, M.

Lefort, L.

Lindsay, I.

Malinowski, A.

Nilsson, J.

O'Connor, M. V.

Offerhaus, H. L.

Price, J. H. V.

Richardson, D. J.

Rose, T. S.

C. Da-Wun and T. S. Rose, in Conference on Lasers and Electro-Optics (CLEO) (Optical Society of America, 2005), p. 1829.
[Crossref]

Ross, G. W.

Shepherd, D. P.

Smith, P. G. R.

Stafford, R.

Watson, M. A.

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Figures (6)

Fig. 1
Fig. 1

Layout of mid-IR source. FBG, fiber Bragg grating (center wavelength 1545 nm , 3 dB linewidth 0.5 nm ); IP, in-line fiber-coupled polarizer; ASE, PM single-mode Er-doped fiber used as an amplified spontaneous emission source; PDL, pump diode laser; BPF, bandpass filter (center wavelength 1545 nm , 3 dB linewidth 1 nm ); OI, fiber-coupled optical isolator; SOA, semiconductor optical amplifier; PCS, pulsed current supply; EDFA, PM single-mode Er-doped preamplifier; EYDF, PM, double-clad Er Yb -doped fiber; L, lens; λ 2 , half-wave plate; P, bulk polarizer (used together with the half-wave plate as a variable attenuator); BI, bulk optical isolator; MW, meniscus window; PPLN, periodically poled lithium niobate crystal.

Fig. 2
Fig. 2

Performance of the eye-safe pulsed fiber source. (a) Peak-normalized spectrum (logarithmic scale). (b) M 2 measurement of the output beam. Solid circles and hollow squares, measured beam width along orthogonal directions; solid and dashed curves, hyperbolic fits to each data set (see text for results). (c) Pulse average power and corresponding energy versus power emitted by the diode laser pumping the final Er Yb -doped fiber amplifier. inset, pulse temporal profile at maximum power. The pulse peak power was 12 kW .

Fig. 3
Fig. 3

OPO idler-beam average power at 3.95 μ m wavelength and corresponding pulse energy (PRF, 100 kHz ) versus average power of the 1.54 μ m pump beam. Solid line, linear fit.

Fig. 4
Fig. 4

OPO idler-beam average power and corresponding pump → idler conversion efficiency versus idler-beam wavelength. Inset, M 2 measurement of the OPO idler beam ( 3.83 μ m wavelength). Solid circles and hollow squares, measured beam width along orthogonal directions; solid and dashed curves, hyperbolic fits to each data set.

Fig. 5
Fig. 5

OPO idler-beam average power versus PRF for two different idler wavelengths.

Fig. 6
Fig. 6

Average power of the 4.50 μ m wavelength idler beam produced by the MgO : PPLN OPO (see text) and corresponding pulse energy (PRF, 100 kHz ) versus average power of the 1.54 μ m wavelength pump beam. Solid line, linear fit.

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