Abstract

We present a compact supercontinuum source using a dispersion-shifted fiber and an amplified diode-laser pulse source. Gain-switched DFB laser operating at 1550-nm wavelength, which provides 30-ps pulses, was used for generating the seeding pulses. And serially cascaded low-cost EDFAs were employed to boost the peak power of the pulses to more than 1 kW. Single-mode supercontinuum spanning nearly the full near-IR band was obtained by passing the amplified high-power pulses through a dispersion-shifted fiber. By investigating various characteristics of the supercontinuum generation, the walk-off between the spectral components was found to limit the effective interaction length of the spectrum-broadening effects. An optimal length of the fiber to obtain a flat spectrum was determined, which minimizes undesirable excessive Raman effect.

© 2006 Optical Society of America

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    [CrossRef]
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Electron. Lett.

R. Calvani, R. Caponi, C. Naddeo, and D. Roccato, "Subpicosecond pulses at 2.5GHz from filtered supercontinuum in a fibre pumped by a chirp compensated gain-switched DFB laser," Electron. Lett. 31, 1685-1686 (1995).
[CrossRef]

IEEE Photon. Technol. Lett.

T. Morioka, K. Mori, S. Kawanishi, and M. Saruwatari, "Multi-WDM-channel, Gbit/s pulse generation from a shingle laser source utilizing LD-pumped supercontinuum in optical fibers," IEEE Photon. Technol. Lett. 6, 365-368 (1994).
[CrossRef]

J. Opt. Soc. Am. B

Opt. Express

P.-L. Hsiung, Y. Chen, T. H. Ko, J. G. Fujimoto, C. J. S. de Matos, S. V. Popov, J. R. Taylor, and V. P. Gapontsev, "Optical coherence tomography using a continuous-wave, high-power, Raman continuum light source," Opt. Express 12, 5287-5295 (2004). <a href "http://www.opticsexpress.org/abstract.cfm?URI=OPEX-12-22-5287">http://www.opticsexpress.org/abstract.cfm?URI=OPEX-12-22-5287</a>
[CrossRef] [PubMed]

A. B. Rulkov, M. Y. Vyatkin, S. V. Popov, J. R. Taylor, and V. P. Gapontsev, "High brightness picosecond all-fiber generation in 525-1800nm range with picosecond Yb pumping," Opt. Express 13, 377-381 (2005). <a href="http://www.opticsexpress.org/abstract.cfm?URI=OPEX-13-2-377">http://www.opticsexpress.org/abstract.cfm?URI=OPEX-13-2-377</a>
[CrossRef] [PubMed]

J. Teipel, D. Turke, H. Giessen, A. Killi, U. Morgner, M. Lederer, D. Kopf, and M. Kolesik, "Diode-pumped, ultrafast, multi-octave supercontinuum source at repetition rates between 500 kHz and 20 MHz using Yb:glass lasers and tapered fiber," Opt. Express 13, 1477-1485 (2005). <a href= "http://www.opticsexpress.org/abstract.cfm?URI=OPEX-13-5-1477">http://www.opticsexpress.org/abstract.cfm?URI=OPEX-13-5-1477</a>
[CrossRef] [PubMed]

W. J. Wadsworth, N. Joly, J. C. Knight, T. A. Birks, F. Biancalana, and P. St. J. Russell, "Supercontinuum and four-wave mixing with Q-switched pulses in endlessly single-mode photonic crystal fibres," Opt. Express 12, 299-309 (2004) <a href= "http://www.opticsexpress.org/abstract.cfm?URI=OPEX-12-2-299">http://www.opticsexpress.org/abstract.cfm?URI=OPEX-12-2-299</a>
[CrossRef] [PubMed]

P.-A. Champert, V. Couderc, P. Leproux, S. Fevrier, V. Tombelaine, L. Labonte, P. Roy, C. Froehly, and P. Nerin, "White-light supercontinuum generation in normally dispersive optical fiber using original multi-wavelength pumping system," Opt. Express 12, 4366-4371 (2004). <a href="http://www.opticsexpress.org/abstract.cfm?URI=OPEX-12-19-4366">http://www.opticsexpress.org/abstract.cfm?URI=OPEX-12-19-4366</a>
[CrossRef] [PubMed]

Opt. Lett.

A. K. Abeeluck, C. Headley, and C. G. Jorgensen, "High-power supercontinuum generation in highly nonlinear, dispersion-shifted fibers by use of a continuous-wave Raman fiber laser," Opt. Lett. 29, 2163-2165 (2004).
[CrossRef] [PubMed]

B. Povazay, K. Bizheva, A. Unterhuber, B. Hermann, H. Sattmann, A. F. Fercher, W. Drexler, A. Apolonski, W. J. Wadsworth, J. C. Knight, P. St. J. Russel, M. Vetterlein, and E. Scherzer, "Submicrometer axial resolution optical coherence tomography," Opt. Lett. 27, 1800-1802 (2002).
[CrossRef]

J. W. Nicholson, M. F. Yan, P. Wisk, J. Fleming, F. DiMarcello, E. Monberg, A. Yablon, C. Jorgensen, and T. Veng, "All-fiber, octave-spanning supercontinuum," Opt. Lett. 28, 643-645 (2003).
[CrossRef] [PubMed]

K. Bizheva, B. Povazay, B. Hermann, H. Sattmann, W. Drexler, M. Mei, R. Holzwarth, T. Hoelzenbein, V. Wacheck, and H. Penhamberger, "Compact, broad-bandwidth fiber laser for sub-2-µm axial resolution optical coherence tomography in the 1300-nm wavelength region," Opt. Lett. 28, 707-709 (2003).
[CrossRef] [PubMed]

A. Mussot, T. Sylvestre, L. Provino, and H. Maillote, "Generation of a broadband single-mode supercontinuum in a conventional dispersion-shifted fiber by use of a subnanosecond microchip laser," Opt. Lett. 28, 1820-1822 (2003).
[CrossRef] [PubMed]

A. Galvanauskas, M. E. Fermann, P. Blixt, J. A. Tellefsen, Jr, and D. Harter, "Hybrid diode-laser fiber-amplifier source of high-energy ultrashort pulses," Opt. Lett. 19, 1043-1045 (1994).
[CrossRef] [PubMed]

Opt. Photon. News

H. Takara, "Multiple optical carrier generation from a supercontinuum source," Opt. Photon. News 13, 48-51 (2002).
[CrossRef]

Other

G. P. Agrawal, Nonlinear Fiber Optics, 3rd Ed. (Academic Press, New York, 2001).

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Figures (5)

Fig. 1.
Fig. 1.

Schematic view of the ADP (amplified diode-laser pulse) source used in SC generation

Fig. 2.
Fig. 2.

Spectra of the supercontinua generated with DSFs (λ0 = 1504 nm) of different lengths (0, 3, 5, 15, 50 and 200 m) by pumping 1-MHz 48-mWavg pulses at 1550 nm. They are displayed with 20 dB offset for better clarity and visibility.

Fig. 3.
Fig. 3.

Maximum spectral broadening in the short-wavelength side, Δfmax as a function of the fiber length.

Fig. 4.
Fig. 4.

Relative time delays of the spectral components of the supercontinuum generated with the DSFs of 0, 3 and 15 meters in the same condition as that of Fig. 2.

Fig. 6.
Fig. 6.

Spectrum of the supercontinuum generated by 50-kHz 12mWavg ADP pumping with the time-gating ASE suppression scheme, using a 20-m-long DSF.

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