Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
Journal Home About Issues in Progress Current Issue All Issues Feature Issues

Spectral broadening of a partially coherent CW laser beam in single-mode optical fibers

A. Mussot, E. Lantz, H. Maillotte, T. Sylvestre, C. Finot, and S. Pitois

Open Access Open Access

Abstract

The nonlinear propagation of a partially coherent continuous-wave laser beam in single-mode optical fibers is investigated both theoretically and experimentally, with a special attention to the zero-dispersion wavelength region where modulation instability is expected. Broadband asymmetric spectral broadening is reported experimentally and found in fairly good agreement with a numerical Schrödinger simulation including a phase-diffusion model for the partially coherent beam. This model shows in addition that the underlying spectral broadening mechanism relies not only on modulation instability but also on the generation of high-order soliton-like pulses and dispersive waves. The coherence degradation which results from these ultrafast phenomena is confirmed by autocorrelation measurement.

©2004 Optical Society of America

Full Article  |  PDF Article
More Like This
Blue solitary waves from infrared continuous wave pumping of optical fibers

J. C. Travers
Opt. Express 17(3) 1502-1507 (2009)

Cavity dispersion management in continuous-wave supercontinuum generation

Sonia Martin-Lopez, Pedro Corredera, and Miguel Gonzalez-Herraez
Opt. Express 17(15) 12785-12793 (2009)

The role of pump incoherence in continuous-wave supercontinuum generation

Frédérique Vanholsbeeck, Sonia Martin-Lopez, Miguel González-Herráez, and Stéphane Coen
Opt. Express 13(17) 6615-6625 (2005)

View More...

Supplementary Material (1)

Media 1: AVI (1864 KB)     

Cited By

Optica participates in Crossref's Cited-By Linking service. Citing articles from Optica Publishing Group journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (4)
Fig. 1.
Fig. 1. (a) Temporal intensity and (b) power spectrum of a PC laser beam in a single-mode optical fiber at three propagation distances (z=0, red, z=300m, green, and z=3100 m, blue). The entire sequence can be viewed as a movie (avi, 1865 kb). PC wave’s parameters are λ=1555 nm, P=600 mW, Δf=50 GHz. Fiber’s parameters are β 2=-5.5.10-28s2m-1, β 3=1.15.10-40s3m-1, β 4=-2.85.10-55s4m-1, λ0=1549 nm, γ=2W-1km-1, α=4.6.10-5m-1. [Media 1]

Download Full Size | PDF

Fig. 2.
Fig. 2. Ouput/Input spectral widths ratio of a PC wave after 3100 m of propagation in a single-mode optical fiber. Solid lines: analytical prediction Eq. (4), Crosses and circles: numerical results.

Download Full Size | PDF

Fig. 3.
Fig. 3. (a) Experimental and (b) simulated spectra for increasing pump power. blue : output, from bottom to top (a) P=0.8, 1, 1.4, and 1.8 W and (b) P=0.4, 0.5, 0.7, 0.9 W. Green : normal dispersion P=1.4 W. Red: input at (a) 0.8 W and (b) 0.4 W.

Download Full Size | PDF

Fig. 4.
Fig. 4. (a) Experimental and (b) theoretical intensity autocorrelation functions for same increasing power levels as in Fig. 3. Red line: Input. Blue lines: Output.

Download Full Size | PDF

Equations (5)

Equations on this page are rendered with MathJax. Learn more.

∂ A ∂ z + i β 2 2 ∂ 2 A ∂ t 2 − β 3 6 ∂ 3 A ∂ t 3 − i β 4 24 ∂ 4 A ∂ t 4 + α 2 A = i γ ∣ A ∣ 2 A
A P ( t ) = P 0 × exp ( i φ ( t ) )
Γ ( t , z ) = < A P * ( t , z ) A P ( t , z ) >
Δ Ω = 4 ( γ P ∣ β 2 ∣ ) 1 ⁄ 2
δ ω = − 3 β 2 β 3 + 4 β 3 γ P 3 β 2 2 .
Select as filters
Select Topics Cancel
Top
       
© Copyright 2024 | Optica Publishing Group. All rights reserved, including rights for text and data mining and training of artificial technologies or similar technologies.
Privacy | Terms of Use