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- Martin E. Fermann, Vladimir I. Kruglov, Benn C. Thomsen, John M. Dudley, John D. Harvey
- Physical review letters
- 2000

Ultrashort pulse propagation in high gain optical fiber amplifiers with normal dispersion is studied by self-similarity analysis of the nonlinear Schrödinger equation with gain. An exact asymptotic solution is found, corresponding to a linearly chirped parabolic pulse which propagates self-similarly subject to simple scaling rules. The solution has been… (More)

Pulse propagation in high-gain optical fiber amplifiers with normal group-velocity dispersion has been studied by self-similarity analysis of the nonlinear Schrödinger equation with gain. For an amplifier with a constant distributed gain, an exact asymptotic solution has been found that corresponds to a linearly chirped parabolic pulse that propagates… (More)

- Claude Aguergaray, David Méchin, Vladimir I. Kruglov, John D. Harvey
- Optics express
- 2010

We report here the first demonstration of a mode-locked fiber laser delivering parabolic pulses (similaritons) at 1534 nm. The use of a Raman-based gain medium potentially allows its implementation at any wavelength. The 22nJ output similariton pulses have a true parabolic shape both in the time and spectral domains and a linear chirp. Linear recompression… (More)

- Vladimir I. Kruglov, A. C. Peacock, John M. Dudley, John D. Harvey
- Optics letters
- 2000

Self-similarity techniques are used to study pulse propagation in a normal-dispersion optical fiber amplifier with an arbitrary longitudinal gain profile. Analysis of the nonlinear Schrödinger equation that describes such an amplifier leads to an exact solution in the high-power limit that corresponds to a linearly chirped parabolic pulse. The self-similar… (More)

- Claude Aguergaray, Neil Broderick, Miro Erkintalo, Jocelyn S Y Chen, Vladimir I. Kruglov
- Optics express
- 2012

We report on a new design for a passively mode locked fibre laser employing all normal dispersion polarisation maintaining fibres operating at 1 μm. The laser produces linearly polarized, linearly chirped pulses that can be recompressed down to 344 fs. Compared to previous laser designs the cavity is mode-locked using a nonlinear amplifying fibre loop… (More)

- Vladimir I. Kruglov, A. C. Peacock, John D. Harvey
- Physical review letters
- 2003

A broad class of exact self-similar solutions to the nonlinear Schrödinger equation (NLSE) with distributed dispersion, nonlinearity, and gain or loss has been found. Appropriate solitary wave solutions applying to propagation in optical fibers and optical fiber amplifiers with these distributed parameters have also been studied. These solutions exist for… (More)

- Vladimir I. Kruglov, A. C. Peacock, John D. Harvey
- Physical review. E, Statistical, nonlinear, and…
- 2005

A broad class of exact self-similar solutions to the nonlinear Schrödinger equation (NLSE) with distributed dispersion, nonlinearity, and gain or loss has been found describing both periodic and solitary waves. Appropriate solitary wave solutions applying to propagation in optical fibers and optical fiber amplifiers with these distributed parameters have… (More)

- Vladimir I. Kruglov, Claude Aguergaray, John D. Harvey
- Optics express
- 2012

We present a new asymptotically exact analytical similariton solution of the generalized nonlinear Schrdinger equation for pulses propagating in fiber amplifiers and lasers with normal dispersion including the effect of gain saturation. Numerical simulations are in excellent agreement with this analytical solution describing self-similar linearly chirped… (More)

We consider a version of special relativity assuming that the metric in inertial frames is conformally pseudoeuclidean and depends on some scalar field with zero vacuum average. Applying this modified special relativity to the theory of electroweak interactions, and assuming that the introduced scalar field is proportional to the Higgs field, we show there… (More)

- David Méchin, Sung-Hoon Im, Vladimir I. Kruglov, John D. Harvey
- Optics letters
- 2006

Self-similar propagation of linearly chirped hyperbolic-secant pulses in a comblike decreasing-dispersion fiber amplifier has been observed experimentally for the first time to our knowledge. The scheme takes advantage of an exact solution of the generalized nonlinear Schrödinger equation with distributed coefficients.