Generation of high order multi-bound solitons and propagation in optical fibers

We demonstrate experimental generation of multi-bound solitons of up to sextuple in an active FM mode-locked fiber ring laser operating under power saturation in the locking state. The ring laser consists of two booster optical amplifiers operating in saturation regime, an electro-optic phase modulator driven by a sinusoidal electrical wave and a length of dispersive fiber. The periodic phase modulation generates phase chirp of the generated lightwaves in the ring laser. The chirped phase state plays an important role in the phase matching condition for mode-locking as well as the stabilization and the determination of the bound states of multi-solitons. The formation of such high order multi-bound solitons is explained based on the chirping of the phase and the behavior of the optical pulse sequence in the near field region of the dispersive fiber. The propagation of these multi-bound solitons through single mode optical fibers is observed. Experimental and simulation results of bound solitons have been shown to follow similar trends. The propagation of these multi-bound solitons through single mode optical fibers is described. Their mutual interaction through such quadratic phase media shows the influence of the quadratic phase property on the differential phase of individual solitons of the bound group. Simulated results confirm the evolution of the bound solitons over dispersive single mode optical fibers.

[1]  Generation of bound solitons in actively phase modulation mode-locked fiber ring resonators , 2008 .

[2]  S. Wabnitz.  Suppression of soliton interactions by phase modulation , 1993 .

[3]  H. Haus,et al.  Asynchronous soliton mode locking. , 1994, Optics letters.

[4]  L. Wang,et al.  Analysis of polarization-dependent gain in fiber amplifiers , 1998 .

[5]  F. Kärtner,et al.  Solitary-pulse stabilization and shortening in actively mode-locked lasers , 1995 .

[6]  J. Sánchez-Mondragón,et al.  Theory of soliton pulse forming in an actively modelocked fiber laser , 1994 .

[7]  M. Nakazawa,et al.  Pulse energy equalization in harmonically FM mode-locked lasers with slow gain. , 1996, Optics letters.

[8]  Y. Kodama,et al.  Soliton interaction in optical fibers. , 1987, Optics letters.

[9]  Malomed.  Bound solitons in coupled nonlinear Schrödinger equations. , 1992, Physical review. A, Atomic, molecular, and optical physics.

[10]  Dug Young Kim,et al.  Experimental observation of stable bound solitons in a figure-eight fiber laser. , 2002, Optics letters.

[11]  Sergei K. Turitsyn,et al.  Conversion of a chirped Gaussian pulse to a soliton or a bound multisoliton state in quasi-lossless and lossy optical fiber spans , 2007 .

[12]  Hermann A. Haus,et al.  Additive-pulse modelocking in fiber lasers , 1994 .

[13]  Bound solitons in the nonlinear Schrödinger-Ginzburg-Landau equation. , 1991 .

[14]  L. Mollenauer,et al.  Experimental observation of interaction forces between solitons in optical fibers. , 1987, Optics letters.

[15]  M. Desaix,et al.  Propagation properties of chirped soliton pulses in optical nonlinear Kerr media. , 2002, Physical review. E, Statistical, nonlinear, and soft matter physics.

[16]  C. Lu,et al.  Bound soliton fiber laser , 2002, 0910.5806.

[17]  H. Haus,et al.  Subpicosecond solitons in an actively mode-locked fiber laser. , 1996, Optics letters.

[18]  J. Kutz,et al.  Theory and simulation of the dynamics and stability of actively modelocked lasers , 2002 .

[19]  Govind P. Agrawal,et al.  Nonlinear Fiber Optics , 1989 .

[20]  John G. Proakis,et al.  Digital Communications , 1983 .

[21]  François Gutty,et al.  Relative phase locking of pulses in a passively mode-locked fiber laser , 2003 .

[22]  Y. Lai,et al.  Stable new bound soliton pairs in a 10 GHz hybrid frequency modulation mode-locked Er-fiber laser. , 2006, Optics letters.

[23]  J. Gordon.  Interaction forces among solitons in optical fibers. , 1983, Optics letters.

[24]  Michael L. Dennis,et al.  Active-passive modelocking in a single-polarisation erbium fibre laser , 1994 .