Propagation of quasisolitons in a fiber Bragg grating written in a slow saturable fiber amplifier

Journal Article · Sun May 15 04:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.053803· OSTI ID:21546853

Shapira, Yuval P; Horowitz, Moshe ^[1]

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1. Department of Electrical Engineering, Technion-Israel Institute of Technology, Haifa 32000 (Israel)

We show, by using numerical simulations, that quasisolitons can propagate over a long distance in a fiber Bragg grating that is written in a slow saturable fiber amplifier, such as an erbium-doped fiber amplifier. During the pulse propagation, the front end of the pulse experiences a net gain while the rear end of pulse is attenuated due to the combination of gain saturation and loss. However, the pulse profile almost does not change after propagating over a length of 5 m that is approximately 2500 times larger than the spatial pulse width. The pulse amplitude has an approximately hyperbolic secant profile. We develop a reduced model by using a multiscale analysis to study solitary-wave propagation when nonlinearity and gain are small. When gain saturation also becomes small we find analytically a new family of solitary-wave hyperbolic-secant solutions that approximately solve the reduced model. The solitary waves propagate slightly faster than Bragg solitons that propagate in fiber Bragg gratings without gain and loss.

• OSTI ID: 21546853
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 83; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AMPLIFIERS
AMPLITUDES
BRAGG REFLECTION
COMPUTERIZED SIMULATION
DOPED MATERIALS
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
ERBIUM
FIBERS
GRATINGS
MATERIALS
MATHEMATICAL SOLUTIONS
METALS
NONLINEAR PROBLEMS
OPTICAL FIBERS
PULSES
QUASI PARTICLES
RARE EARTHS
REFLECTION
SATURATION
SIMULATION
SOLITONS
WAVE PROPAGATION