The research described in this publication was carried out by the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. © 2012. All rights reserved. abstract. — An efficient laser transmitter design is proposed using resonant pumping of an erbium-doped fiber amplifier for a free-space optical communications source...

Stimulated Brillouin Scattering (SBS) is one of the nonlinear process that can occur in optical fiber if the input power at low level [1,2]. It is a natural scattering process associate to the propagation of light in a medium. Due to the interaction of light with the propagation medium, different scattering components are generated: Rayleigh, Brillouin and Raman component. The resulting scatter...

By using a newly designed bidirectional erbium-doped fiber amplifier, we demonstrated a 2 = 2.5 Gbrs repeated bidirectional transmission over a 100-km single-mode fiber. Two tunable optical bandpass filters were used to suppress the Rayleigh backscattering and amplified spontaneous emission in the bidirectional transmission system. The bit error rate performances were measured for both directio...

We study the optical wavelength dependence of the Brillouin gain spectrum for a silica single-mode fiber in the range from 1511 to 1555 nm using a measurement setup containing an erbium-doped fiber amplifier (EDFA) in the Brillouin pump path. The Brillouin peak power and linewidth are clearly dependent on the pump wavelength, the trends of which correspond well with the wavelength dependence of...

Using a modified version of the split-step Fourier method, we analyze the effect of noise on soliton propagation inside erbium-doped fiber amplifiers. In fact, noise from forward-propagating amplified spontaneous emission, associated with a Markov immigration process, is included in the analysis of soliton amplification. Moreover, this algorithm accounts for the real spectral gain profile of th...

Two separate projects were undertaken to improve technology for entangled photon sources, useful for quantum optics. In one project, a pulsed, mode-locked erbium-doped fiber laser, designed to be used as a seed laser for a 390 nm source, was built using polarization-maintaining components to address polarization drift. The fiber laser operated at a center wavelength of 1560.0 nm with an output ...

A short wavelength band Brillouin Erbium Fiber Laser (S-band BEFL) with enhanced characteristics using an additional erbium-doped fiber amplifier (EDFA) in the sub-loop of the BEFL system. Compared with the conventional BEFL without the additional EDFA, the enhanced BEFL has improved the number of channels as well as the flatness of the Brillouin Stoke’s peak power. By incorporating a double-pa...

We report, for the first time to our knowledge, the presence of concentration-induced nonuniform power in tunable erbium-doped fiber lasers. A theoretical model is proposed with pair-induced quenching taken into account. We obtain good agreement between numerical and experimental results of a high-concentration erbium-doped fiber ring laser with a large tuning range of over 100 nm. These findin...

1 OLSSON, N. A., ANDREKSON, A., BECKER, P. C, SIMPSON, J. R., TANBUNEK, T., LOGAN, R. A., PRESBV, H., and WECHT, K.: '4Gbit/s soliton data transmission experiment'. Technical Digest of Optical Fiber Communication Conference '90 (Optical Society of America, Washington, DC), 1990, paper PD4 2 NAKAZAWA, M., SUZUKI, K., YAMADA, E., a n d KIMURA, Y.: 'Distortion-free single-pass soliton communicatio...

In this paper, we study the implementation of a secure key distribution system based on an ultra-long fiber laser with bi-directional erbium-doped amplifier. The resilience was tested against passive attacks from eavesdropper. A similarity observed in spectra for both configurations and no signature that would allow eavesdropper to obtain state during transitions.