RT Journal Article
SR 00
ID 10.1049/ip-opt:20050048
A1 Hurtado Villavieja, Antonio
A1 González Marcos, Ana
A1 Martín Pereda, José Antonio
A1 Adams, M. J.
T1 Two-wavelength switching with a distributed-feed back semiconductor optical amplifier (DFBSOA)
JF IEE Proceedings-Optoelectronics
YR 2006
FD 2006-02-13
VO 153
IS 1
SP 21
OP 27
K1 Distributed feedback lasers, laser beams, laser feedback  optical bistability, optical switches, semiconductor optical amplifiers
AB Switching of a signal beam by another control beam at different wavelength is demonstrated experimentally using the optical bistability occurring in a 1.55 mm-distributed  feedback semiconductor optical amplifier (DFBSOA) working in reflection. Counterclockwise (S-shaped) and reverse (clockwise) bistability are observed in the output of the control and the signal beam respectively, as the power of the input control signal is increased. With this technique  an optical signal can be set in either of the optical input wavelengths by appropriate choice of the powers of the input signals. The switching properties of the DFBSOA are studied experimentally as the applied bias current is increased from below to above threshold and for different levels of optical power in the signal beam and different wavelength detunings between both input signals. Higher on-off extinction ratios, wider bistable loops and lower input power requirements for switching are obtained when the DFBSOA is operated slightly above its threshold value.
PB Institution of Engineering and Technology
SN 1350-2433
LK http://oa.upm.es/21283/
UL http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=1584372