Semiconductor optical amplifiers (SOAs) having nano-sized quantum dot (QD) particles show attractive features such as
the achievement of a steady temperature characteristic, low power consumption, and a high-speed response to the input
signal. QD active layers were designed to 15 stacks of InAs QDs, AlGaAs/GaAs double hetero structure. QD-SOAs
were fabricated for optical triode that can be used with a 1.3 μm band. Modulation results extracted by input, control and
output waveforms support the fact that cross-gain modulation and negative feedback amplification effect can be strongly
contributed to obtain essential factors for future application such as dramatical baseline suppression of output signal and
satisfying high modulation. Optical triode revealed inverted type characteristics that high output power can readily
obtained by be increased quite small amount of input power while output power rarely change though input power
increase high. Fulfillment of far more upgraded stable high-speed bit rate was completed by optical triode improved by
QD-SOA and it's containing cross-gain modulation effect. 40 Gbps performance optical triode will be the accelerator for
realization of the functions of regeneration, reshaping, multiple-wavelength processing, wavelength conversion, and
demultiplexing of high-bit rate patterned optical signals.
Semiconductor optical amplifier (SOA) module, RSOA, SOA with mirror has become an essential component to be at
the head of negative feedback amplification effect, optimum gain, and cross-gain modulation with demand for longer
transmission lengths. The SOA module is expected to have an advantage of exhibiting much faster negative feedback
(NF) response because distance of optical signal passing through component to component is shorten than system
connected with fibers. Scattered degree and baseline line difference of eye-pattern diagrams demonstrated that NF effect
can be compensated compactness and stability from band pass filter in SOA module. Modulation degree (MD) of input
and output signals confirmed that SOA module with NF effect can be stabilized gain and waveguide of output signal and
reduced a wave distortion as well as consistent with results in eye-pattern waveform and bit error rate (BER). All-optical
switching triode with SOA module was realized in about 60 % output modulation degree at control power range of 0.01
to 1 mW. We propose that our manufactured SOA module become strong component candidate to realize all optical
switching triode with NF effect for high speed optical processing in next generation.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.