A novel optical power monitoring method based on optoelectronic oscillators incorporating semiconductor optical amplifiers is presented and a prototype of two nodes distributed online optical power monitor with dynamic measuring range of 6dB and accuracy of 0.25dB is experimentally demonstrated.
We introduce an optically controlled microwave phase stabilizer based on polarization interference technique using single
semiconductor optical amplifier (SOA). A prototype with a frequency of 10 GHz is experimentally demonstrated. It
provides a stable phase drift that can be linearly compensated over 10 km single-mode fiber by controlling the SOA injection
current.
We introduce an optical delay line based on the nonlinear birefringence effects in a polarization-maintaining fiber Bragg grating (PMFBG). A 92 ps delay (approximate 360° phase shifts at 10 GHz) is demonstrated with independent of the optical wavelength drifting by tuning the polarization angle of the polarization controller (PC) from 0 to 90°.
As a special case of continuous phase frequency-shift-keying (FSK), minimum-shift keying (MSK) exhibits some
different properties compared with the traditional optical phase modulation formats, such as return-to-zero (RZ)
differential-phase-shift-keying (DPSK) and differential-quadrature-phase-shift-keying (DQPSK). In this paper, we
investigated the receiver performance degradation caused by laser frequency offset between laser frequency and delay
interferometer (DI) phase, which is found to be the most critical impairment for the receiver performance in a practical
optical phase modulated system. Results show that MSK system is about double times and six times more robust to
frequency offsets than RZ-DPSK and RZ-DQPSK systems operating at the same 10Gb/s bit rate, respectively.
This paper demonstrates bandwidth requirement for optical DPQSK transmitter using one Dual-drive Mach Zehnder
Modulator (DDMZM) for 100Gb/s physical transmission. The result shows that at receiver bandwidth of 40GHz, NRZDQPSK
signal requires 60GHz modulation bandwidth at least, while RZ-DQPSK scheme demands less bandwidth,
about 40GHz for 50% duty cycle RZ-DQPSK signal.
In this article optical minimum-shift keying (MSK) modulation format in 9×40 Gbit/s wavelength-division multiplexing
(WDM) spacing of 100 GHz transmission systems is investigated and compared with return-to-zero differential
phase-shift keying (RZ-DPSK) and return-to-zero (RZ). The performance of optical MSK in presence of amplification
noise, chromatic dispersion and nonlinear effects is analytically determined. Operations over a wide range of parameters,
such as span input power, precompensation value, and chromatic dispersion parameter are performed; experimental
results show that optical MSK demonstrates special performance in transmission distance, nonlinear effects, and
dispersion tolerance.
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.