Invited Article: Four-mode semiconductor optical amplifier

Invited review article: The Josephson bifurcation amplifier.

We review the theory, fabrication, and implementation of the Josephson bifurcation amplifier (JBA). At the core of the JBA is a nonlinear oscillator based on a reactively shunted Josephson junction. A weak input signal to the amplifier couples to the junction critical current I(0) and results in a dispersive shift in the resonator plasma frequency omega(p). This shift is enhanced by biasing the...

All-Optical Switching of Picosecond Pulses by Four-Wave Mixing in a Semiconductor Optical Amplifier

High-speed all-optical switching is demonstrated by four-wave mixing (FWM) of picosecond pulses using semiconductor optical amplifiers (SOA). A light source for measurement and switching in the 1.5 μm region is produced using a normal group velocity dispersion fiber and optical parametric oscillator. The output supercontinuum (SC) optical pulses, with a spectral width of approximately 300 nm, a...

Efficient Optical Phase modalation using A Semiconductor Optical Amplifier

Semiconductor-Optical-Amplifier Mach-Zehnder Interferometer Based Optical Networks

In this paper, an all-optical AND logic scheme which exploits the cross-phase modulation (XPM) effect in semiconductor-optical-amplifier-assisted Mach-Zehnder Interferometer (SOA-MZI), is proposed, performance analyzed and parameters optimized. The proposal is validated and the system performance under various parameters is examined through numerical simulations. With only moderate parameters, ...

Numerical study of mode-locked semiconductor optical amplifier fiber ring laser

Based on self-reproduction theory, harmonic and rational harmonic mode-locked semiconductor optical amplifier (SOA) fiber ring lasers have been numerically investigated, respectively. Harmonic mode locking makes a target of obtaining ultra-short pulse. While in rational harmonic mode locking, it is urgently needed to solve that pulse amplitude becomes uneven with the increase of the order of ra...