Theory of Nondegenerate Four-Wave Mixing Between Pulses in a Semiconductor Waveguide
نویسندگان
چکیده
We develop a perturbation theory for calculating the effects of saturation on nondegenerate four-wave mixing between short optical pulses in a semiconductor optical amplifier. Saturation due to ultrafast intraband dynamics like carrier heating and spectral hole burning is found to be important for pulses on the order of 10–20 ps or less.
منابع مشابه
Theory of nondegenerate-spectrum reversal and its breaking
We theoretically study spectrum reversal and spectral-temporal similarity-and-inversion phenomena in nondegenerate four-wave mixing of ultrashort optical pulses. The key ingredients leading to spectrum reversal between two waves are identified, showing that energy conservation alone is insufficient. Only under certain conditions can the shapes of the two waves in the time and frequency domains ...
متن کاملFundamentals of Highly Non-Degenerate Cascaded Four-Wave Mixing
By crossing two intense ultrashort laser pulses with different colors in a transparent medium, like a simple piece of glass, a fan of multicolored broadband light pulses can be simultaneously generated. These newly generated pulses are emitted in several well-defined directions and can cover a broad spectral range, from the infrared to the ultraviolet and beyond. This beautiful phenomenon, firs...
متن کاملImproving the Thermal Characteristics of Semiconductor Lasers Using a New Asymmetric Waveguide Structure
Self-heating leads to a temperature rise of the laser diode and limits the output power and efficiency due to increased loss and decreased differential gain. To control device self-heating, it is required to design the laser structure with a low optical loss, while the heat flux must spread out of the device efficiently. In this study, a new asymmetric waveguide design is proposed and th...
متن کاملUltraslow propagation of matched pulses by four-wave mixing in an atomic vapor.
We have observed the ultraslow propagation of matched pulses in nondegenerate four-wave mixing in a hot atomic vapor. Probe pulses as short as 70 ns can be delayed by a tunable time of up to 40 ns with little broadening or distortion. During the propagation, a probe pulse is amplified and generates a conjugate pulse which is faster and separates from the probe pulse before getting locked to it ...
متن کاملFWM Wavelength Conversion Analysis in a 3-Integrated Portion SOA and DFB Laser using Coupled Wave Approach and FD-BPM Method
In this paper we have numerically analyzed terahertzrange wavelength conversion using nondegenerate four wave mixing (NDFWM) in a SOA integrated DFB laser (experiments reported both in MIT electronics and Fujitsu research laboratories). For analyzing semiconductor optical amplifier (SOA), we use finitedifference beam propagation method (FDBPM) based on modified nonlinear SchrÖdinger equation an...
متن کامل