Design of sampled grating DBR lasers with integrated semiconductor optical amplifiers

Single-Chip Wavelength Conversion Using a Photocurrent-Driven EAM Integrated With a Widely Tunable Sampled-Grating DBR Laser

“…Of particular importance are network functions like wavelength provisioning, add-drop multiplexing, and packet switching that require the use of fast, dynamic wavelength conversion. The InP-InGaAsP offset quantum-well shallow-ridge technology platform has been shown to be convenient for monolithic integration of advanced wavelength agile PICs that promise to perform these functions [1], [2], [4], [6]. Of particular importance are devices that can perform dynamic wavelength conversion.…”

Degradation of the Mode Suppression in Single-Mode Laser Diodes Due to Integrated Optical Amplifiers

“…We neglect spatial hole burning and hence assume a uniform carrier density in the active layer of the laser. With the ASE from the SOA incident into the laser and the spontaneous emission generated within the laser, we have (1) In this equation, is the relative variation of the power (smallsignal over steady-state power) and is defined by (2) where is the spatial profile of the photon density in the laser cavity and is the slowly varying, complex amplitudes of forward and backward propagating fields, corresponding to the chosen longitudinal mode. It is assumed that the fields are normalized such that their squared amplitude represents the power.…”

“…To derive (1), and have to be chosen such that they fullfill the static coupled wave equations (i.e., also without spontaneous emission). For a side mode, this means that is the threshold carrier density of that side mode.…”

“…They are therefore often integrated with a semiconductor optical amplifier (SOA) to boost the output power [1], [2]. In a number of previous papers [3], [4], it was shown that in such configurations the ASE from the amplifier couples into the laser diode and may affect the relative intensity noise (RIN) and the linewidth of these laser diodes.…”

Monolithic Wavelength Converters: Many-Body Effects and Saturation Analysis

“…The receiver integrates signal preamplification by a semiconductor optical amplifier (SOA) and signal detection by a waveguide photodiode (WPD). The optical signal is converted into an electrical signal that directly modulates a SG-DBR laser diode that is integrated with a semiconductor optical amplifier for signal enhancement [7]. The SG-DBR laser can be widely tuned to emit at any wavelength of the C-band [8].…”