A Semiconductor Optical Amplifier (SOA) is essentially a laser diode (LD) with no feedback from its input and output ports and hence is also referred to as a Traveling-Wave Amplifier (TWA). Semiconductor Optical Amplifiers (SOAs) have proven to be versatile and multifunctional devices that are key building blocks for optical networks.
There are five parameters used to characterize a Semiconductor Optical Amplifier (SOA): (1) Gain (Gs); (2) Gain Bandwidth; (3) Saturation Output Power (PSAT); (4) Noise Figure (NF); (5) Polarization Dependent Gain (PDG).
A Semiconductor Optical Amplifier (
Superluminescent Light Emitting Diodes: Device Fundamentals and Reliability
Superluminescent diode (SLD) is an edge-emitting semiconductor light source. The unique property of an SLD is its high output power and low beam divergence, similar to an injection laser diode (LD), but with a broad emission spectrum and low coherence, similar to a light emitting diode (LED). SLDs are similar in geometry to lasers but have no built-in optical feedback mechanism required by LDs for stimulated emission to achieve lasing.
There are six key parameters used to characterize Superluminescent diodes (SLDs):
(1) Output Power
(2) Optical Gain
(3) ASE Spectrum Bandwidth or 3
There are six key parameters used to characterize Superluminescent diodes (SLDs):
(1) Output Power
(2) Optical Gain
(3) ASE Spectrum Bandwidth or 3