
Page 29 / 40
2011
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SOA improvements
Quantum-dot SOAs:
Very wide bandwidth
Ultrafast electron transitions + wetting layer ⇒ gain is clamped
LOA: SOA + VCSEL
Active layer sandwiched between Bragg reflectors
⇒ Laser perpendicular to signal propagation
⇒ Clamps carrier density ⇒ better linearity
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