Drive current noise induced linewidth in tunable multielectrode lasers

Drive current noise induced linewidth in tunable multielectrode lasers

It is shown that drive current noise could lead to an important increase of linewidth and a Gaussian line shape of tunable multielectrode distributed Bragg reflector (DBR) lasers. As an example, the drive current noise induced linewidth (DCNIL) has been measured to be about 120 MHz using a standard...

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Veröffentlicht in:IEEE photonics technology letters 1991-04, Vol.3 (4), p.302-304
Hauptverfasser: Duan, G.H., Gallion, P.
Format: Artikel
Sprache:eng
Schlagworte:
Current measurement
Distributed Bragg reflectors
Drives
Engineering Sciences
Gaussian noise
Laser noise
Laser tuning
Multi-stage noise shaping
Noise measurement
Shape
Tunable circuits and devices
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Zusammenfassung:It is shown that drive current noise could lead to an important increase of linewidth and a Gaussian line shape of tunable multielectrode distributed Bragg reflector (DBR) lasers. As an example, the drive current noise induced linewidth (DCNIL) has been measured to be about 120 MHz using a standard DC source through at 50 Omega resistor to drive the Bragg section of a tested DBR laser. For tunable lasers with an electronic tuning efficiency of more than 1 GHz/mA ultralow noise current sources should be used to ensure a negligible DCNIL.< >
ISSN:1041-1135
1941-0174
DOI:10.1109/68.82093