6533b7d0fe1ef96bd125b92a

RESEARCH PRODUCT

Electrical and optical low frequency noises in multimodal vertical cavity surface emitting lasers

F. MarinGaetano FerranteS CostaFabio Principato

subject

Materials scienceMulti-mode optical fiberPhysics and Astronomy (miscellaneous)business.industryRelative intensity noiseShot noisePhysics::OpticsOptical powerlow frequency noiseDistributed Bragg reflectorNoise (electronics)VCSELOpticsNoise generatorOptoelectronicsFlicker noisebusinessInstrumentationcoherence function

description

Experimental investigations of the low frequency noise of multimode 780 nm vertical cavity surface emitting lasers are reported. Electrical noise, optical noise and their correlation have been measured in the frequency range 1 Hz–95 kHz. The results show that the main contribution to the electrical noise is located in the distributed Bragg reflector layers of the laser. The optical power and pump current noise sources are strongly correlated below and around the threshold, while are weakly correlated above threshold. It is argued that the noise in the optical power is due to both free injection carrier noise and optical gain fluctuations.

yearjournalcountryeditionlanguage
2006-07-11
10.1002/lapl.200610046http://hdl.handle.net/10447/3850