Journal of Lasers, Optics & Photonics

Sazzad MS Imran

Publications

• Review Article
  Effect of High Frequency Current Injection on Optical Feedback Noise in Semiconductor Lasers Operating in Multimode
  Author(s): Sazzad MS ImranSazzad MS Imran
  
  The performance of semiconductor injection lasers is limited by optical feedback noise. The laser intensity noise is greatly increased even by small amount of optical feedback. Although superposition of high-frequency current on the injection current is popularly used to solve the problem, proper modulation frequency and depth must be  chosen empirically. In this paper, we numerically analyze this problem based on a set of multimode rate equations, modified to include OFB (optical feedback) and HFI (high frequency current). We concentrate only on low frequency type noise where intensity noise is maximum in the lower frequency region. The results show that the feedback noise was reduced when HFI released coupling effects and thereby suppressed mode hopping. The feedback noise was still remained high when the modulation frequency was coincided with a rational number of the round tr.. Read More»
  DOI: 10.4172/2469-410X.1000106

  Abstract PDF