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6 GHz direct frequency modulation of cleaved-coupled-cavity channeled-substrate buried-heterostructure lasers

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3 Author(s)
Bowers, J.E. ; AT&T Bell Laboratories, Holmdel, NJ, USA ; Tucker, R.S. ; Burrus, C.A.

The measured intensity modulation (IM) and frequency modulation (FM) characteristics of single-cavity channeled-substrate buried-heterostructure (CSBH) lasers and cleaved-coupled-cavity (C3) CSBH lasers are described. If the bias is well above threshold, the lasers have -3 dB IM bandwidths of approximately 800 MHz. In contrast, the FM response rolls off less rapidly, and efficient FM operation up to 6 GHz is possible. The IM and FM responses of C3CSBH lasers are similar to single-cavity CSBH lasers provided the modulated cavity is above threshold. If the modulated cavity is below threshold, the FM response of the C3laser is larger but rolls off rapidly for modulation frequencies above 200 MHz.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:20 ,  Issue: 11 )