Title :
External optical feedback effects on intensity noise of vertical-cavity surface-emitting lasers
Author :
Ho, Keang-Po ; Walker, Jeffrey D. ; Kahn, Joseph M.
Author_Institution :
Dept. of Electr. & Comput. Sci., California Univ., Berkeley, CA, USA
Abstract :
The authors have experimentally evaluated the effect of external optical feedback on the relative intensity noise (RIN) of a vertical-cavity surface-emitting laser (VCSEL) diode. In the absence of optical feedback, the smallest RIN is found to be -135 dB/Hz. For optical feedback levels approaching -25 dB, the RIN is degraded by about 20 dB. The authors have measured feedback-induced power penalties in a 500-Mb/s intensity-modulation/direct-detection (IM/DD) link and determined that the penalty exceeds 1 dB if the optical feedback ratio is larger than -30 dB.<>
Keywords :
feedback; laser cavity resonators; optical communication equipment; optical links; semiconductor device noise; semiconductor lasers; 500 Mbit/s; VCSEL; external optical feedback; feedback-induced power penalties; intensity noise; intensity-modulation/direct detection link; relative intensity noise; vertical-cavity surface-emitting lasers; High speed optical techniques; Holographic optical components; Laser feedback; Laser noise; Optical attenuators; Optical feedback; Optical interconnections; Optical noise; Surface emitting lasers; Vertical cavity surface emitting lasers;
Journal_Title :
Photonics Technology Letters, IEEE
