Linewidth Sharpening in Optical Frequency Combs via a Gain Switched Semiconductor Laser with External Optical Feedback

Yuanlong Fan, Kang Li, Pu Li, Bethan Copner, Nigel Copner

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

31 Wedi eu Llwytho i Lawr (Pure)

Crynodeb

In this article, we propose a novel scheme for an optical frequency comb (OFC) generator which implements a gain switched (GS) semiconductor laser (SL) in the presence of external optical feedback (EOF). Numerical results demonstrate that with appropriate choices of the basic system parameters (i.e., the feedback coupling fraction, the laser bias current and the external cavity length), the linewidths in the OFCs generated by the GS SL with EOF can be significantly reduced below that of the free running continuous wave (CW) SL. Such a significant linewidth reduction can be described by a simple analytic expression presented in this article which is found to be in good agreement with the numerical results.

Iaith wreiddiolSaesneg
Rhif yr erthygl9205996
Tudalennau (o-i)105-111
Nifer y tudalennau7
CyfnodolynJournal of Lightwave Technology
Cyfrol39
Rhif cyhoeddi1
Dyddiad ar-lein cynnar25 Medi 2020
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 1 Ion 2021

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