Pulse narrowing and RF linewidth reduction of integrated passively mode-locked laser in anticolliding design by means of spectral tuning

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Abstract

In this paper, we present the first tunable extended cavity integrated passively mode-locked laser realized in an anticolliding design. The laser is realized as an InP-based photonic integrated circuit. A detailed study of the laser performance under various operating conditions is presented. The evolution of the radio-frequency (RF) spectrum and optical spectrum with the injection current to the optical amplifier is investigated. Tuning over 9 nm is achieved by injecting current in a distributed Bragg reflector section. We demonstrate that tuning of the optical spectrum toward shorter wavelengths, which increases absorption in the saturable absorber section, leads to an improvement of the mode-locked laser performance in terms of reduction of fundamental RF linewidth and reduction of the pulsewidths.
Original languageEnglish
Article number1502810
Pages (from-to)1-10
Number of pages10
JournalIEEE Photonics Journal
Volume8
Issue number4
DOIs
Publication statusPublished - Aug 2016

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